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

#include<vector>
#include<cstdio>
using namespace std;
int id[600][600],n,d1,d2,R;
vector<int> e[360000];
int id2[600][600];
int col[360000],px[360000],py[360000];
vector<int> A,B;
void add_edge(int dx,int dy){
	for(int i=0; i<R; i++)for(int j=0; j<R; j++){
		if(id[i][j] == -1)continue;
		int i2 = i+dx, j2 = j+dy;
		if(i2>=0 && i2<R && j2>=0 && j2<R && id[i2][j2] !=-1){
			e[id[i][j]].push_back(id[i2][j2]);
		}
	}
}
void dfs(int x,int c){
	if(col[x] == 0){
		if(c==1){
			A.push_back(x);
		}else
			B.push_back(x);
		col[x] = c;
		for(auto y : e[x]){
			dfs(y, -c);
		}
	}
}
void proc(int&m,int X){
	for(int i=0; i<m; i++){
		e[i].clear();
		col[i] = 0;
	}
	for(int i=0; i<R; i++)for(int j=0; j<R; j++)if(id[i][j]!=-1){
		px[id[i][j]] = i;
		py[id[i][j]] = j;
	}
	for(int i=0; i*i<=X; i++){
		int z=X-i*i;
		int j=(int)sqrt(z+.5);
		if(j*j==z){
			add_edge(i,j);
			if(j>0)add_edge(i,-j);
			if(i>0)add_edge(-i,j);
			if(i>0&&j>0)add_edge(-i,-j);
		}
	}
	int m2 = 0;
	for(int i=0; i<R; i++)for(int j=0; j<R; j++)if(id[i][j] != -1 && col[id[i][j]] == 0){
		A.clear();
		B.clear();
		dfs(id[i][j],1);
		if(A.size() < B.size())swap(A,B);
		for(auto cur : A){
			id2[px[cur]][py[cur]] = m2++;
		}
		for(auto cur : B){
			id2[px[cur]][py[cur]] = -1;
		}
	}
	memcpy(id,id2,sizeof(id));
	m = m2;
}
int main(){
	scanf("%d%d%d",&n,&d1,&d2);
	R = 2 * n;
	int t=0;
	for(int i=0; i<R; i++)
	for(int j=0; j<R; j++)
		id[i][j] = t++;
	proc(t,d1);
	proc(t,d2);
	for(int i=0,t=n*n; i<R&&t>0; i++)
		for(int j=0; j<R&&t>0; j++)
			if(id[i][j] != -1){
				printf("%d %d\n",i,j);
				--t;
			}
	return 0;
}


Compiler output:
a.cc: In function 'void proc(int&, int)':
a.cc:41:28: error: 'sqrt' was not declared in this scope
   41 |                 int j=(int)sqrt(z+.5);
      |                            ^~~~
a.cc:62:9: error: 'memcpy' was not declared in this scope
   62 |         memcpy(id,id2,sizeof(id));
      |         ^~~~~~
a.cc:3:1: note: 'memcpy' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include<cstdio>
  +++ |+#include <cstring>
    3 | using namespace std;
Language: C++

#include<bits/stdc++.h>

using namespace std;

#define allof(x) (x).begin(), (x).end()

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 606;

int N;
vector<pii> P1, P2;
int D1, D2;

int col1[MAXN][MAXN];
int col2[MAXN][MAXN];

void dfs1(int r, int c){
    for(pii p : P1){
        int nr = r + p.first;
        int nc = c + p.second;

        if(1 <= nr && nr <= 2 * N && 1 <= nc && nc <= 2 * N && col1[nr][nc] == -1){
            col1[nr][nc] = !col1[r][c];
            dfs1(nr, nc);
        }
    }
}

void dfs2(int r, int c){
    for(pii p : P2){
        int nr = r + p.first;
        int nc = c + p.second;

        if(1 <= nr && nr <= 2 * N && 1 <= nc && nc <= 2 * N && col2[nr][nc] == -1){
            col2[nr][nc] = !col2[r][c];
            dfs2(nr, nc);
        }
    }
}

vector<pii> ans[2][2];

int main(){
    cin.tie(0);
    cin.sync_with_stdio(0);

    memset(col, -1, sizeof col);

    cin >> N >> D1 >> D2;

    for(int a = -2 * N; a <= 2 * N; a++){
        for(int b = -2 * N; b <= 2 * N; b++){
            if(a * a + b * b == D1){
                P1.push_back({a, b});
            }
            if(a * a + b * b == D2){
                P2.push_back({a, b});
            }
        }
    }

    for(int a = 1; a <= 2 * N; a++){
        for(int b = 1; b <= 2 * N; b++){
            if(col1[a][b] == -1){
                col1[a][b] = 0;
                dfs1(a, b);
            }
            if(col2[a][b] == -1){
                col2[a][b] = 0;
                dfs2(a, b);
            }           
            ans[col1[a][b]][col2[a][b]].push_back({a, b});
        }
    }

    for(int a = 0; a < 2; a++){
        for(int b = 0; b < 2; b++){
            if((int)ans[a][b].size() >= N * N){
                for(int c = 0; c < N * N; c++){
                    cout << ans[a][b][c].first - 1 << " " << ans[a][b][c].second - 1 << "\n";
                }
                return 0;
            }
        }
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:50:12: error: 'col' was not declared in this scope; did you mean 'cosl'?
   50 |     memset(col, -1, sizeof col);
      |            ^~~
      |            cosl
Language: C++

#include <iostream>
#include <vector>
using namespace std;
 
bool flag[601][601];
 
int main() {
 
  long long int n, d[2];
  cin >> n >> d[0] >> d[1];
 
  vector< pair< long long int, long long int > > v;
  for ( long long int p = 0; p < 2; p++ ) {
    for ( long long int i = 0; i * i <= d[p]; i++ ) {
      for ( long long int j = 0; j * j <= d[p]; j++ ) {
				if ( i * i + j * j != d[p] ) continue;
				
				v.push_back( make_pair(  i,  j ) );
				v.push_back( make_pair( -i,  j ) );
				v.push_back( make_pair(  i, -j ) );
				v.push_back( make_pair( -i, -j ) );
      }
    }
  }
 
  long long int ans = 0;
 
  for ( long long int i = 0; i < n * 2; i++ ) {
    for ( long long int j = 0; j < n * 2; j++ ) {
			const int orig_i = i;
			const int orig_j = j;
      if (flag[i][j]){ continue; }
      
      bool q = true;
      for ( long long int p = 0; p < v.size(); p++ ) {
				long long int ii = i + v[p].first;
				long long int jj = j + v[p].second;
				if ( ii < 0 || ii >= n * 2 ){ continue; }
				if ( jj < 0 || jj >= n * 2 ){ continue; }
				if ( flag[ii][jj] == true ) {
					q = false; break;
				}
      }
			
      if ( q == false ){ continue; }

			cout << i << " " << j << endl;
      ans++;
      if ( ans == n * n ){ break; }		
    if ( ans == n * n ){ break; }
  }
 
  return 0;
}


	

Compiler output:
a.cc: In function 'int main()':
a.cc:54:2: error: expected '}' at end of input
   54 | }
      |  ^
a.cc:7:12: note: to match this '{'
    7 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

const int MaxN = 300 + 30;
const int MOD = 1e9 + 7;
const long long INF = 1e18;

int n, d1, d2;

vector <pair<int, int> > badV;

bool used[MaxN * 2][MaxN * 2];

int md, k;

bool cmp(pair<int, int> a, pair<int, int> b)
{
    int p1 = (a.first + k * a.second) % md;
    int p2 = (b.first + k * b.second) % md;

    if(p1 < 0)
        p1 += md;

    if(p2 < 0)
        p2 += md;

    return p1 < p2;
}

vector <pair<int, int> > solve(vector <pair<int, int> > v)
{
    memset(used, 0, sizeof(used));

    vector <pair<int, int> > ans;

    for(auto p : v)
    {
        int i = p.first;
        int j = p.second;
        if(!used[i][j])
        {
            ans.push_back({i, j});
            for(auto x : badV)
            {
                int xx = i + x.first;
                int yy = j + x.second;

                if(xx >= 0 && xx <= n + n && yy >= 0 && yy <= n + n)
                    used[xx][yy] = true;
            }
        }
    }

    return ans;
}

int main()
{
//    freopen("output.txt", "r", stdin);

    ios_base :: sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> d1 >> d2;

    for(int i = 0; i <= n + n; ++i)
        for(int j = -n - n; j <= n + n; ++j)
            if(i * i + j * j == d1 || i * i + j * j == d2)
                badV.push_back({i, j});

    vector <pair<int, int> > ans;

    vector <pair<int, int> > v;

    for(int i = 0; i < n + n; ++i)
        for(int j = 0; j < n + n; ++j)
            v.push_back({i, j});

    vector <pair<int, int> > ans = solve(v);

    if(ans.size() >= n * n)
    {
        ans.resize(n * n);
        for(auto x : ans)
            cout << x.first << ' ' << x.second << '\n';
        return 0;
    }

    for(md = 2; md <= 100; ++md)
        for(k = -1; k <= 1; k += 2)
        {
            sort(v.begin(), v.end(), cmp);

            vector <pair<int, int> > ans = solve(v);

            if(ans.size() >= n * n)
            {
                ans.resize(n * n);
                for(auto x : ans)
                    cout << x.first << ' ' << x.second << '\n';
                return 0;
            }
        }





    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:80:30: error: redeclaration of 'std::vector<std::pair<int, int> > ans'
   80 |     vector <pair<int, int> > ans = solve(v);
      |                              ^~~
a.cc:72:30: note: 'std::vector<std::pair<int, int> > ans' previously declared here
   72 |     vector <pair<int, int> > ans;
      |                              ^~~
Language: C++

#include<cstdio>
#include<cmath>
#include<algorithm>
#include<vector>
#include<utility>
#include<cassert>
using namespace std;
#define maxn 1301
vector<pair<int, int> > d;
bool ban[maxn][maxn], ans[maxn][maxn];
int s[maxn];
int N;
void fil(int i, int j){
	if(i < 0 || i > 4 * N || j < 0 || j >= 2 * N)return;
	ban[i][j] = true;
}
int main(){
	int D1, D2;
	scanf("%d %d %d", &N, &D1, &D2);

	for(int i = 0; i <= 4 * N; i += 1){
		if(i * i > D1) continue;
		int j = sqrt(D1 - i * i);
		if(j * j + i * i == D1)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
		j += 1;
		if(j * j + i * i == D1)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
		j -= 2;
		if(j * j + i * i == D1)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
	}

	for(int i = 0; i <= 4 * N; i += 1){
		if(i * i > D2) continue;
		int j = sqrt(D2 - i * i);
		if(j * j + i * i == D2)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
		j += 1;
		if(j * j + i * i == D2)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
		j -= 2;
		if(j * j + i * i == D2)
			d.push_back({i, j}), d.push_back({i, -j}),
			d.push_back({-i, j}), d.push_back({-i, -j});
	}

	for(int i = 0; i <= 4 * N; i += 1)
		for(int j = 0; j <= 2 * N - 1; j += 1)
			if(ban[i][j] == false){
				ans[i][j] = true;
				for(int k = 0; k < d.size(); k += 1)
					fil(i + d[k].first, j + d[k].second);
			}
	
	for(int i = 0; i <= 4 * N; i += 1)
		for(int j = 0; j <= 2 * N - 1; j += 1){
			s[i] += ans[i][j];
		}
	

	int oi = -1;
	for(int i = 1; i <= 4 * N; i += 1) s[i] += s[i - 1];

	for(int i = 0; i + 2 * N - 1 <= 4 * N; i += 1){
		int sum = s[i + 2 * N - 1];
		if(i) sum -= s[i - 1];
		if(sum >= N * N){
			oi = i;
			break;
		}
	}
	assert(oi != -1);
	vector<p> a;
	int c = 0;
	for(int i = oi; i <= oi + 2 * N - 1 && c != N * N; i += 1)
		for(int j = 0; j <= 2 * N - 1 && c != N * N; j += 1)
			if(ans[i][j]){
				printf("%d %d\n", i - oi, j);
				c += 1;
			}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:79:16: error: 'p' was not declared in this scope
   79 |         vector<p> a;
      |                ^
a.cc:79:17: error: template argument 1 is invalid
   79 |         vector<p> a;
      |                 ^
a.cc:79:17: error: template argument 2 is invalid
Language: C++

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

int n, d1, d2;
vector <pair <int, int> > v1;
vector <pair <int, int> > v2;
vector <pair <int, int> > Sol;
bool f[605][605];
inline void smecherie(int i, int j){
    bool ok = 1;
    for(auto it : v1){
        int x = i - it.first;
        int y = j - it.second;
        if(x >= 0 && y >= 0)
            if(f[x][y]){ok = 0; break ;}

        x = i + it.first;
        y = j + it.second;
        if(x < 2 * n && y < 2 * n)
            if(f[x][y]){ok = 0; break ;}

        x = i - it.first;
        y = j + it.second;
        if(x >= 0 && y < 2 * n)
            if(f[x][y]){ok = 0; break ;}

        x = i + it.first;
        y = j - it.second;
        if(x < 2 * n && y >= 0)
            if(f[x][y]){ok = 0; break ;}

    }
    if(ok == 0) continue ;

    for(auto it : v2){
        int x = i - it.first;
        int y = j - it.second;
        if(x >= 0 && y >= 0)
            if(f[x][y]){ok = 0; break ;}

        x = i + it.first;
        y = j + it.second;
        if(x < 2 * n && y < 2 * n)
            if(f[x][y]){ok = 0; break ;}

        x = i - it.first;
        y = j + it.second;
        if(x >= 0 && y < 2 * n)
            if(f[x][y]){ok = 0; break ;}

        x = i + it.first;
        y = j - it.second;
        if(x < 2 * n && y >= 0)
            if(f[x][y]){ok = 0; break ;}
    }
    if(ok == 0) continue ;
    f[i][j] = 1;
    Sol.push_back({i, j});
}

int main()
{
    scanf("%d%d%d", &n, &d1, &d2);
    for(int i = 0; i <= sqrt(d1); ++i){
        int x = i * i;
        int y = d1 - i * i;
        int rad = sqrt(y);
        if(rad * rad == y) v1.push_back({sqrt(x), sqrt(y)}), v1.push_back({sqrt(y), sqrt(x)});
    }
    for(int i = 0; i <= sqrt(d2); ++i){
        int x = i * i;
        int y = d2 - i * i;
        int rad = sqrt(y);
        if(rad * rad == y) v2.push_back({sqrt(x), sqrt(y)}), v2.push_back({sqrt(y), sqrt(x)});
    }
    for(int k = 1; k <= n ; ++k){
        int i = k;
        for(int j = k; j <= 2 * n - k + 1 ; ++j)
            smecherie(i, j);
        i = 2 * n - k + 1;
        for(int j = k; j <= 2 * n - k + 1 ; ++j)
            smecherie(i, j);

        int j = k;
        for(int i = k; i <= 2 * n - k + 1 ; ++i)
            smecherie(i, j);
        j = 2 * n - k + 1;
        for(int i = k; i <= 2 * n - k + 1 ; ++i)
            smecherie(i, j);
    }
    for(int i = 0; i < n * n ; ++i)
        printf("%d %d\n", Sol[i].first, Sol[i].second);
    return 0;
}


Compiler output:
a.cc: In function 'void smecherie(int, int)':
a.cc:33:17: error: continue statement not within a loop
   33 |     if(ok == 0) continue ;
      |                 ^~~~~~~~
a.cc:56:17: error: continue statement not within a loop
   56 |     if(ok == 0) continue ;
      |                 ^~~~~~~~
Language: C++

#include <iostream>
#include <math.h>
#include <algorithm>
#include <vector>
#include <numeric>
#include <string>
using namespace std;
const double PI = acos(-1.0);
const string alp = "abcdefghijklmnopqrstuvwxyz";
const string ALP = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define REP1(i,n) FOR(i,1,n+1)
#define SUM(c) accumulate((c).begin(),(c).end(),0)
#define UNIQ(c) (c).erase(unique((c).begin(), (c).end()), (c).end());
#define Yn(b) puts(b?"Yes":"No")
#define YN(b) puts(b?"YES":"NO")
 
bool isprime(int p) {
  if (p==1) return false;
  FOR(i,2,p) {
    if (p%i==0) return false;
  }
  return true;
}

int main(){
  int n,d1,d2,bx[1000],by[1000],e;
  bool c[600][600];
  e=0;
  cin >> n >> d1 >> d2;
  REP(i,d1+1){
    REP(j,d1+1){
      if(i*i+j*j==d1){
        bx[e]=i;
        by[e]=j;
        e++;
      }
      if (j*j>d1) j=d1;
    }
    if (i*i>d1) i=d1;
  }
  REP(i,d2+1){
    REP(j,d2+1){
      if(i*i+j*j==d2){
        bx[e]=i;
        by[e]=j;
        e++;
      }
      if (j*j>d2) j=d2;
    }
    if (i*i>d2) i=d2;
  }
  REP(i,2*n){
    REP(j,2*n){
      c[i][j]=true;
    }
  }
  REP(o,2*n){
  REP(l,2*n){
  int m=0;
  REP(i,2*n){
    REP(j,2*n){
      if (c[i][j]) {
        cout << i << " " << j << endl;
        m++;
        if (m==n*n) return 0;
        REP(k,e){
          if (2*n>i+bx[k]) {
            if (2*n>j+by[k]) {
              c[i+bx[k]][j+by[k]]=false;
            }
            if (0<=j-by[k]) {
              c[i+bx[k]][j-by[k]]=false;
            }
          }
          if (0<=i-bx[k]) {
            if (2*n>j+by[k]) {
              c[i-bx[k]][j+by[k]]=false;
            }
            if (0<=j-by[k]) {
              c[i-bx[k]][j-by[k]]=false;
            }
          }
        }
      }
      j+=l;
    }
    i+=o;
  }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:95:2: error: expected '}' at end of input
   95 | }
      |  ^
a.cc:29:11: note: to match this '{'
   29 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

constexpr int N = 3e5 + 10;
constexpr int M = 310;
constexpr int MOD = 998244353;

mtom_device rd;
mt19937 mt(rd());

long long n, sq[N], d1, d2;
vector <pair <int, int>> v, ans, p;
bool is[N], in[2 * M][2 * M];

bool valid (int x) {
    if (x >= 0 && x < 2 * n)
        return true;
    return false;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n >> d1 >> d2;
    for (int i = 0; i * i < N; i++)
        is[i * i] = true, sq[i * i] = i;
    for (int i = 0; i <= d1; i++) {
        if (is[i] && is[d1 - i]) {
            v.push_back ({sq[i], sq[d1 - i]});
            v.push_back ({sq[i], -sq[d1 - i]});
            v.push_back ({-sq[i], sq[d1 - i]});
            v.push_back ({-sq[i], -sq[d1 - i]});
        }
    }
    for (int i = 0; i <= d2; i++) {
        if (is[i] && is[d2 - i]) {
            v.push_back ({sq[i], sq[d2 - i]});
            v.push_back ({-sq[i], sq[d2 - i]});
            v.push_back ({sq[i], -sq[d2 - i]});
            v.push_back ({-sq[i], -sq[d2 - i]});
        }
    }
    while (1000.0 * clock() / CLOCKS_PER_SEC < 1500) {
        p.clear();
        for (int i = 0; i < 2 * n; i++)
            for (int j = 0; j < 2 * n; j++)
                p.push_back ({i, j});
        while ((int)ans.size() != (n * n) && (int)p.size()) {
            int id = mt() % ((int)p.size());
            if (id < 0)
                id = -id;
            int i = p[id].first;
            int j = p[id].second;
            bool can = true;
            for (auto k : v) {
                if (valid (i + k.first) && valid (j + k.second) && in[i + k.first][j + k.second])
                    can = false;
                if (!can)
                    break;
            }
            if (can) {
                ans.push_back ({i, j});
                in[i][j] = true;
            }
            swap (p[id], p.back());
            p.pop_back();
        }
        if ((int)ans.size() == n * n)
            break;
        ans.clear();
    }
    for (int i = 0; i < n * n; i++)
        cout << ans[i].first << ' ' << ans[i].second << '\n';
    return 0;
}


Compiler output:
a.cc:9:1: error: 'mtom_device' does not name a type
    9 | mtom_device rd;
      | ^~~~~~~~~~~
a.cc:10:12: error: 'rd' was not declared in this scope
   10 | mt19937 mt(rd());
      |            ^~
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <algorithm>
#include <utility>
#include <queue>
#include <set>
#include <map>
#include <deque>
#include <iomanip>
#include <cstdio>

using namespace std;
typedef  long long ll;
typedef pair<int,int> PII;
typedef vector<int> VI;
typedef vector<VI> VVI;
#define  MP make_pair
#define  PB push_back
#define inf  1000000007
#define rep(i,n) for(int i=0;i<(int)(n);++i)

template<typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val){
    std::fill( (T*)array, (T*)(array+N), val );
}
random_device rnd;
mt19937 mt(rnd());
uniform_int_distribution<> rand5(-2, 5);
int main(){
    int n,a,b;
    cin >> n >> a >> b;
    vector<pair<int,int> > p;
    for(int i=-n;i<n;i++){
        for(int j=-n;j<=n;j++){
            if(i*i+j*j==a||i*i+j*j==b){
                p.push_back(MP(i,j));
            }
        }
    }
    bool s[2000][2000];
    int cnt = 0;
    vector<pair<int,int> > ans;
    for(int i=400;i<400+2*n;i++){
        for(int j=400;j<400+2*n;j++){
            if(s[i][j]==0){
                ans.PB(MP(i,j));
                cnt++;
                if(cnt==n*n)break;
                for(auto x:p){
                    s[i+x.first][j+x.second] = 1;
                }
            }
        }
        if(cnt==n*n)break;
    }
    if(cnt!=n*n){
        while(1){
            bool s2[2000][2000];
            int cnt2 = 0;
            vector<pair<int,int> > ans2;
            int xx = 400,yy=400;
            
            int counter_max = 50*n*n;
            int counter = 0;
            while(counter < counter_max){
                int aa = rand5(mt);
                int bb = rand5(mt);
                xx = 400+aa;
                yy = 400+bb;
                if(xx>400+2*n){
                    xx -= 2*n;
                }
                if(yy>400+2*n){
                    yy -= 2*n;
                }
                if(s[xx][yy]==0){
                    ans2.PB(MP(xx,yy));
                    cnt2++;
                if(cnt2==n*n)break;
                    for(auto x:p){
                        s[xx+x.first][yy+x.second] = 1;
                    }
                }
                counter++;
            }
            
            if(cnt2==n*n){
                ans = ans2;
                break;
            }
        }
    }
    for(auto x:ans){
        cout << x.first-400 << " "<< x.second -400 << endl;
    }
    return 0;
}

Compiler output:
a.cc:28:1: error: 'random_device' does not name a type; did you mean 'random_data'?
   28 | random_device rnd;
      | ^~~~~~~~~~~~~
      | random_data
a.cc:29:1: error: 'mt19937' does not name a type
   29 | mt19937 mt(rnd());
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:68:32: error: 'mt' was not declared in this scope; did you mean 'tm'?
   68 |                 int aa = rand5(mt);
      |                                ^~
      |                                tm
Language: C++

//ProblemC

//#define USE_STDIO
//#define USE_LOG
//#define FILE_ERR

#ifdef _MYPC
#include "mypc.h"
#endif // _MYPC

#ifndef debug
#define debug(...)
#endif // !LOG

//include
#include <iostream>
#include <string>
#include <vector>
#include <bitset>
#include <list>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <queue>
#include <stack>
#include <algorithm>
#include <numeric>
#include <functional>
#include <memory>
#include <complex>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <iomanip>

using namespace std;

//for
#define forn(i, n) for(int i = 0; i < (int)(n); i++)
#define forbe(i, begin, end) for(decltype(begin) i = (begin); i != (end); ++i)
#define forbes(i, begin, end, step) for(decltype(begin) i = (begin); i != (end); i += (step))

//int
using ll = long long;
using ull = unsigned long long;
using uint = unsigned;

//pair
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;
#define fi first
#define se second

//vector
template <typename Value>
static inline void fillv(Value& x, const Value& val) { x = val; }
template <typename Vector, typename Value>
static inline void fillv(Vector& v, const Value& val) { for (auto& x : v) fillv(x, val); }

static inline void Solve();

int main(int argc, char* argv[]) {
#ifdef REDIRECT_STDIO
	REDIRECT_STDIO;
#endif // REDIRECT_STDIO

	Solve();
	return 0;
}

vector<pii> solve(int d) {
	vector<pii> ans;
	for (int i = 0; i <= int(sqrt(d)); i++) {
		int j = int(sqrt(d - i * i));
		if (i * i + j * j == d) {
			ans.push_back({ i, j });
		}
	}
	return ans;
}

template<> struct hash<pii> {
	typedef pii argument_type;
	typedef std::size_t result_type;
	result_type operator()(argument_type const& s) const noexcept
	{
		return std::hash<int>()(s.first) ^ std::hash<int>()(s.second);
	}
};

//ProblemC
void Solve() {
	int n, d1, d2;
	cin >> n >> d1 >> d2;

	auto s1 = solve(d1);
	auto s2 = solve(d2);

	unordered_set<pii> ng;
	vector<pii> ans;
	for(int i = 0; i < 2 * n && (int)ans.size() < n * n; i++) 
		for (int j = 0; j < 2 * n  && (int)ans.size() < n * n; j++) {
			pii p{ i, j };
			if (ng.find(p) == ng.end()) {
				ans.push_back(p);
				for (auto &z : s1) {
					int xng = i + z.first;
					int yng = j + z.second;
					if (xng < 2 * n && yng < 2 * n) {
						ng.insert({ xng, yng });
					}

					xng = i - z.first;
					yng = j - z.second;
					if (xng >=0 && yng >= 0) {
						ng.insert({ xng, yng });
					}
				}
				for (auto &z : s2) {
					int xng = i + z.first;
					int yng = j + z.second;
					if (xng < 2 * n && yng < 2 * n) {
						ng.insert({ xng, yng });
					}

					xng = i - z.first;
					yng = j - z.second;
					if (xng >= 0 && yng >= 0) {
						ng.insert({ xng, yng });
					}
				}
			}
		}
	for (auto& a : ans) {
		cout << a.first << ' ' << a.second << '\n';
	}
	cout << flush;
}


Compiler output:
a.cc:83:19: error: explicit specialization of 'template<class _Tp> struct std::hash' outside its namespace must use a nested-name-specifier [-fpermissive]
   83 | template<> struct hash<pii> {
      |                   ^~~~~~~~~
Language: C++

#include <bits/stdc++.h> 
 
using namespace std;
 
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}
 
 
//typedef
//------------------------------------------
typedef pair<int, int> PII;
typedef long long LL;
typedef pair<long, long> PLL;
 
//container util
//------------------------------------------
#define PB emplace_back
#define MP make_pair 
#define SZ(a) int((a).size())
//repetition
//------------------------------------------
#define FOR(i,a,b) for(LL i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)
#define SORT(c) sort((c).begin(),(c).end())
//constant
//--------------------------------------------
//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

const double EPS=1e-10;

int mp[602][602];
int main(){
    int N,D1,D2;
    cin>>N>>D1>>D2;
    if(N<=D1){
        REP(i,N)REP(j,N)res.PB(MP(i,j));
    }else if(D2<4){
        REP(i,N)REP(j,N)res.PB(MP(2*i,2*j));
    }else{
        if(D1==D2||D2>=N){
            for(LL i=0;i<2*N/D1+1;i+=2)for(LL j=0;j<2*N/D1+1;j+=2){
                LL stx=i*D1,sty=j*D1;
                REP(x,D1)REP(y,D1){
                   res.PB(MP(stx+x,sty+y)); 
                }
            }
        }else{
            while(1);
        }
    }
    REP(i,N*N){
        cout<<res[i].first<<" "<<res[i].second<<endl;
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:25: error: 'res' was not declared in this scope
   36 |         REP(i,N)REP(j,N)res.PB(MP(i,j));
      |                         ^~~
a.cc:38:25: error: 'res' was not declared in this scope
   38 |         REP(i,N)REP(j,N)res.PB(MP(2*i,2*j));
      |                         ^~~
a.cc:44:20: error: 'res' was not declared in this scope
   44 |                    res.PB(MP(stx+x,sty+y));
      |                    ^~~
a.cc:52:15: error: 'res' was not declared in this scope
   52 |         cout<<res[i].first<<" "<<res[i].second<<endl;
      |               ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define pa pair<int,int>
int n,d1,d2,cnt;
vector<pa> ban;
bool vis[2333][2333];
int main(){
	scanf("%d%d%d",&n,&d1,&d2);
	for (int i=0;i<2*n;i++){
		int rest=d1-i*i;
		if (rest>=0){
			int y=floor(sqrt(rest)+1e-9);
			if (i*i+y*y==d1&&y<2*n) ban.push_back(pa(i,y));
		}
		rest=d2-i*i;
		if (rest>=0){
			int y=floor(sqrt(rest)+1e-9);
			if (i*i+y*y==d2&&y<2*n) ban.push_back(pa(i,y));
		}
	}
	for (int i=0;i<2*n;i++)
		for (int j=0;j<2*n;j++)
			if (!vis[i][j]){
				if ((rand()*32768+rand()%10000)==0) continue;
				cnt++;
				printf("%d %d\n",i,j);
				if (cnt>=n*n) exit(0);
				for (int k=0;k<ban.size();k++){
					vis[i+ban[k].first][j+ban[k].second]=1;
					if (j>=ban[k].second)
						
						vis[i+ban[k].first][j-ban[k].second]=1;
				}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:2: error: expected '}' at end of input
   34 | }
      |  ^
a.cc:7:11: note: to match this '{'
    7 | int main(){
      |           ^
Language: C++

#include <cstring>
#include <cstdint>
#include <iostream>
#include <string>
#include <memory>
#include <queue>
#include <stack>
#include <limits>
#include <list>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <utility>
#include <sstream>
#include <random>
#include <functional>
#include<algorithm>
#include <array>
#include<random>
using namespace std;

int main() {
	uint64_t N,D1,D2;
	cin >> N >> D1 >> D2;
	struct Phash{
		size_t operator() (const pair<uint64_t, uint64_t>& p) const{
			hash<uint64_t> h;
			return (h(p.first) & h(p.second));
		}
	};
	unordered_set< pair<uint64_t, uint64_t>, Phash>offsList;
	for (uint64_t i = 0; i  < 2 * N ; i++)
	{
		for (uint64_t j = 0; j < 2 * N; j++)
		{
			if (D1 == i * i + j * j)offsList.insert(make_pair<>(i, j));
			if (D2 == i * i + j * j)offsList.insert(make_pair<>(i, j));
		}
	}
	uint64_t c = 0;
	vector<bool>bannedPos(4 * N * N);
	for (auto& v: bannedPos)
	{
		v = false;
	}
	auto banPos = [&](uint64_t x, uint64_t y)->void {
		if (x >= 2 * N)return;
		if (y >= 2 * N)return;
		bannedPos[x + y * 2 * N] = true;
	};
	auto isBanned = [&](uint64_t x, uint64_t y)->bool {
		return bannedPos[x + y * 2 * N];
	};
	for (uint64_t i = 0; i < 2 * N; i++)
	{
		for (uint64_t j = 0; j < 2 * N; j++)
		{
			if (isBanned(i, j)) continue;
			else {
				for (auto n : offsList) {
					banPos(i + n.first, j + n.second);
				}
				cout << i << " " << j << endl;
				++c;
				if (c == N * N)goto END;
			}
		}
	}
END:
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:43:23: error: cannot bind non-const lvalue reference of type 'std::_Bit_reference&' to an rvalue of type 'std::_Bit_iterator::reference'
   43 |         for (auto& v: bannedPos)
      |                       ^~~~~~~~~
Language: C++

#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define per(i,a,b) for(int i=(a);i>=(b);i--)
#define REP(i,n) for(int i=0;i<(n);i++)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define lc (o<<1)
#define rc (o<<1|1)
#define mid ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef long long ll;
typedef double ld;

template<class T> inline void read(T &x){
	int f=0;x=0;char ch=getchar();
	for(;!isdigit(ch);ch=getchar())f|=(ch=='-');
	for(;isdigit(ch);ch=getchar())x=x*10+ch-'0';
	if(f)x=-x;
}

const int N=2005;
int fa[N],d[N],pa[N],w[N];
int u[N],v[N],n,m,a,b,ans;
vector<pii> id[N];
vi e[N];

void dfs(int u){
	for(auto v:e[u])
		if(v!=fa[u]){
			fa[v]=u;
			d[v]=d[u]+1;
			dfs(v);
		}
}

int getpa(int x){
	if(pa[x]==x)return x;
	int p=getpa(pa[x]);
	return w[x]^=w[pa[x]],p;
}

int main(){
	read(n),read(m);
	rep(i,1,n-1){
		read(a),read(b);
		e[a].pb(b),e[b].pb(a);
	}
	d[1]=1,dfs(1);
	rep(i,1,m){
		read(u[i]),read(v[i]),pa[i]=i;
		int x=u[i],y=v[i];
		if(d[x]>d[y]){
			while(d[x]>d[y])
				id[x].pb(mp(i,0)),x=fa[x];
		}
		else{
			while(d[y]>d[x])
				id[y].pb(mp(i,1)),y=fa[y];
		}
		while(x!=y){
			id[x].pb(mp(i,0)),x=fa[x];
			id[y].pb(mp(i,1)),y=fa[y];
		}
	}
	rep(i,2,n)for(int k=0;k+1<id[i].size();k++)
		if(getpa(id[i][k].fi)!=getpa(id[i][k+1].fi)){
			int a=id[i][k].fi,x=getpa(a);
			int b=id[i][k+1].fi,y=getpa(b);
			w[y]=w[a]^w[b]^id[i][k].se^id[i][k+1].se^1;
			pa[y]=x;
		}
	rep(i,2,n){
		int A=0,B=0;
		REP(k,id[i].size()){
			getpa(id[i][k]);
			A|=!(w[id[i][k].fi]^id[i][k].se),
			B|=w[id[i][k].fi]^id[i][k].se;
		}
		ans+=A+B;
	}
	printf("%d\n",ans);
	rep(i,1,m)
		if(w[i])printf("%d %d\n",v[i],u[i]);
		else printf("%d %d\n",u[i],v[i]);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:79:30: error: cannot convert '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> >, std::pair<int, int> >::value_type' {aka 'std::pair<int, int>'} to 'int'
   79 |                         getpa(id[i][k]);
      |                         ~~~~~^~~~~~~~~~
      |                              |
      |                              __gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> >, std::pair<int, int> >::value_type {aka std::pair<int, int>}
a.cc:40:15: note:   initializing argument 1 of 'int getpa(int)'
   40 | int getpa(int x){
      |           ~~~~^
Language: Java

//Meet Arora 2016055

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.util.*;
import java.awt.Point;

class Reader {
    static BufferedReader reader;
    static StringTokenizer tokenizer;

    /**
     * call this method to initialize reader for InputStream
     */
    static void init(InputStream input) {
        reader = new BufferedReader(
                new InputStreamReader(input));
        tokenizer = new StringTokenizer("");
    }

    /**
     * get next word
     */
    static String next() throws IOException {
        while (!tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(
                    reader.readLine());
        }
        return tokenizer.nextToken();
    }

    static int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    static double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }
}

public class Main {
	public static void bitwise_and(int[] a, int[] b, int[] temp) {
		for(int i=0;i<32;i++) {
			if(a[i]==0 || b[i]==0)
				temp[i] = 0;
			else
				temp[i] = 1;
		}
	}

	public static void bitwise_sum(int[] a, int[] temp) {
		int carry = 0;

		for(int i=31;i>=0;i--) {
			int sum = a[i] + temp[i] + carry;
			if (sum==2) {
				a[i] = 0;
				carry = 1;
			}
			else if(sum==3) {
				a[i]=1;
				carry = 1;
			}
			else if(sum==1) {
				a[i]=1;
				carry =0;
			}
			else if(sum==0) {
				a[i]=0;
				carry=0;
			}
		}
	}

	public static void main(String[] args) throws IOException {
		Reader.init(System.in);
		int n=Reader.nextInt();
		int m = Reader.nextInt();
		int k = Reader.nextInt();
		String s = Reader.next();
		String t = Reader.next();

		char[] a = s.toCharArray();
		char[] b = t.toCharArray();

		int[] ai = new int[32];
		int[] bi = new int[32];
		int[] temp = new int[32];

		for(int i=0;i<n;i++) {
			ai[31-i] = (int)a[n-1-i];
		}
		for(int i=0;i<m;i++) {
			bi[31-i] = (int)b[m-1-i];
		}

		for(int i= 0;i<k;i++) {
			bitwise_and(ai, bi, temp);
			bitwise_sum(ai, temp);
			bitwise_sum(bi, temp);
		}

		String s_a = "";
		String s_b = "";

		int flag = 0;
		for(int i=0;i<32;i++) {
			if(ai[i]==1)
				flag = 1;
			if (flag==1)
				s_a+=(String)ai[i];
		}

		 flag = 0;
		for (int i = 0; i < 32; i++) {
			if (bi[i] == 1)
				flag = 1;
			if (flag == 1)
				s_b += (String) bi[i];
		}

		System.out.println(s_a);
		System.out.println(s_b);
	}
}

Compiler output:
Main.java:113: error: incompatible types: int cannot be converted to String
				s_a+=(String)ai[i];
				               ^
Main.java:121: error: incompatible types: int cannot be converted to String
				s_b += (String) bi[i];
				                  ^
2 errors
Language: Java

//Meet Arora 2016055

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.util.*;
import java.awt.Point;

class Reader {
    static BufferedReader reader;
    static StringTokenizer tokenizer;

    /**
     * call this method to initialize reader for InputStream
     */
    static void init(InputStream input) {
        reader = new BufferedReader(
                new InputStreamReader(input));
        tokenizer = new StringTokenizer("");
    }

    /**
     * get next word
     */
    static String next() throws IOException {
        while (!tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(
                    reader.readLine());
        }
        return tokenizer.nextToken();
    }

    static int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    static double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }
}

public class Main {
	public static bitwise_and(int[] a, int[] b, int[] temp) {
		for(int i=0;i<32;i++) {
			if(a[i]==0 || b[i]==0)
				temp[i] = 0;
			else
				temp[i] = 1;
		}
	}

	public static bitwise_sum(int[] a, int[] temp) {
		int carry = 0;

		for(int i=31;i>=0;i--) {
			int sum = a[i] + temp[i] + carry;
			if (sum==2) {
				a[i] = 0;
				carry = 1;
			}
			else if(sum==3) {
				a[i]=1;
				carry = 1;
			}
			else if(sum==1) {
				a[i]=1;
				carry =0;
			}
			else if(sum==0) {
				a[i]=0;
				carry=0;
			}
		}
	}

	public static void main(String[] args) throws IOException {
		Reader.init(System.in);
		int n=Reader.nextInt();
		int m = Reader.nextInt();
		int k = Reader.nextInt();
		String s = Reader.next();
		String t = Reader.next();

		char[] a = s.toCharArray();
		char[] b = t.toCharArray();

		int[] ai = new int[32];
		int[] bi = new int[32];
		int[] temp = new int[32];

		for(int i=0;i<n;i++) {
			ai[31-i] = (int)a[n-1-i];
		}
		for(int i=0;i<m;i++) {
			bi[31-i] = (int)b[m-1-i];
		}

		for(int i= 0;i<k;i++) {
			bitwise_and(ai, bi, temp);
			bitwise_sum(ai, temp);
			bitwise_sum(bi, temp);
		}

		String s_a = "";
		String s_b = "";

		int flag = 0;
		for(int i=0;i<32;i++) {
			if(ai[i]==1)
				flag = 1;
			if (flag==1)
				s_a+=(String)ai[i];
		}

		 flag = 0;
		for (int i = 0; i < 32; i++) {
			if (bi[i] == 1)
				flag = 1;
			if (flag == 1)
				s_b += (String) bi[i];
		}

		System.out.println(s_a);
		System.out.println(s_b);
	}
}

Compiler output:
Main.java:44: error: invalid method declaration; return type required
	public static bitwise_and(int[] a, int[] b, int[] temp) {
	              ^
Main.java:53: error: invalid method declaration; return type required
	public static bitwise_sum(int[] a, int[] temp) {
	              ^
2 errors
Language: C++

#include <iostream>
#include <map>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <sstream>
#include <cmath>
#include <math.h>
#include <string>
#include <set>
#include <queue>
#include <utility>
using namespace std;
typedef long long ll;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a , b;
    cin >> a >> b;
    cout << max( a + b , max( a - b , a / b ))
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:47: error: expected ';' before '}' token
   21 |     cout << max( a + b , max( a - b , a / b ))
      |                                               ^
      |                                               ;
   22 | }
      | ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int A,B;
  cin >> A >> B;
  if(B>0){
    if(A+B>=A*B){
    cout << A+B << endl;
    }
    else{
    cout << A*B << endl;
    }
  }
  else(B<0){
    if(A-B>=A*B){
    cout << A-B << endl;
    }
    else{
    cout << A*B << endl;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:12: error: expected ';' before '{' token
   15 |   else(B<0){
      |            ^
      |            ;
Language: C++

#include<cstdio>
#include<algorithm>
using namespace std;
int main(void)
{
	int a,b,m[3];
	scanf("%d %d",&a,&b);
	for(i=0;i<3;i++){
		m[0]=a+b;
		m[1]=a-b;
		m[2]=a*b;
	}
	sort(m,m+3);
	printf("%d\n",m[2]);
	return 0;
}
	

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'i' was not declared in this scope
    8 |         for(i=0;i<3;i++){
      |             ^
Language: C++

#include <bits/stdc++.h>
#include <iostream>
#include <string>
#include <string.h>
#include <ctype.h>
#include <algorithm>

using namespace std;

int main() {
  int a,b;
  cin >> a >> b;
  if(a+b > a-b) {
      if(a+b > a*b) cout << a+b << endl;
      else cout << a*b << endl;
  }
  else {
      if(a-b > a*b) cout << a-b << endl;
      else cout << a*b << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:2: error: expected '}' at end of input
   20 | }
      |  ^
a.cc:10:12: note: to match this '{'
   10 | int main() {
      |            ^
Language: C++

#include <bits\stdc++.h>
using namespace std;
int main() {
  int a,b;
  cin >> a >> b;
  int ans = max({a+b,a-b,a*b});
  cout << ans << endl;
}

Compiler output:
a.cc:1:10: fatal error: bits\stdc++.h: No such file or directory
    1 | #include <bits\stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
using namespace std;
int main()
{
  int a,b;
  cin>>a>>b;
  if (a*b>a+b && a*b>a-b){
    cout<<a*b;
  }else if (a+b>a*b && a+b>a-b){
    cout<<a+b;
  }else (a-b>a*b && a-b>a+b){
    cout<<a-b;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:29: error: expected ';' before '{' token
   11 |   }else (a-b>a*b && a-b>a+b){
      |                             ^
      |                             ;
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int x,y;
  cin>>x>>y;
  cout<<max(max(a+b,a-b),max(a+b,a*b))<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: 'a' was not declared in this scope
    6 |   cout<<max(max(a+b,a-b),max(a+b,a*b))<<endl;
      |                 ^
a.cc:6:19: error: 'b' was not declared in this scope
    6 |   cout<<max(max(a+b,a-b),max(a+b,a*b))<<endl;
      |                   ^
Language: C++

#include<bits/atdc++.h>
using namespace std;
int main(){
  int x,y;
  cin>>x>>y;
  cout<<max(max(a+b,a-b),max(a+b,a*b))<<endl;
}

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

#include <iostream>

using namespace std;

int main()
{
    int A , B;
    cin >> A >> B;
    if ((A + B) >= (A - B) && (A * B)) {cout << A + B;}
    else if ((A - B) >= (A + B) && (A * B)) {cout << A - B;}
    else if ((A * B) >= (A - B) && (A + B)) {cout << A * B;}
    else if ((A + B) = (A * B) = (A - B)) {cout << A + B;}
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:27: error: lvalue required as left operand of assignment
   12 |     else if ((A + B) = (A * B) = (A - B)) {cout << A + B;}
      |                        ~~~^~~~
Language: C++

#include <iostream>

using namespace std;

int main()
{
    int A , B;
    cin >> A >> B;
    if ((A + B) >= (A - B) && (A * B)) {cout << A + B;}
    else if ((A - B) >= (A + B) && (A * B)) {cout << A - B;}
    else if ((A * B) >= (A - B) && (A + B)) {cout << A * B;}
    else if ((A + B) = (A * B) = (A - B)) {cout << A + B}
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:27: error: lvalue required as left operand of assignment
   12 |     else if ((A + B) = (A * B) = (A - B)) {cout << A + B}
      |                        ~~~^~~~
a.cc:12:57: error: expected ';' before '}' token
   12 |     else if ((A + B) = (A * B) = (A - B)) {cout << A + B}
      |                                                         ^
      |                                                         ;
Language: C++

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

int main() {
  int a, b;
  cin >> a >> b;

  int ans = max(a+b, a-b);
  ans = max(ans, a*b)
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:22: error: expected ';' before 'cout'
    9 |   ans = max(ans, a*b)
      |                      ^
      |                      ;
   10 |   cout << ans << endl;
      |   ~~~~
Language: C++

#include <iostream>

using namespace std;

int A, B;
int X, Y, I;

int main()
{

    cin >> A;
    cin >> B;

    X = A + B;
    Y = A - B;
    I = A * B;
    if ((X > Y)&&(X > I))
    {
        cout << X << endl;
    }
    else if ((Y > X)&&(Y > I))
    {
    cout << Y << endl;
    }
    else if ((I > X)&&(I > Y))
    {
    cout << I << endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:28:6: error: expected '}' at end of input
   28 |     }
      |      ^
a.cc:9:1: note: to match this '{'
    9 | {
      | ^
Language: C++

#include <iostream>

using namespace std;

int A, B;
int X, Y, I;

int main()
{

    cin >> A;
    cin >> B;

    X = A + B;
    Y = A - B;
    I = A * B;
    if ((X > Y)&&(X > I))
    {
        cout << X << endl;

    }
else if ((Y > X)&&(Y > I))
{
    cout << Y << endl;
}
else if ((I > X)&&(I > Y))
{
    cout << I << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:2: error: expected '}' at end of input
   29 | }
      |  ^
a.cc:9:1: note: to match this '{'
    9 | {
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a,b; cin >> a >> b;
  cout << max(a + b,max(a*b,a-b))
}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:34: error: expected ';' before '}' token
    5 |   cout << max(a + b,max(a*b,a-b))
      |                                  ^
      |                                  ;
    6 | }
      | ~
Language: C++

/*
      author : nishi5451
      created: 11.08.2020 20:24:28
*/

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<n; i++)
typedef long long ll;


int main(){
    int a,b;
    cin >> a >> b;
    cout << max(a+b,a-b,a*b) << endl;
    return 0;
}

Compiler output:
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:6:
/usr/include/c++/14/bits/stl_algobase.h: In instantiation of 'constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare) [with _Tp = int; _Compare = int]':
a.cc:15:16:   required from here
   15 |     cout << max(a+b,a-b,a*b) << endl;
      |             ~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:306:17: error: '__comp' cannot be used as a function
  306 |       if (__comp(__a, __b))
      |           ~~~~~~^~~~~~~~~~
Language: C++

//0^1=1,1^0=1,0^0=0,1^1=0
//0+1=1,1+0=1,0+0=0,1+1=0 (but I want to carry in)
// Can be seen a ^ b <= a + b (if and only when a, b binary can not have one with the same 1);
//n number satisfies the condition, and any number of n numbers can satisfy the condition.
// Find the farthest r so that the number between [l, r] satisfies the problem condition. Then [l+1, r] must satisfy the condition. So the optimal solution for l+1 >= r;
// Meet the ruler method requirements. a ^ b = c then b = a ^ c (anyway, change).
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<iostream>
#define m(a,b) memset(a,b,sizeof a)
#define en '\n'
using namespace std;
typedef long long ll;
const int N=2e5+5;
int a[N];
int main()
{
    int n;scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);
    int l=1,r=1,tmp=0;ll sum=0;
    while(r<=n)// enumerate l to find the best r.
    {
        while((a[r]^tmp)==(a[r]+tmp)&&r<=n)
            tmp^=a[r],r++;
        if(r!=n+1)
            sum+=r-l;/ / respectively refers to the interval [l, r-1], [l + 1, r-1], [l + 2, r-1] .... [r-1, r-1].
        else
            sum+=(ll)(r-l)*(ll)(r-l+1)/(ll)2;//Because r==n+, you have to break, so you can't just use l as the starting point to expand to r-1. You should also start from l+1, l+2...r-1, so sum+=r -l+r-(l+1)+r-(l+2)+...+r-(r-1).
        tmp^=a[l],l++;The value of //tmp removes the exclusive or a[l], and the right shifts.
    }
    printf("%lld\n",sum);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:22: error: expected primary-expression before '/' token
   28 |             sum+=r-l;/ / respectively refers to the interval [l, r-1], [l + 1, r-1], [l + 2, r-1] .... [r-1, r-1].
      |                      ^
a.cc:28:24: error: expected primary-expression before '/' token
   28 |             sum+=r-l;/ / respectively refers to the interval [l, r-1], [l + 1, r-1], [l + 2, r-1] .... [r-1, r-1].
      |                        ^
a.cc:28:26: error: 'respectively' was not declared in this scope
   28 |             sum+=r-l;/ / respectively refers to the interval [l, r-1], [l + 1, r-1], [l + 2, r-1] .... [r-1, r-1].
      |                          ^~~~~~~~~~~~
a.cc:31:23: error: 'The' was not declared in this scope
   31 |         tmp^=a[l],l++;The value of //tmp removes the exclusive or a[l], and the right shifts.
      |                       ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)n;i++)
int main(){
	int a,b;cin>>a>>b;
	cout<<max(a+b,a-b,a*b)<<endl;
}


Compiler output:
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: In instantiation of 'constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare) [with _Tp = int; _Compare = int]':
a.cc:6:11:   required from here
    6 |         cout<<max(a+b,a-b,a*b)<<endl;
      |               ~~~^~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:306:17: error: '__comp' cannot be used as a function
  306 |       if (__comp(__a, __b))
      |           ~~~~~~^~~~~~~~~~
Language: C

#include<stdio.h>
#include<conio.h>
int main()
{
    int a,b;
    scanf("%d %d",&a,&b);
    if((a+b)>(a*b) && (a+b)>(a-b))
    {
        printf("%d",(a+b));
    }
    else if((a-b)>(a+b) && (a-b)>(a*b))
    {
        printf("%d",(a-b));
    }
    else if((a*b)>(a+b) && (a*b)>(a-b))
    {
        printf("%d",(a*b));
    }
    else
    {
        printf("0");
    }
return 0;
}

Compiler output:
main.c:2:9: fatal error: conio.h: No such file or directory
    2 | #include<conio.h>
      |         ^~~~~~~~~
compilation terminated.