criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include<bits/stdc++.h>
#define maxn 1005
#define ll long long
using namespace std;
ll dp[maxn],n,a[maxn],anss,l[maxn],r[maxn],id,ans[maxn],tail;
int main()
{
	scanf("%lld",&n);
	dp[0]=-0x3f3f3f3f;
	for(int i=1;i<=n;++i) scanf("%lld",&a[i]),dp[i]=a[i];
	for(int i=1;i<=n;++i) 
	for(int j=1;j<i;++j) 
	{
		if((i-j)%2==0)
		if(dp[j]+a[i]>dp[i]) dp[i]=max(dp[i],dp[j]+a[i]),l[i]=j;
	}
	for(int i=1;i<=n;++i) if(dp[i]>dp[id]) id=i;
	
	ll ans1=0;
	for(int i=1;i<=n;i+=2)
		if(a[i]>0) ans1+=a[i];
		
	ll ans2=0;
	for(int i=2;i<=n;i+=2)
		if(a[i]>0) ans2+=a[i];
	
	cout<<max(0,max(ans1,ans2))<<endl;

	for(int i=n;i>id;--i) ans[++tail]=i;
	while(l[id]!=0){
		int mid=(id+l[id])>>1;
		for(int i=mid;i>l[id];--i)
		ans[++tail]=i;
		id=l[id];
	}
	for(int i=1;i<id;++i) ans[++tail]=1;
	printf("%lld\n",tail);
	for(int i=1;i<=tail;++i) printf("%lld\n",ans[i]);
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:18: error: no matching function for call to 'max(int, const long long int&)'
   27 |         cout<<max(0,max(ans1,ans2))<<endl;
      |               ~~~^~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:27:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   27 |         cout<<max(0,max(ans1,ans2))<<endl;
      |               ~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:27:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   27 |         cout<<max(0,max(ans1,ans2))<<endl;
      |               ~~~^~~~~~~~~~~~~~~~~~
Language: C++

#include <iostream>
#include <vector>
using namespace std;
const int N = 1002;
typedef long long LL;
const LL INF = 1e13;
LL dp[N][N][2], a[N], ok[N]; 
int n, vis[N][N], bst[N][N][2]; // { 0 for L, 1 for R }
void dfs(int L, int R) {
    if (vis[L][R])
        return;
    vis[L][R] = 1;

    if (L == R) {
        dp[L][R][0] = a[L]; bst[L][R][0] = L; return; 
    }
    if (R - L == 1) {
        dp[L][R][0] = a[L]; bst[L][R][0] = L;
        dp[L][R][1] = a[R]; bst[L][R][1] = R; return;
    }
    dp[L][R][0] = dp[L][R][1] = - INF;
    for (int i = L; i < R; i ++) {
        dfs(L,i); dfs(i+1,R);
    }
    if ((R - L) % 2 == 1) {
        int bst_0 = -1, bst_1 = -1;
        for (int i = L; i < R; i ++) {
            if (dp[L][i][0] > dp[L][R][0])
                bst_0 = i, dp[L][R][0] = dp[L][i][0];
        }
        for (int i = R; i > L; i --) {
            if (dp[i][R][1] > dp[L][R][0])
                bst_1 = i-1, dp[L][R][1] = dp[i][R][1];
        }
        bst[L][R][0] = bst_0;
        bst[L][R][1] = bst_1;
    } else {
        int bst_0 = -1;
        dp[L][R][0] = a[L] + a[R]; bst[L][R][0] = (L+R)/2;

        for (int i = L; i < R; i ++) {
            if ((i - L) % 2 == 0) {// 左边长度为奇数
                if (dp[L][i][0] + dp[i+1][R][1] > dp[L][R][0]) {
                    bst_0 = i, dp[L][R][0] = dp[L][i][0] + dp[i+1][R][1];
                }
            } else {                  // 左边长度为偶数
                if (dp[L][i][0] + dp[i+1][R][0] > dp[L][R][0]) {
                    bst_0 = i, dp[L][R][0] = dp[L][i][0] + dp[i+1][R][0];
                }
            }
        }

        bst[L][R][0] = bst_0;
    }
}

void gao(int l, int r, int s) {
    if ((r - l) % 2 == 1) {
        int pos = bst[l][r][s];
        gao(l, pos, s), gao(pos+1, r, s);
    }
    if ((r - l) % 2 == 0) {
        int pos = bst[l][r][s];
        if (bst[l][r][0] == (l + r) / 2) {
            ok[(l+r)>>1] = 1;
        }
        if ((pos - l) % 2 == 1) {
            gao(l, pos, 0); gao(pos+1, r, s);
        } else {
            gao(l, pos, 0); gao(pos+1, r, 1);            
        }
    }
}

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i ++) {
        scanf("%lld", &a[i]);
    }
    LL ans = -INF, bst_L = 1, bst_R = n;
    for (int i = 1; i <= n; i ++) {
        for (int j = i; j <= n; j ++) {
            dfs(i, j);
            if ((j-i)%2 == 0) {
                if (dp[i][j][0] > ans) {
                    ans = dp[i][j][0];
                    bst_L = i, bst_R = j;
                }
            }
        }
    }
    gao(bst_L, bst_R, 0);
    vector<int> v;
    for (int i = 1; i < bst_L; i ++) v.push_back(i);
    for (int i = n; i > bst_R; i --) v.push_back(i);
    for (int i = bst_L; i <= bst_R; i ++) if (ok[i]) v.push_back(i);
    printf("%lld\n", ans);
    printf("%d\n", v.size());
    sort(v.begin(), v.end());
    for (int i = 0; i < v.size(); i ++) {
        printf("%d\n", v[i]);
    }

}




Compiler output:
a.cc: In function 'int main()':
a.cc:99:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   99 |     sort(v.begin(), v.end());
      |     ^~~~
      |     short
Language: C++

#include<bits/stdc++.h>

using namespace std;

#define pq priority_queue
#define mz 1000000007

long long num[1005];
long long dp[1005][1005];
int pre[1005][1005];
vector <int> vec;

void dfs(int x,int y)
{
    int z;
    if(y)
    {
        z=pre[x][y];
        if(z==x || z==x+y)
        {
            if(z==x)
                dfs(x+1,y-1);
            else
                dfs(x,y-1);
        }
        else
        {
            dfs(x,z-1-x);
            dfs(z+1,y-z-1);
        }
        vec.push_back(z);
    }
}

int main()
{
    int n,g;
    long long ans;
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%lld",&num[i]);
    for(int i=1;i<=n;i++)
        for(int j=0;i+j<=n;j++)
        {
            if(j==0)
                dp[i][j]=num[i];
            else
            {
                if(dp[i+1][j-1]>dp[i][j-1]))
                {
                    dp[i][j]=dp[i+1][j-1];
                    pre[i][j]=i;
                }
                else
                {
                    dp[i][j]=dp[i][j-1];
                    pre[i][j]=i+j;
                }
                for(int k=i+1;k<i+j;k++)
                {
                    if(dp[i][k-1-i]+dp[k+1][i+j-k-1]>dp[i][j])
                    {
                        dp[i][k-1-i]+dp[k+1][i+j-k-1],dp[i][j];
                        pre[i][j]=k;
                    }
                }
            }
        }
    printf("%lld\n",dp[1][n-1]);
    go(1,n-1,pre[i][j]);
    for(int i=0;i<vec.size();i++)
        printf("%d\n",vec[i]);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:49:44: error: expected primary-expression before ')' token
   49 |                 if(dp[i+1][j-1]>dp[i][j-1]))
      |                                            ^
a.cc:70:18: error: 'i' was not declared in this scope
   70 |     go(1,n-1,pre[i][j]);
      |                  ^
a.cc:70:21: error: 'j' was not declared in this scope
   70 |     go(1,n-1,pre[i][j]);
      |                     ^
a.cc:70:5: error: 'go' was not declared in this scope; did you mean 'g'?
   70 |     go(1,n-1,pre[i][j]);
      |     ^~
      |     g
Language: C++

#include <cstdio>
#include <vector>
#include <stack>
#include <iostream>
#include <string>
#include <tuple>
#include <random>
#include <map>
#include <queue>
#include <set>
#include <complex>
#include <algorithm>
#include <cassert>
#include <iterator>
#include <numeric>

using namespace std;

typedef long double ld;
typedef long long ll;
typedef pair<ll, ll> P;

const ll INF = 1e15;
const double eps = 1e-6;
const ll MOD = 1000000007;
map<P, ll> mp;
map<P, ll> mov;
vector<ll> a;
ll solve(ll l, ll r) {
	if (r - l == 1)
		return a[l];
	if ((r - l) % 2 == 0 || r - l <= 0)
		return -INF;
	if (mp.find(P(l, r)) != mp.end())
		return mp[P(l, r)];
	ll nowans = -INF;
	for (ll k = l + 1;k < r - 1;k++) {
		ll now = solve(l, k) + solve(k + 1, r);
		if (nowans < now) {
			nowans = now;
			mov[P(l, r)] = k;
		}
	}
	return mp[P(l, r)] = nowans;
}
vector<ll> ans2;
void solve2(ll l, ll r) {
	if (mov.find(P(l, r)) == mov.end())
		return;
	ans2.push_back(mov[P(l, r)]);
	solve2(l, mov[P(l, r)]);
	solve2(mov[P(l, r)] + 1, r);
}

int main() {
	ll N;
	cin >> N;
	a.assign(N+2, INF);
	for (int i = 1;i <= N;i++)
		cin >> a[i];
	ll ans = -INF;
	ll goodl, goodr;
	//for (ll l = 1;l <= N;l++)
		//for (ll r = l + 1;r <= N + 1;r++) {
			ll temp = solve(l, r);
			if (ans < temp) {
				ans = temp;
				goodl = l;
				goodr = r;
			}
		//}
	cout << ans << endl;
	solve2(goodl, goodr);
	for (int i = goodl - 1;i >= 1;i--)
		ans2.push_back(i);
	for (int i = goodr;i <= N;i++)
		ans2.push_back(i);
	reverse(ans2.begin(), ans2.end());
	cout << ans2.size() << endl;
	vector<ll> count(N + 100);
	for (int i = 0;i < ans2.size(); i++) {
		ll cnt = 0;
		for (int j = 0;j < ans2[i];j++)
			cnt += count[j];
		cout << ans2[i] - cnt << endl;
		count[ans2[i]]++;
	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:65:41: error: 'l' was not declared in this scope
   65 |                         ll temp = solve(l, r);
      |                                         ^
a.cc:65:44: error: 'r' was not declared in this scope
   65 |                         ll temp = solve(l, r);
      |                                            ^
Language: C++

#include<bits/stdc++.h>

using namespace std;

#define pq priority_queue
#define mz 1000000007

long long num[1005];
long long dp[1005][1005];

int main()
{
    int n,g;
    long long ans;
    scanf("%d",&n);
    for(int i=1;i<=n;i+=)
        scanf("%lld",&num[i]);
    for(int i=1;i<=n;i++)
        for(int j=0;i+j<=n;j++)
        {
            if(j==0)
                dp[i][j]=num[i][j];
            else
            {
                dp[i][j]=max(dp[i+1][j-1],dp[i][j-1]);
                for(int k=i+1;k<i+j;k++)
                    dp[i][j]=max(dp[i][k-1-i]+dp[k+1][j+j-k-1],dp[i][j]);
            }
        }
    printf("%lld\n",dp[1][n-1]);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:25: error: expected primary-expression before ')' token
   16 |     for(int i=1;i<=n;i+=)
      |                         ^
a.cc:22:32: error: invalid types 'long long int[int]' for array subscript
   22 |                 dp[i][j]=num[i][j];
      |                                ^
Language: C++

#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<string>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
#include<unordered_set>
#include<array>
#include<map>
#include<iomanip>
using namespace std;
typedef long long int llint;
#define mp make_pair
#define mt make_tuple
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define fir first
#define sec second
#define res resize
#define ins insert
#define era erase
const int mod=1000000007;
const llint big=1e15+10;
const long double pai=3.141592653589793238462643383279502884197;
const long double eps=1e-9;
template <class T,class U>bool mineq(T& a,U b){if(a>b){a=b;return true;}return false;}
template <class T,class U>bool maxeq(T& a,U b){if(a<b){a=b;return true;}return false;}
llint gcd(llint a,llint b){if(a%b==0){return b;}else return gcd(b,a%b);}
llint lcm(llint a,llint b){return a/gcd(a,b)*b;}
template<class T> void SO(T& ve){sort(ve.begin(),ve.end());}
template<class T> void REV(T& ve){reverse(ve.begin(),ve.end());}
int LBI(vector<int>ar,int in){return lower_bound(ar.begin(),ar.end(),in)-ar.begin();}
int UBI(vector<int>ar,int in){return upper_bound(ar.begin(),ar.end(),in)-ar.begin();}
int main(void){
	int n,i;cin>>n;
	vector<llint>kaz(n);
	int tid=-1;llint tma=-big;
	for(i=0;i<n;i++){
		cin>>kaz[i];
		if(maxeq(tma,kaz[i])){tid=i;}
	}
	vector<int>retu(n);
	if(tma<=0){retu[tid]=1;cout<<tma<<endl;goto SYUTU;}
	llint Kwa=0,Gwa=0;
	for(i=0;i<n;i++){
		if(kaz[i]<0){continue;}
		if(i%2==0){Gwa+=kaz[i];}
		else{Kwa+=kaz[i];}
	}
	if(Gwa>Kwa){
		for(i=0;i<n;i+=2){if(kaz[i]>=0){retu[i]=1;}}
	}else{
		for(i=1;i<n;i+=2){if(kaz[i]>=0){retu[i]=1;}}
	}
	cout<<max(Gwa,Kwa)<<endl;
	SYUTU:
	vector<int>out;
	while(retu.size()>1){
		int n=retu.size();
		int ok=false;
		for(i=1;i+1<n;i++){
			if(retu[i]==0&&retu[i-1]==retu[i+1]){
				int aa=retu[i-1];
				out.pub(i+1);
				retu.erase(retu.begin()+i-1,retu.begin()+i+2);
				retu.insert(retu.begin()+i-1,aa);
				ok=true;break;
			}
		}
		if(!ok){
			if(retu[0]==0){
				out.pub(1);
				retu.erase(retu.begin());
			}else{
				out.pub(n);
				retu.pob();
			}
		}
	}
	cout<<out.size()<<endl;
	for(auto it:out){cout<<it<<endl;}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:65:9: error: jump to label 'SYUTU'
   65 |         SYUTU:
      |         ^~~~~
a.cc:52:53: note:   from here
   52 |         if(tma<=0){retu[tid]=1;cout<<tma<<endl;goto SYUTU;}
      |                                                     ^~~~~
a.cc:53:21: note:   crosses initialization of 'llint Gwa'
   53 |         llint Kwa=0,Gwa=0;
      |                     ^~~
a.cc:53:15: note:   crosses initialization of 'llint Kwa'
   53 |         llint Kwa=0,Gwa=0;
      |               ^~~
Language: C++

#include<bits/stdc++.h>
#define mp(a,b) make_pair((a),(b))
#define pii pair<int,int>
#define pdd pair<double,double>
#define pll pair<LL,LL>
#define pb push_back
#define x first
#define y second
#define sqr(x) ((x)*(x))
#define EPS 1e-6
#define mii map<int,int>
#define MEM(x) memset(x,0,sizeof(x))
#define MEMS(x) memset(x,-1,sizeof(x))
#define N 200005
//#define M 1000005
#define pi 3.14159265359
#define cpdd const pdd
#define MAXN 100005
#define INF 0x3f3f3f3f
using namespace std;
typedef long long LL;
bitset<600000000> b,ans;
int main(){
	int n;
	scanf("%d",&n);
	int a[1005];
	LL odd=0,even=0;
	LL Max=-1e9-1,Maxi;
	LL all=1;
	for(int i=0;i<n;i++){
		scanf("%d",&a[i]);
		if(a[i]>0){
			if(i%2==0)
			odd+=a[i];
			else
			even+=a[i];
			all=0;
		}
		else{
			if(Max<a[i]){
				Max=a[i];
				Maxi=i;
			}			
		}
	}
	if(all){
		Maxi++;
		printf("%lld\n",Max);
		printf("%d\n",n-1);
		for(int i=n;i>Maxi;i--)
		printf("%d\n",i);

		for(int i=1;i<Maxi;i++)
		printf("1\n",);
	}
	else if(odd>even){
		vector<int> v;
		int cnt=0;
		int hi;
		for(hi=0;a[hi]<0;hi+=2){
			cnt+=2;
		}
		for(int i=n-1;i>=hi;i--){
			if(i%2==0){
				if(a[i]<=0){
					v.pb(i+1);
					cnt+=2;
					if(i==n-1)
					cnt--;
				}
			}
		}
		for(int i=0;i<hi;i++){
			v.pb(1);
		}
		n-=cnt;
		while(n>1){
			v.pb(2);
			n-=2;
		}
		printf("%lld\n",odd);
		printf("%d\n",v.size());
		for(auto it:v)
		printf("%d\n",it);
	}
	else{
		vector<int> v;
		int cnt=1;
		int hi;
		for(hi=1;a[hi]<0;hi+=2){
			cnt+=2;
		}
		for(int i=n-1;i>=hi;i--){
			if(i%2==1){
				if(a[i]<=0){
				//	printf("%d\n",i+1);
					v.pb(i+1);
					cnt+=2;
					if(i==n-1)
					cnt--;
				}
			}
		}
		for(int i=0;i<hi;i++){
			v.pb(1);
		}
		n-=cnt;
		//printf("%d\n",n);
		while(n>1){
			v.pb(2);
			n-=2;
		}
		printf("%lld\n",even);
		printf("%d\n",v.size());
		for(auto it:v)
		printf("%d\n",it);
	}
}
/*
BC
ACC
AABC
CC
ABC
AACC*/

Compiler output:
a.cc: In function 'int main()':
a.cc:54:30: error: expected primary-expression before ')' token
   54 |                 printf("1\n",);
      |                              ^
Language: C++

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;

const int maxn = 1000;
int n, a[maxn];
long long dp[maxn + 1][2];
bool choose[maxn + 1][2];
bool ans[maxn];

int main(void) {
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    scanf("%d", a + i);
  }
  dp[0][0] = dp[0][1] = 0;
  for (int i = 0; i < n; ++i) {
    dp[i + 1][0] = dp[i][1];
    if (dp[i][1] + a[i] > dp[i + 1][0]) {
      dp[i + 1][0] = dp[i][1] + a[i];
      choose[i + 1][0] = true;
    }
    dp[i + 1][1] = dp[i][0];
  }
  int j;
  if (dp[n][0] > dp[n][1]) {
    j = 0;
  } else {
    j = 1;
  }
  for (int i = n - 1; i >= 0; --i) {
    if (choose[i + 1][j]) {
      ans[i] = true;
      j = 1;
    } else {
      j = !j;
    }
  }
  vector<int> out;
  if (count(ans, ans + n, true)) {
    printf("%lld\n", max(dp[n][0], dp[n][1]));
    for (int i = n - 1; i >= 0; --i) {
      if (ans[i]) break;
      //printf("%d\n", i + 1);
      out.push_back(i + 1);
    }
    for (int i = 0; i < n; ++i) {
      if (ans[i]) break;
      //puts("1");
      out.push_back(1);
    }
    for (int i = 0; i < n; ++i) {
      if (ans[i]) {
        int j = i + 1;
        while (j < n && !ans[j]) {
          ++j;
        }
        if (j < n) {
          for (int k = 0; k < j - i; k += 2) {
            //puts("2");
            out.push_back(2);
          }
        }
      }
    }
  } else {
    int minid = -1, minval = -2e9;
    for (int i = 0; i < n; ++i) {
      if (a[i] > minval) {
        minval = a[i];
        minid = i;
      }
    }
    printf("%d\n", minval);
    for (int i = n - 1; i > minid; --i) {
      //printf("%d\n", i + 1);
      out.push_back(i + 1);
    }
    for (int i = 0; i < minid; ++i) {
      //puts("1");
      out.push_back(1);
    }
  }
  printf("%d\n", (int)out.size());
  for (int i : out) {
    printf("%d\n", i);
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:40:3: error: 'vector' was not declared in this scope
   40 |   vector<int> out;
      |   ^~~~~~
a.cc:4:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    3 | #include <algorithm>
  +++ |+#include <vector>
    4 | using namespace std;
a.cc:40:10: error: expected primary-expression before 'int'
   40 |   vector<int> out;
      |          ^~~
a.cc:46:7: error: 'out' was not declared in this scope
   46 |       out.push_back(i + 1);
      |       ^~~
a.cc:51:7: error: 'out' was not declared in this scope
   51 |       out.push_back(1);
      |       ^~~
a.cc:62:13: error: 'out' was not declared in this scope
   62 |             out.push_back(2);
      |             ^~~
a.cc:78:7: error: 'out' was not declared in this scope
   78 |       out.push_back(i + 1);
      |       ^~~
a.cc:82:7: error: 'out' was not declared in this scope
   82 |       out.push_back(1);
      |       ^~~
a.cc:85:23: error: 'out' was not declared in this scope
   85 |   printf("%d\n", (int)out.size());
      |                       ^~~
Language: C++

#include<cstdio>
#include<cstring>
#include<iostream>
#define maxn 200100
using namespace std;
int n,m,tot,head[1010],th[1010][1010];
bool vis[1010];
struct point{
	int to,nxt;
}a[maxn];
void add(int x,int y)
{
	a[++tot].to=y;
	a[tot].nxt=head[x];
	head[x]=tot;
}
void dfs(int x,int s,int cur)
{
	if(vis[x]&&(th[s][x]==-1||th[s][x]==cur)) return ;
	vis[x]=1; 
	if(!th[s][x]) th[s][x]=cur;
	else if(cur!=th[s][x]) th[s][x]=-1;
	for(int i=head[x];i;i=a[i].nxt)
		dfs(a[i].to,s,cur);
}
int main()
{
	scanf("%d%d",&n,&m);
	for(int i=1,x,y;i<=m;i++)
	{
		scanf("%d%d",&x,&y);
		add(x,y);
	}
	for(int i=1;i<=n;i++) {
		for(int j=1;j<=n;j++) vis[j]=0;
		vis[i]=1; th[i][i]=-1;
		for(int j=head[i];j;j=a[j].nxt) dfs(a[j].to,i,j);
	}
	for(int i=1;i<=m;i++)
	{
		int x=a[i].fr,y=a[i].to;
		if((th[y][x]&&th[x][y]!=-1)||(!th[y][x]&&th[x][y]==-1))
			puts("diff");
		else puts("same");
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:28: error: 'struct point' has no member named 'fr'
   41 |                 int x=a[i].fr,y=a[i].to;
      |                            ^~
a.cc:42:24: error: 'y' was not declared in this scope
   42 |                 if((th[y][x]&&th[x][y]!=-1)||(!th[y][x]&&th[x][y]==-1))
      |                        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define REP(i,a,b) for(int i=(a),_end_=(b);i<=_end_;i++)
#define DREP(i,a,b) for(int i=(a),_end_=(b);i>=_end_;i--)
#define EREP(i,u) for(int i=start[u];i;i=e[i].next)
#define fi first
#define se second
#define mkr(a,b) make_pair(a,b)
#define SZ(A) ((int)A.size())
template<class T>inline void chkmin(T &a,T b){ if(a>b)a=b;}
template<class T>inline void chkmax(T &a,T b){ if(a<b)a=b;}
inline int read()
{
	int s=0,f=1;char ch=getchar();
	while(!isdigit(ch) && ch!='-')ch=getchar();
	if(ch=='-')ch=getchar(),f=-1;
	while(isdigit(ch))s=s*10+ch-'0',ch=getchar();
	return ~f?s:-s;
}

const int maxn=1e3+20;

struct node {
	int v,next;
};
node e[200020];
int cnt,start[maxn];
inline void addedge(int u,int v){ e[++cnt]=(node){v,start[u]};start[u]=cnt;}

int n,m;
int f[maxn][maxn];
int rt,D;
int g[maxn][maxn];
int vis[maxn];
int A[maxn],B[maxn];
int graph[maxn][maxn];

void dfs(int u)
{
	f[rt][u]=1;
	EREP(i,u)
	{
		int v=e[i].v;
		if(f[rt][v])continue;
		dfs(v);
	}
}

struct Edge {
	int u,v;
};
Edge E[200020];

void dfs1(int u)
{
	vis[u]=D;
	EREP(i,u)
	{
		int v=e[i].v;
		if(vis[v])continue;
		dfs1(v);
	}
}

inline void init()
{
	n=read(); m=read();
	REP(i,1,m)
	{
		int u=read(),v=read();
		E[i]=(Edge){u,v};
		addedge(u,v);
		graph[u][v]=1;
	}
	REP(u,1,n)
	{
		rt=u;
		dfs(u);
	}
	REP(u,1,n)
	{
		static int st[maxn],top; top=0;
		EREP(i,u)st[++top]=e[i].v;
		memset(vis,0,sizeof(int)*(n+1));
		vis[u]=top+1;
		REP(j,1,top)
		{
			D=j;
			if(!vis[st[j]])dfs1(st[j]);
		}
		memcpy(A,vis,sizeof(int)*(n+1));
		memset(vis,0,sizeof(int)*(n+1));
		vis[u]=top+1;
		DREP(j,top,1)
		{
			D=j;
			if(!vis[st[j]])dfs1(st[j]);
		}
		memcpy(B,vis,sizeof(int)*(n+1));
		REP(j,1,top)if(A[st[j]]!=B[st[j]])g[u][st[j]]=1;
		
	}
}

inline void doing()
{
	REP(i,1,m)
	{
		int u=E[i].u,v=E[i].v;
		if(f[v][u]^(g[u][v]))puts("diff");
		else puts("same");
	}
}

int main()
{
#endif
	init();
	doing();
	return 0;
}


Compiler output:
a.cc:118:2: error: #endif without #if
  118 | #endif
      |  ^~~~~
Language: C++

#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <unordered_map>
#include <unordered_set>
#include <cmath>
#include <ctime>
#include <string>
#include <queue>
#include <sstream>
using namespace std;
#define x first
#define y second
#define mp make_pair
#define elif else if
#define prev prev2
#define Edge pair <int, int>
#define next next2
#define u first
#define v second
#define int long long
typedef long long ll;
typedef long double ld;
const int MAXN = 1000, N = 1000, MAXM = 2e5;
vector<int> g[MAXN], gt[MAXN];
int a[MAXN], b[MAXN], c1[MAXN], c2[MAXN];
vector<int> topsort;
int vis[MAXN];
Edge ed[MAXM];
bool used[N];
void dfs(int u) {
    used[u] = 1;
    for (int e : g[u]) {
        int v = ed[e].u ^ ed[e].v ^ u;
        if (!used[v]) dfs(v);
    }   
}   
void solve(int u) {
	//cout << "u: " << u << endl;
    memset(used, 0, sizeof used);
    for (int e : g[u]) {
        int v = ed[e].u ^ ed[e].v ^ u;
        //cout << v << " " << used[v] << endl;
        if (used[v]) {
            c2[e] = 1;
        }       
        else {
            dfs(v);
        }   
    }   
    memset(used, 0, sizeof used);
    reverse(g[u].begin(), g[u].end());
    for (int e : g[u]) {
        int v = ed[e].u ^ ed[e].v ^ u;
        if (used[v]) {
            c2[e] = 1;
        }       
        else {
            dfs(v);
        }   
    }   
}   
void dfst1(int v) {
	vis[v] = 1;
	for (int e : g[v]) {
		int u = b[e];
		if (!vis[u])
			dfst1(u);
	}
	topsort.push_back(v);
}
int clr = 0;
void dfst2(int v) {
	vis[v] = clr;
	for (int e : gt[v]) {
		int u = a[e];
		if (!vis[u])
			dfst2(u);
	}
}
void solve() {
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < m; ++i) {
		cin >> a[i] >> b[i];
		--a[i];
		--b[i];
		g[a[i]].push_back(i);
		gt[b[i]].push_back(i);
	}
	for (int i = 0; i < n; ++i)
		if (!vis[i])
			dfst1(i);
	fill(vis, vis + n, 0);
	reverse(topsort.begin(), topsort.end());
	for (int v : topsort)
		if (!vis[v]) {
			++clr;
			dfst2(v);
		}

	for (int i = 0; i < m; ++i) 
		c1[i] = (vis[a[i]] == vis[b[i]]);
	for (int i = 0; i < m; ++i) {
        ed[i] = {a[i], b[i]};
    }   
    for (int i = 0; i < n; ++i) {
        solve(i);
    }

	for (int i = 0; i < m; ++i) {
		//cout << c1[i] << c2[i];
        if (c1[i] ^ c2[i]) {
            cout << "diff\n";
        }   
        else {
            cout << "same\n";
        }
    }   
	return;
}

signed main() {
	ios_base::sync_with_stdio(false);

	solve();

	return 0;
}

Compiler output:
a.cc: In function 'void solve(long long int)':
a.cc:42:5: error: 'memset' was not declared in this scope
   42 |     memset(used, 0, sizeof used);
      |     ^~~~~~
a.cc:13:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
   12 | #include <sstream>
  +++ |+#include <cstring>
   13 | using namespace std;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N, M;
    cin >> N >> M;
    vector<vector<int>> e(N);
    using P = pair<int, int>;
    vector<P> edge(M);
    vector<vector<int>> start(N);
    for (int i = 0; i < M; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        e[a].push_back(b);
        edge[i] = {a, b};
        start[a].push_back(i);
    }
    vector<vector<bool>> ok(N, vector<bool>(N, false));
    for (int i = 0; i < N; i++) {
        queue<int> q;
        q.push(i);
        ok[i][i] = true;
        while (not q.empty()) {
            const int s = q.front();
            q.pop();
            for (const int to : e[s]) {
                if (ok[i][to]) { continue; }
                ok[i][to] = true;
                q.push(to);
            }
        }
    }
    vector<bool> ans(M);
    for (int i = 0; i < N; i++) {
        vector<int> dp(N, -1);  // -1: yet, M: doubled
        queue<int> q;
        for (const int c : start[i]) {
            dp[edge[c].second] = c;
            q.push(edge[c].second);
        }
        while (not q.empty()) {
            const int s = q.front();
            q.pop();
            if (s == i) { continue; }
            for (const int to : e[s]) {
                i if (dp[to] == M or dp[to] == dp[s]) { continue; }
                if (dp[to] == -1) {
                    dp[to] = dp[s];
                    q.push(to);
                } else {
                    dp[to] = M;
                    q.push(to);
                }
            }
        }
        for (const int c : start[i]) {
            const bool ts = ok[edge[c].second][edge[c].first];
            const bool dst = dp[edge[c].second] == M;
            ans[c] = ts ^ dst;
        }
    }
    for (int i = 0; i < M; i++) { cout << (ans[i] ? "diff" : "same") << endl; }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:18: error: expected ';' before 'if'
   47 |                 i if (dp[to] == M or dp[to] == dp[s]) { continue; }
      |                  ^~~
      |                  ;
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N, M;
    cin >> N >> M;
    vector<vector<int>> e(N);
    using P = pair<int, int>;
    vector<P> edge(M);
    vector<vector<int>> start(N);
    for (int i = 0; i < M; i++) {
        int a, b;
        cin >> a >> b;
        a--, b--;
        e[a].push_back(b);
        edge[i] = {a, b};
        start[a].push_back(i);
    }
    vector<vector<bool>> ok(N, vector<bool>(N, false));
    for (int i = 0; i < N; i++) {
        queue<int> q;
        q.push(i);
        ok[i][i] = true;
        while (not q.empty()) {
            const int s = q.front();
            q.pop();
            for (const int to : e[s]) {
                if (ok[i][to]) { continue; }
                ok[i][to] = true;
                q.push(to);
            }
        }
    }
    vector<bool> ans(M);
    for (int i = 0; i < N; i++) {
        vector<int> dp(N, -1);  // -1: yet, M: doubled
        queue<int> q;
        for (const int c : start[i]) {
            dp[edge[c].second] = c;
            q.push(edge[c].second);
        }
        while (not q.empty()) {
            const int s = q.front();
            q.pop();
            if (s == i) { continue; }
            for (const int to : e[s]) {i
                if (dp[to] == M or dp[to] == dp[s]) { continue; }
                if (dp[to] == -1) {
                    dp[to] = dp[s];
                    q.push(to);
                } else {
                    dp[to] = M;
                    q.push(to);
                }
            }
        }
        for (const int c : start[i]) {
            const bool ts = ok[edge[c].second][edge[c].first];
            const bool dst = dp[edge[c].second] == M;
            ans[c] = ts ^ dst;
        }
    }
    for (int i = 0; i < M; i++) { cout << (ans[i] ? "diff" : "same") << endl; }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:46:41: error: expected ';' before 'if'
   46 |             for (const int to : e[s]) {i
      |                                         ^
      |                                         ;
   47 |                 if (dp[to] == M or dp[to] == dp[s]) { continue; }
      |                 ~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int N=1e3+1;
int n,m,sum;
int f[N][N][2],e[N*N][2],g[N],a[N*N][2];
auto F=f[0];
bool bz[N],bz1[N];
void ins(int x,int y){
    static int sum=1;
    a[++sum][0]=y,a[sum][1]=g[x],g[x]=sum;
}
void dfs(int x,int s,int v,int dep){ 
    static int y;
    if (dep>100)return;
    for (int i=g[x];i&&sum;i=a[i][1])
        if (a[i][0]!=s){
            y=a[i][0];
            if (x==s)v=y;
            if (F[y][0]==v||F[y][1]==v||(F[y][0]&&F[y][1])){
                bz1[x]|=bz1[y];
                continue;
            }
            if (!F[y][0]){
                F[y][0]=v;
                dfs(y,s,v,dep+1);
                bz1[x]|=bz1[y];
            }else{
                F[y][1]=v;
                if (bz[y])sum--,bz[y]=0;
                if (!sum)return;
                if (bz1[y])dfs(y,s,v,dep+1);
            }
        }
}
inline int read() {
    char ch = getchar(); int x = 0, f = 1;
    while(ch < '0' || ch > '9') {
        if(ch == '-') f = -1;
        ch = getchar();
    } while('0' <= ch && ch <= '9') {
        x = x * 10 + ch - '0';
        ch = getchar();
    } return x * f;
}
int main(){
    n=read();
    m=read();
    for (int i=1;i<=m;i++){
        e[i][0]=read();
        e[i][1]=read();
        ins(e[i][0],e[i][1],0);
    }
    for (int i=1;i<=n;i++){
        F=f[i];
        for (int j=1;j<=n;j++)bz1[j]=0;
        for (int j=g[i];j;j=a[j][1])sum++,bz1[a[j][0]]=bz[a[j][0]]=1;
        dfs(i,i,0);
    }
    for (int i=1;i<=m;i++){
        bool sig=f[e[i][1]][e[i][0]][0];
        bool sig1=((f[e[i][0]][e[i][1]][0]&&f[e[i][0]][e[i][1]][0]!=e[i][1])||(f[e[i][0]][e[i][1]][1]&&f[e[i][0]][e[i][1]][1]!=e[i][1]));
        sig==sig1?printf("same\n"):printf("diff\n");
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:51:12: error: too many arguments to function 'void ins(int, int)'
   51 |         ins(e[i][0],e[i][1],0);
      |         ~~~^~~~~~~~~~~~~~~~~~~
a.cc:8:6: note: declared here
    8 | void ins(int x,int y){
      |      ^~~
a.cc:57:12: error: too few arguments to function 'void dfs(int, int, int, int)'
   57 |         dfs(i,i,0);
      |         ~~~^~~~~~~
a.cc:12:6: note: declared here
   12 | void dfs(int x,int s,int v,int dep){
      |      ^~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main()
{
    string a[3];
    for (int i = 0; i < 3; i++)
        cin >> a[i];
    string b = a[0].at(0);
    b += a[1].at(1);
    b += a[2].at(2);
    cout << b;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:23: error: conversion from '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} to non-scalar type 'std::string' {aka 'std::__cxx11::basic_string<char>'} requested
   10 |     string b = a[0].at(0);
      |                ~~~~~~~^~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  strin a, b, c;
  cin >> a >> b >> c;
  cout << a.at(0) << b.at(1) << c.at(2);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'strin' was not declared in this scope; did you mean 'stdin'?
    5 |   strin a, b, c;
      |   ^~~~~
      |   stdin
a.cc:6:10: error: 'a' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |          ^
a.cc:6:15: error: 'b' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |               ^
a.cc:6:20: error: 'c' was not declared in this scope
    6 |   cin >> a >> b >> c;
      |                    ^
Language: C++

#incllude<bits/stdc++.h>
using namespace std;
int main(){
  string a,b,c;
  cin>>a>>b>>c;
  cout<<a.at(0)<<b.at(1)<<c.at(2)<<endl;
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #incllude; did you mean #include?
    1 | #incllude<bits/stdc++.h>
      |  ^~~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:4:3: error: 'string' was not declared in this scope
    4 |   string a,b,c;
      |   ^~~~~~
a.cc:1:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
  +++ |+#include <string>
    1 | #incllude<bits/stdc++.h>
a.cc:5:3: error: 'cin' was not declared in this scope
    5 |   cin>>a>>b>>c;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #incllude<bits/stdc++.h>
a.cc:5:8: error: 'a' was not declared in this scope
    5 |   cin>>a>>b>>c;
      |        ^
a.cc:5:11: error: 'b' was not declared in this scope
    5 |   cin>>a>>b>>c;
      |           ^
a.cc:5:14: error: 'c' was not declared in this scope
    5 |   cin>>a>>b>>c;
      |              ^
a.cc:6:3: error: 'cout' was not declared in this scope
    6 |   cout<<a.at(0)<<b.at(1)<<c.at(2)<<endl;
      |   ^~~~
a.cc:6:3: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:6:36: error: 'endl' was not declared in this scope
    6 |   cout<<a.at(0)<<b.at(1)<<c.at(2)<<endl;
      |                                    ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #incllude<bits/stdc++.h>
Language: C++

#include <iostream>
using namespace std;
int main()
{
  string c1,c2,c3;
  cin>>c1>>c2>>c3;
  cout<<c1[0]<<c[1]<<c[2];
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:16: error: 'c' was not declared in this scope; did you mean 'c3'?
    7 |   cout<<c1[0]<<c[1]<<c[2];
      |                ^
      |                c3
Language: C++

import Control.Monad (replicateM)

main = do
    c <- replicateM 3 getLine
    putStrLn $ [c !! i !! i | i <- [0..2]]


Compiler output:
a.cc:5:37: error: too many decimal points in number
    5 |     putStrLn $ [c !! i !! i | i <- [0..2]]
      |                                     ^~~~
a.cc:1:1: error: 'import' does not name a type
    1 | import Control.Monad (replicateM)
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a;
  int b;
  int count=0;

   
  cin >> a >>b;
  
  for (int i = a;i<=b; i++) {
      if(c==f&&d==e){
       count++;
   }
   int c;
   int d;
   int e;
   int f;
   int g;
   g=i;
   c=g%10;
   g/=10;
   d=g%10;
   g/=100;
   e=g%10;
   g/=10;
   f=g%10;
 
  }
  cout <<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:10: error: 'c' was not declared in this scope
   13 |       if(c==f&&d==e){
      |          ^
a.cc:13:13: error: 'f' was not declared in this scope
   13 |       if(c==f&&d==e){
      |             ^
a.cc:13:16: error: 'd' was not declared in this scope
   13 |       if(c==f&&d==e){
      |                ^
a.cc:13:19: error: 'e' was not declared in this scope
   13 |       if(c==f&&d==e){
      |                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a;
  int b;
  int count=0;
   int c;
   int d;
   int e;
   int f;
   int g;

   
  cin >> a >>b;
  
  for (int i = a; i < =b; i++) {

   g=i;
   c=g%10;
   g/=10;
   d=g%10;
   g/=100;
   e=g%10;
   g/=10;
   f=g%10;
     if(c==f&&d==e){
       count++;
   }
  }
  cout <<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:23: error: expected primary-expression before '=' token
   17 |   for (int i = a; i < =b; i++) {
      |                       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a;
  int b;
  int count=0;

   
  cin >> a >>b;
  
  for (int i = a; i < =b; i++) {
      if(c==f&&d==e){
       count++;
   }
   int c;
   int d;
   int e;
   int f;
   int g;
   g=i;
   c=g%10;
   g/=10;
   d=g%10;
   g/=100;
   e=g%10;
   g/=10;
   f=g%10;
 
  }
  cout <<count<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:23: error: expected primary-expression before '=' token
   12 |   for (int i = a; i < =b; i++) {
      |                       ^
a.cc:13:10: error: 'c' was not declared in this scope
   13 |       if(c==f&&d==e){
      |          ^
a.cc:13:13: error: 'f' was not declared in this scope
   13 |       if(c==f&&d==e){
      |             ^
a.cc:13:16: error: 'd' was not declared in this scope
   13 |       if(c==f&&d==e){
      |                ^
a.cc:13:19: error: 'e' was not declared in this scope
   13 |       if(c==f&&d==e){
      |                   ^
Language: Java

import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String first_line = scanner.nextLine();
		String second_line = scanner.nextLine();
		String third_line = scanner.nextLine();

        System.out.print(first_line.substring(0,1));
        System.out.print(second_line.substring(1,2));
        System.out.print(third_line.substring(2,3));
    }
}

Compiler output:
Main.java:8: error: cannot find symbol
        String first_line = scanner.nextLine();
                            ^
  symbol:   variable scanner
  location: class Main
Main.java:9: error: cannot find symbol
		String second_line = scanner.nextLine();
		                     ^
  symbol:   variable scanner
  location: class Main
Main.java:10: error: cannot find symbol
		String third_line = scanner.nextLine();
		                    ^
  symbol:   variable scanner
  location: class Main
3 errors
Language: C++

#include<bits/stdc++.h>
#define INF 2000000000
#define MOD 1000000007
#define EPS (1e-10)

using namespace std;

int main(int argc, char *argv[]) {

	for (int i = 0; i < 3; i++) {
		string s; cin >> s;
		cout << s[i]  
	}
	cout << endl;

	return 0;
}


Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:12:29: error: expected ';' before '}' token
   12 |                 cout << s[i]
      |                             ^
      |                             ;
   13 |         }
      |         ~
Language: C

#include<bits/stdc++.h>
using namespace std;
int main()
{
  char mat[3][3];
  int i,j;
  for(i=0;i<3;i++)
  {
    for(j=0;j<3;j++)
    {
      cin>>mat[i][j];
    }
  }
  string s ="";
  s=s+mat[0][0]+mat[1][1]+mat[2][2];
  cout<<s;
  return 0;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
#define int long long
using namespace std;
signed main() {
	string A, B, C;
	cin >> A >> B >> C;

	cout << S.at(0)+S.at(1)+S.at(2) << endl;

	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:17: error: 'S' was not declared in this scope
   24 |         cout << S.at(0)+S.at(1)+S.at(2) << endl;
      |                 ^
Language: C++

#include<bits/stdc++.h>

int main(){
char mat[3][3];
  for(auto i=0; i<3; i++){
  	for(auto j=0; j<3; j++) cin>>mat[i][j];
  }
  
  for(auto i=0; i<3; i++){
  	for(auto j=0; j<3; j++) if(i == j) cout<<mat[i][j];
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:33: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    6 |         for(auto j=0; j<3; j++) cin>>mat[i][j];
      |                                 ^~~
      |                                 std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:10:44: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   10 |         for(auto j=0; j<3; j++) if(i == j) cout<<mat[i][j];
      |                                            ^~~~
      |                                            std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define _GLIBCXX_DEBUG
#define all(x) x.begin(), x.end()
using namespace std;
typedef long long ll;
typedef pair<int, int> pair;
const int inf = 1000000000; //10^9
const ll inff = 1000000000000000000; //10^18

int main(){
    vector<string> a(3); 
    rep(i, n) {
        cin >> a[i];
    }

    cout << a[0][0] << a[1][1] << a[2][2] << endl; 

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:12: error: 'n' was not declared in this scope
   13 |     rep(i, n) {
      |            ^
a.cc:2:45: note: in definition of macro 'rep'
    2 | #define rep(i, n) for (int i = 0; i < (int)(n); i++)
      |                                             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  string a,b,c;cin >> a>>b>>c;
  cout << a[0] << b[1] << c[2] <<< endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:34: error: expected primary-expression before '<' token
    6 |   cout << a[0] << b[1] << c[2] <<< endl;
      |                                  ^
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<iomanip>
#define rep(i, a, n) for(int i = a; i < n; i++)
using namespace std;
int main(){
 char a[9];
  rpe(i, 0, 9){
    cin >> a[i];
  }
  cout << a[0] << a[4] << a[8] << "\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:7: error: 'i' was not declared in this scope
   11 |   rpe(i, 0, 9){
      |       ^
a.cc:11:3: error: 'rpe' was not declared in this scope; did you mean 'rep'?
   11 |   rpe(i, 0, 9){
      |   ^~~
      |   rep
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  
  vector<string>x = { a,b,c,d,e,f,g,h,i }
  
  cout << a << e << i << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:23: error: 'a' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                       ^
a.cc:6:25: error: 'b' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                         ^
a.cc:6:27: error: 'c' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                           ^
a.cc:6:29: error: 'd' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                             ^
a.cc:6:31: error: 'e' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                               ^
a.cc:6:33: error: 'f' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                                 ^
a.cc:6:35: error: 'g' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                                   ^
a.cc:6:37: error: 'h' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                                     ^
a.cc:6:39: error: 'i' was not declared in this scope
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                                       ^
a.cc:6:41: error: could not convert '{<expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>}' from '<brace-enclosed initializer list>' to 'std::vector<std::__cxx11::basic_string<char> >'
    6 |   vector<string>x = { a,b,c,d,e,f,g,h,i }
      |                                         ^
      |                                         |
      |                                         <brace-enclosed initializer list>
a.cc:8:3: error: expected ',' or ';' before 'cout'
    8 |   cout << a << e << i << endl;
      |   ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
  
  vector<int>x = { a,b,c,d,e,f,g,h,i }
  
  cout << a << e << i << endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:20: error: 'a' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                    ^
a.cc:6:22: error: 'b' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                      ^
a.cc:6:24: error: 'c' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                        ^
a.cc:6:26: error: 'd' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                          ^
a.cc:6:28: error: 'e' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                            ^
a.cc:6:30: error: 'f' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                              ^
a.cc:6:32: error: 'g' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                                ^
a.cc:6:34: error: 'h' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                                  ^
a.cc:6:36: error: 'i' was not declared in this scope
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                                    ^
a.cc:6:38: error: could not convert '{<expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>, <expression error>}' from '<brace-enclosed initializer list>' to 'std::vector<int>'
    6 |   vector<int>x = { a,b,c,d,e,f,g,h,i }
      |                                      ^
      |                                      |
      |                                      <brace-enclosed initializer list>
a.cc:8:3: error: expected ',' or ';' before 'cout'
    8 |   cout << a << e << i << endl;
      |   ^~~~
Language: Java

import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String ans = "";
    for (int i = 0; i < 3; i++){
      for (int j = 0; j < 3; j++){
        String s = sc.next();
        if (i == j) ans += s;
      }
    }
    System.out.printl(ans);
  }
}


Compiler output:
Main.java:13: error: cannot find symbol
    System.out.printl(ans);
              ^
  symbol:   method printl(String)
  location: variable out of type PrintStream
1 error