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

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
typedef long double ld;
typedef unsigned long long ull;
#define X first
#define Y second
#define mp make_pair
template<class T> using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T, class X> using indexed_map = tree<T, X, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int M = 1e9+7;
const double PI = acos(-1.0);
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int modpow(int n, int k, int MOD);

/**************** code starts here ****************/

int n;
int maxdist, maxnode;
vector<vector<int>> adj(100001);
vector<int> dist(100001);
 
void dfs(int now, int prev) {
	dist[now] = dist[prev] + 1;
	if (dist[now] > dist[maxnode]) maxnode = now;
 
	for (auto u: adj[now]) {
		if (u != prev) dfs(u, now);
	}
}

void poppingfever() {
	cin >> n;
	for (int i = 1; i < n; i++) {
		int x, y;
		cin >> x >> y;
		adj[x].push_back(y);
		adj[y].push_back(x);
	}
	dfs(1, 0);
	dfs(maxnode, 0);
 
	cout << (dist[maxnode] + 1) / 2;

/**************************************************/

signed main() {
	#ifdef fastfurioustransform
	freopen("inp.txt", "r", stdin);
	freopen("out.txt", "w", stdout);
	#endif
 
	//ios::sync_with_stdio(0); cin.tie(0);
	//cout << fixed << setprecision(12);
 
	poppingfever();
 
	return 0;
}

int modpow(int n, int k, int MOD) {
	int ans = 1; n %= MOD;
	while (k > 0) {
	  if (k & 1) ans = (ans*n) % MOD;
	  k >>= 1; n = (n*n) % MOD;
	}
	return ans;
}

Compiler output:
a.cc: In function 'void poppingfever()':
a.cc:51:12: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   51 | signed main() {
      |            ^~
a.cc:51:12: note: remove parentheses to default-initialize a variable
   51 | signed main() {
      |            ^~
      |            --
a.cc:51:12: note: or replace parentheses with braces to value-initialize a variable
a.cc:51:15: error: a function-definition is not allowed here before '{' token
   51 | signed main() {
      |               ^
a.cc:65:35: error: a function-definition is not allowed here before '{' token
   65 | int modpow(int n, int k, int MOD) {
      |                                   ^
a.cc:72:2: error: expected '}' at end of input
   72 | }
      |  ^
a.cc:36:21: note: to match this '{'
   36 | void poppingfever() {
      |                     ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

const int N = 100010;

struct lhy{
	int x, y, next;
}edge[N << 1];

int n, ans, son[N], f[N];

inline void add(int x, int y)
{
	edge[++tot].x = x; edge[tot].y = y; edge[tot].next = son[x]; son[x] = tot;
}
void dfs(int x, int fa)
{
	for(int i = son[x]; i; i = edge[i].next)
	{
		int y = edge[i].y;
		if(y == fa)continue;
		dfs(y, x);
		if(f[y] == 0)f[x] += 1;
		else f[x] += f[y];
	}
}

int main()
{
	scanf("%d", &n);
	for(int i = 1; i < n; i++)
	{
		int x, y;
		scanf("%d%d", &x, &y);
		x++, y++;
		add(x, y), add(y, x);
	}
	dfs(1, 0);
	printf("%d\n", f[1]);
}

Compiler output:
a.cc: In function 'void add(int, int)':
a.cc:15:16: error: 'tot' was not declared in this scope
   15 |         edge[++tot].x = x; edge[tot].y = y; edge[tot].next = son[x]; son[x] = tot;
      |                ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int boss=1e5;
int n,m,vis[boss+10];
vector<int> lj[boss+10];
int dfs(int u,int fa) {
	if (lj[u].size()>2) return u;
	for (int i:lj[u]) if (i!=fa) return dfs(i,u);
	return u;
}
int main() {
	int i,u,v;
	scanf("%d",&n);
	for (i=1; i<n; i++) {
		scanf("%d%d",&u,&v)
		u++;
		v++;
		lj[u].push_back(v);
		lj[v].push_back(u);
	}
	for (i=1; i<=n; i++) if (lj[i].size()==1) vis[dfs(i,0)]=1,m++;
	for (i=1; i<=n; i++) if (vis[i]) m--;

	printf("%d",max(m,1));
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:36: error: expected ';' before 'u'
   15 |                 scanf("%d%d",&u,&v)
      |                                    ^
      |                                    ;
   16 |                 u++;
      |                 ~
Language: C++

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

const int maxn = 1e5+5;
int cas=1;
int fa[maxn];
int Find(int x) {
    return fa[x] == x ? x : fa[x] = Find(fa[x]);
}
priority_queue<int,vector<int>,greater<int> >q[maxn], pp;
int a[maxn];
int vis[maxn];
void solve()
{
    int n, m;
    scanf("%d%d", &n, &m);
    for (int i = 0 ; i < n ; i ++) fa[i] = i;
    for (int i = 0 ; i < n ; i ++) scanf("%d", a+i);
    for (int i = 1 ; i <= m ; i ++) {
        int u, v;
        scanf("%d%d", &u, &v);
        u = Find(u);
        v = Find(v);
        fa[u] = v;
    }
    int k = 0;
    for (int i = 0 ; i < n ; i ++) {
        int tmp = Find(i);
        if (!vis[tmp]) {
            vis[tmp] = ++k;
            q[k].push(a[i]);
        }
        else q[vis[tmp]].push(a[i]);
    }
    if (k == 1) {
        printf("0\n");
        return ;
    }
    ll ans = 0;
    for (int i = 1 ; i <= k ; i ++) {
        if (q[i].empty()) continue;
        ans += q[i].top();
        q[i].pop();
        while(!q[i].empty()) {
            pp.push(q[i].top());
            q[i].pop();
        }
    }
    int sum = k - 2;
    int flag = 1;
    while(sum--) {
        if (pp.empty()) {
            flag = 0;
            break;
        }
        ans += pp.top();
        pp.pop();
    }
    if (!flag) printf("Impossible\n");
    else printf("%lld\n", ans);
}

//#if def a = TreeNode(Exp a) then Preaise;

Compiler output:
a.cc: In function 'void solve()':
a.cc:39:5: error: 'll' was not declared in this scope
   39 |     ll ans = 0;
      |     ^~
a.cc:42:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   42 |         ans += q[i].top();
      |         ^~~
      |         abs
a.cc:56:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   56 |         ans += pp.top();
      |         ^~~
      |         abs
a.cc:60:27: error: 'ans' was not declared in this scope; did you mean 'abs'?
   60 |     else printf("%lld\n", ans);
      |                           ^~~
      |                           abs
Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <vector>
#include <algorithm>
#include <cmath>

using namespace std;

#define mp make_pair
#define pb push_back
#define ll long long

#define maxN 100011

int n, i, x, y;
vector<int> list[maxN];
int gr[maxN];

int dp[maxN], up[maxN];

void dfs(int node, int root) {
    int i;

    for (i = 0; i < list[node].size(); i++) {
        int to = list[node][i];

        if (to == root) {
            list[node][i] = list[node].back();
            list[node].pop_back();
            i--;
            continue;
        }

        dfs(to, node);
    }

    if (list[node].empty()) {
        dp[node] = 1;
        up[node] = 0;
        return;
    }

    if (list[node].size() == 1) {
        int to = list[node][0];
        up[node] = up[to];
        dp[node] = dp[to];
        return;
    }

    up[node] = n + 1;
    for (auto to : list[node])
        dp[node] += dp[to];

    int base = dp[node];

    for (auto to : list[node])
        dp[node] = min(dp[node], base - dp[to] + up[to]);
}

int main()
{
/    freopen("test.in","r",stdin);

    cin >> n;
    for (i = 1; i < n; i++) {
        cin >> x >> y;
        x++; y++;

        list[x].pb(y);
        list[y].pb(x);
        gr[x]++; gr[y]++;
    }

    for (i = 1; i <= n && gr[i] <= 2; i++);
    if (i == n) {
        cout << 1;
        return 0;
    }

    dfs(i, 0);
    cout << dp[i];


    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:63:1: error: expected primary-expression before '/' token
   63 | /    freopen("test.in","r",stdin);
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
const int maxn=2e5+5;
int n;

vector<vector<int> >v;
vector<int >deg;

int dp[maxn];
int ans;

void dfs(int x,int prev)
{
	for(int i=0;i<v[x].size();i++)
	{
		int son=v[x][i];
		if(son!=prev)
		{
			dfs(son,x);
		}
	}
	int sum=0;
	for(int i=0;i<v[x].size();i++)
	{
		int son=v[x][i];
		if(son!=prev)
		{
			sum+=dp[son];
		}
	}
	//dp[x]有可能为0 
	int add=0;
	for(int i=0;i<tmp.size();i++)
	{
		if(!tmp[i])add++; 
	}
	dp[x]=sum+max(add-1,0);//add-1可能<0 
}

int main()
{
	ios::sync_with_stdio(0);
	
	cin>>n;v.resize(n+1);deg.resize(n+1);
	for(int i=1;i<n;i++)
	{
		int a,b;cin>>a>>b;
		v[a].push_back(b);v[b].push_back(a);
		deg[a]++;deg[b]++;
	}
	
	int ma=0,root=-1;
	for(int i=0;i<n;i++)
	{
		if(deg[i]>ma)
		{
			ma=deg[i];
			root=i;
		}
	}
	if(ma<=2)
	{
		cout<<"1\n";return 0;
	}
	
	dfs(root,-1);
	cout<<dp[root];
	return 0;
}

Compiler output:
a.cc: In function 'void dfs(int, int)':
a.cc:33:23: error: 'tmp' was not declared in this scope; did you mean 'tm'?
   33 |         for(int i=0;i<tmp.size();i++)
      |                       ^~~
      |                       tm
Language: C++

#include <bits/stdc++.h>
using namespace std;
int n,maxx;
vector <int> v[100005]; 
int dp[100005];
void dfs1(int pos,int fa){
	for (int i=0;i<v[pos].size();++i){
		if (v[pos][i]==fa)continue;
		dfs1(v[pos][i],pos);
		dp[pos]+=dp[v[pos][i]];
	}
	dp[pos]+=max(0,v[pos].size()-1-dp[pos]);
}
int main(){
	scanf("%d",&n);
	for (int i=1;i<n;++i){
		int a,b;
		scanf("%d%d",&a,&b);
		v[a].push_back(b);
		v[b].push_back(a);
	}
	for (int i=1;i<n;++i){
		if (v[i].size()>v[maxx].size())maxx=i;
	}
	dfs1(maxx,-1);
	cout<<max(1,dp[maxx]);
}

Compiler output:
a.cc: In function 'void dfs1(int, int)':
a.cc:12:21: error: no matching function for call to 'max(int, std::vector<int>::size_type)'
   12 |         dp[pos]+=max(0,v[pos].size()-1-dp[pos]);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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:12:21: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::vector<int>::size_type' {aka 'long unsigned int'})
   12 |         dp[pos]+=max(0,v[pos].size()-1-dp[pos]);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:12:21: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   12 |         dp[pos]+=max(0,v[pos].size()-1-dp[pos]);
      |                  ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

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

#define f first
#define s second
#define pb push_back
#define all(c) c.begin(),c.end()

#define gi(x) scanf("%d", &x)
#define pi(x) printf("%d", x)
#define gl(x) scanf("%lld", &x)
#define pl(x) printf("%lld", x)
#define sp printf(" ")
#define nl printf("\n")

typedef long long int lld;
typedef long double ldb;

#define TRACE
#ifdef TRACE
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
	template <typename Arg1>
	void __f(const char* name, Arg1&& arg1){
		cerr << name << " : " << arg1 << std::endl;
	}
	template <typename Arg1, typename... Args>
	void __f(const char* names, Arg1&& arg1, Args&&... args){
		const char* comma = strchr(names + 1, ','); cerr.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
	}
#else
#define trace(...)
#endif

vector <int> adj[100010];

int dp[100010][2];

void dfs(int i, int par){
    bool mk = false;
    for(auto j: adj[i]){
        if(j == par) continue;
        mk = true;
        dfs(j, i);
    }
    if(mk == 0){
        dp[i][0] = dp[i][1] = 1;
    }
    else{
        int sm = 0, co = 0;
        for(auto j: adj[i]){
            if(j == par) continue;
            sm += dp[j][1];
            co++;
        }
        dp[i][0] = sm + 1;
        for(auto j: adj[i]){
            if(j == par) continue;
            dp[i][0] = min(dp[i][0], sm - dp[j][1] + dp[j][0]);
        }
        int mn1 = 1e7, mn2 = 1e7;
        for(auto j: adj[i]){
            if(j == par) continue;
            if(dp[j][0] - dp[j][1] <= mn1){
                mn2 = mn1;
                mn1 = dp[j][0] - dp[j][1];
            }
            else if(dp[j][0] - dp[j][1] < mn2){
                mn2 = dp[j][0] - dp[j][1];
            }
        }
        if(mn1 == 1e7 or mn2 == 1e7) dp[i][1] = dp[i][0];
        else dp[i][1] = sm + mn1 + mn2 - 1;
        dp[i][1] = min(dp[i][0], dp[i][1]);
    }
}

main(){
    int n;
    cin >> n;
    for(int x, y, i = 1; i < n; ++i){
        cin >> x >> y;
        adj[x].pb(y);
        adj[y].pb(x);
    }
    dfs(0, -1);
    ans = min(dp[0][0], dp[0][1]);
    cout << (ans>2?ans-1:ans) << endl;
}


Compiler output:
a.cc:77:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   77 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:86:5: error: 'ans' was not declared in this scope; did you mean 'abs'?
   86 |     ans = min(dp[0][0], dp[0][1]);
      |     ^~~
      |     abs
Language: C++

#include <cstdio>
#include <vector>
using namespace std;

vector<int> g[100001];
int dp[100001][2];
int p[100001];

void dfs(int me){
    int ccnt = 0;
    for(auto &nxt: g[me]){
        if(nxt == p[me]) continue;
        p[nxt] = me;
        ccnt++;
        dfs(nxt);
    }
    if(ccnt >= 2){
        int one = 1;
        for(auto &nxt: g[me]){
            if(nxt == p[me]) continue;
            dp[me][0] += max(1, dp[nxt][1]);
            dp[me][1] += max(1 - one, dp[nxt][1]);
            if(dp[nxt][1] == 0){
                one = 0;
            }
        }
    /*
    }
    else if(ccnt == 2){
        int w[2] = {0};
        for(auto &nxt: g[me]){
            if(nxt == p[me]) continue;
            if(w[0] == 0) w[0] = nxt;
            else w[1] = nxt;
        }
        int candi1 = max(1, dp[w[0]][0]) + dp[w[1]][1];
        int candi2 = max(1, dp[w[1]][0]) + dp[w[0]][1];
        dp[me][1] = 
        dp[me][0] = max(1, dp[w[0]][0]) + max(1, dp[w[1]][0]);
        */
    }else{
        for(auto &nxt: g[me]){
            if(nxt == p[me]) continue;
            dp[me][0] += max(1, dp[nxt][1]);
            dp[me][1] += max(1 - one, dp[nxt][1]);
            if(me == 0) dp[me][1]++;
        }
    }
    dp[me][1] = min(dp[me][0], dp[me][1]);
    //printf("%d %d %d\n",me,dp[me][0],dp[me][1]);
}

int main(){
    int n;
    scanf("%d",&n);
    for(int i=1;i<n;i++){
        int aa, bb;
        scanf("%d%d",&aa,&bb);
        g[aa].push_back(bb);
        g[bb].push_back(aa);
    }
    p[0] = 0;
    dfs(0);
    printf("%d\n", dp[0][1]);
}


Compiler output:
a.cc: In function 'void dfs(int)':
a.cc:45:34: error: 'one' was not declared in this scope
   45 |             dp[me][1] += max(1 - one, dp[nxt][1]);
      |                                  ^~~
Language: C++

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

const int N = 1e5 + 5;
const int INF = 1e9 + 5;
vector<int> adj[N];
long long dp[N][2];
int n;



void dfs(int u, int par) {
	int mx = 0 , sz = 0;
	for (int nxt : adj[u]) {
		if (nxt == par)
			continue;
		sz++;
		dfs(nxt , u);
		dp[u][1] += dp[nxt][1];
		mx = max(mx , dp[nxt][1] - dp[nxt][0]);
	}

	dp[u][0] = dp[u][1] - mx;
	if(sz == 0){
		dp[u][1] = 1;
	}else if(sz >= 2){
		dp[u][1] -= mx;
	}
}

int main() {

	int a, b;
	scanf("%d", &n);
	for (int i = 1; i < n; i++) {
		scanf("%d%d", &a, &b);
		adj[a].push_back(b);
		adj[b].push_back(a);
	}

	for (int i = 0; i < n; i++) {
		if (adj[i].size() > 1) {
			dfs(i,-1);
			printf("%lld\n",max(dp[i][0],1LL));
			return 0;
		}
	}

	puts("1");

	return 0;
}


Compiler output:
a.cc: In function 'void dfs(int, int)':
a.cc:20:25: error: no matching function for call to 'max(int&, long long int)'
   20 |                 mx = max(mx , dp[nxt][1] - dp[nxt][0]);
      |                      ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:20:25: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   20 |                 mx = max(mx , dp[nxt][1] - dp[nxt][0]);
      |                      ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:20:25: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   20 |                 mx = max(mx , dp[nxt][1] - dp[nxt][0]);
      |                      ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include <iostream>
#include <vector>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <map>
#include <algorithm>
#include <math.h>
#include <iostream>     // std::cout, std::fixed
#include <iomanip>
#include<queue>
#include <cmath>
#include <stack>
#include <queue>
#include <set>
#include <iostream>
#include <sstream>
#include <time.h>
using namespace std;
typedef long long ll;
vector<vector<int>> g;
vector<int> got;
ll ans;
void dfs(int cur,int f)
{
    int count=0;
    for(auto sons: g[cur])
    {
        if(sons!=f)
        {
            dfs(sons,cur);
            if(got[sons]==0)
                count+=1;
            got[cur]=max(got[cur],got[sons]);
            
        }
    }
    if(cur==0)
    {
        if(count<=1)
            ans++;
    }
    if(count>=2)
    {
        ans+=(count-1);
        got[cur]=1;
       
    }
    
    
    
    
}
int main () {
    ios_base::sync_with_stdio(false);
    ans=0;
    plus1=0;
    int n;
    cin>>n;
    g=vector<vector<int>>(n);
    got=vector<int>(n,0);
    for(int i=0;i<n-1;i++)
    {
        int x,y;
        cin>>x>>y;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    dfs(0,-1);
    

    cout<<ans;
    
    
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:57:5: error: 'plus1' was not declared in this scope
   57 |     plus1=0;
      |     ^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define R cin>>
#define Z class
#define ll long long
#define ln cout<<'\n'
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
template<Z A>void pr(A a){cout<<a;ln;}
template<Z A,Z B>void pr(A a,B b){cout<<a<<' ';pr(b);}
template<Z A,Z B,Z C>void pr(A a,B b,C c){cout<<a<<' ';pr(b,c);}
template<Z A,Z B,Z C,Z D>void pr(A a,B b,C c,D d){cout<<a<<' ';pr(b,c,d);}
template<Z A>void PR(A a,ll n){rep(i,n){if(i)cout<<' ';cout<<a[i];}ln;}
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}
const ll MAX=1e9+7,MAXL=1LL<<61,dx[4]={-1,0,1,0},dy[4]={0,1,0,-1};
typedef pair<int,int> P;

vector<int> v[111111];

ll dfs(ll x,ll p) {
  ll sum=0,M=MAX;
  rep(i,v[x].size()) {
    ll y=v[x][i];
    if(y==p) continue;
    ll d=dfs(y,x);
    sum+=d;
    M=min(M,d);
  }
  if(sum==M||M==MAX) M=0;
  if(!sum) sum++;
  return sum-M;
}

void Main() {
  int n;
  R n;
  rep(i,n-1) {
    int x,y;
    cin >> x >> y;
    v[x].pb(y);
    v[y].pb(x);
  }
  ll M=0,x=0;
  vector<ll> g;
  rep(i,n) {
    if(v[i].size()>1) g.pb(i);
  }
  M=MAX;
  rep(i,min((int)g[i].size(),50)) M=min(M,dfs(g[i],-1));
  pr(M);
}

int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}


Compiler output:
a.cc: In function 'void Main()':
a.cc:59:23: error: request for member 'size' in 'g.std::vector<long long int>::operator[](((std::vector<long long int>::size_type)i))', which is of non-class type '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'}
   59 |   rep(i,min((int)g[i].size(),50)) M=min(M,dfs(g[i],-1));
      |                       ^~~~
a.cc:16:44: note: in definition of macro 'REP'
   16 | #define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
      |                                            ^
a.cc:59:3: note: in expansion of macro 'rep'
   59 |   rep(i,min((int)g[i].size(),50)) M=min(M,dfs(g[i],-1));
      |   ^~~
Language: C++

#include<iostream>
#include<cstdio>
#include<vector>
#include<string>
#include<cstring>
#include<functional>
#include<stack>
#include<queue>
#include<iomanip>
#include<map>
#include<limits>
#include<cmath>
#include<algorithm>
#include<bitset>
#include<deque>
#include<utility>
#include<complex>
#include<cstdlib>
#include<set>
#include<cctype>

using namespace std;

#define DBG cerr << '!' << endl;
#define REP(i,n) for(ll (i) = (0);(i) < (n);++i)
#define rep(i,s,g) for(ll (i) = (s);(i) < (g);++i)
#define rrep(i,s,g) for(ll (i) = (s);i >= (g);--(i))
#define PB push_back
#define MP make_pair
#define FI first
#define SE second
#define SHOW1d(v,n) {for(int W = 0;W < (n);W++)cerr << v[W] << ' ';cerr << endl << endl;}
#define SHOW2d(v,i,j) {for(int aaa = 0;aaa < i;aaa++){for(int bbb = 0;bbb < j;bbb++)cerr << v[aaa][bbb] << ' ';cerr << endl;}cerr << endl;}
#define ALL(v) v.begin(),v.end()
#define Decimal fixed<<setprecision(10)

typedef long long ll;
typedef vector<int> iv;
typedef vector<iv> iiv;
typedef vector<string> sv;

vector<vector<int> > v(111111);
ll ans,n;
ll ret = 1000000;

bool dfs(int now,int prev)
{
	if(v[now].size() == 1 && prev != -1)
	{
		return false;
	}
	
	int tmp = 0;
	REP(i,v[now].size())
	{
		if(v[now][i] == prev)continue;
		
		if(dfs(v[now][i],now))
		{
			tmp++;
		}
	}
	
	//cout << now << ' ' << v[now].size() - 1 << ' ' << tmp << endl;
	if((int)v[now].size() - 2 > tmp)
	{
		//cout << ' ' << v[now].size()-2-tmp << endl;;
		ans+=v[now].size()-2-tmp;
		tmp++;
	}
	
	if(tmp)	return true;
	else return false;
}

int main()
{
	cin >> n;
	
	REP(i,n-1)
	{
		int a,b;cin >> a >> b;
		v[a].PB(b);
		v[b].PB(a);
	}
	
//	cout << i << endl;
	ans = 0;
	dfs(i,-1);
	ret = min(ret,ans);
//	cout << ret << endl;
	
	
	cout << ret+1 << endl;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:89:13: error: 'i' was not declared in this scope
   89 |         dfs(i,-1);
      |             ^
Language: C++

#include<cstdio>
#include<cstring>
using namespace std;
const int maxn=1000000;
int n,d[maxn+4]={0},v[25]={0},f[(1<<16)+4];
int main()
{
	int x,y,z;
	scanf("%d",&n);
	for(int i=1;i<n;i++){
		scanf("%d%d%d",&x,&y,&z);
		d[x]^=z,d[y]^=z;
	} 
	int all=15,s=0,res=0;
	for(int i=0;i<n;i++)v[d[i]]++;
	for(int i=0;i<=all;i++)res+=v[i]/2,v[i]%=2,s|=(1<<v[i]);
	memset(f,0x3f,sizeof(f));
	f[0]=0;
	for(int i=0;i<=(1<<all);i++)
		for(int u=0;u<=15;u++){
			if(i&(1<<u))
			for(int v=0;v<=15;v++){
				if(i&(1<<v)){
					int w=u^v;
					if(i&(1<<w))f[i]=min(f[i],f[i-(1<<w)-(1<<u)-(1<<v)]+2);
					else f[i]=min(f[i],f[i-(1<<u)-(1<<v)+(1<<w)]+1);
				}
			}
		}
	printf("%d",f[s]+res);
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:58: error: 'min' was not declared in this scope; did you mean 'main'?
   25 |                                         if(i&(1<<w))f[i]=min(f[i],f[i-(1<<w)-(1<<u)-(1<<v)]+2);
      |                                                          ^~~
      |                                                          main
a.cc:26:51: error: 'min' was not declared in this scope; did you mean 'main'?
   26 |                                         else f[i]=min(f[i],f[i-(1<<u)-(1<<v)+(1<<w)]+1);
      |                                                   ^~~
      |                                                   main
Language: C++

/*
ID: Barry Wang
LANG: C++11
TASK: 
*/
#include <bits/stdc++.h>
using namespace std;
/*---define tricks---*/
#define ALL(v) v.begin(),v.end()
#define UN(v) sort(ALL(v)),v.erase(unique(ALL(v)),v.end())
#define FILL(x,y) memset(x,y,sizeof(x))
#define EACH(v,it) for(__typeof(v.begin()) it=v.begin();it!=v.end();it++)
#define FIO ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define revsort(b,e) sort(b,e),reverse(b,e)
#define X first
#define Y second
#define Chtolly return 0
/*---define types---*/
typedef long long ll;
typedef list<int> li;
typedef queue<int> qi;
typedef deque<int> dqi;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef pair<ll,ll> pll;
typedef pair<ll,int> pli;
typedef unsigned int uint;
/*---define variables---*/
const int inf=(1<<29);
int n;
int x[100005],y[100005],v[100005];
int val[100005];
int cnt[100005];
ll ans;
uint st;
bool zero[1<<16];
ll dp[1<<16];
/*---define function---*/

/*---main code---*/
int main(){
	cin>>n;
	for(int i=1;i<n;++i){
		cin>>x[i]>>y[i]>>v[i];
		val[x[i]]^=v[i];val[y[i]]^=v[i];
	}
	for(int i=1;i<=n;++i){
		cnt[val[i]]++;
	}
	for(int i=1;i<=15;++i){
		ans+=cnt[i]/2;
		if(cnt[i]%2){
			st|=(1<<i);
		}
	}
	for(int mask=0;mask<(1<<16);++mask){
		int V=0;
		for(int i=0;i<16;++i){
			if(mask&(1<<i)){
				x^=i;
			}
		}
		if(x==0){
			zero[mask]=1;
		}
	}
	for(int mask=0;mask<(1<<16);++mask){
		if(mask&1){
			continue;
		}
		int M=mask;
		while(M>0){
			if(zero[M]){
				dp[mask]=max(dp[mask],dp[mask^M]+1);
			}
			M=(M-1)&mask;
		}
	}
	cout<<ans+__builtin_popcount(st)-dp[st]<<'\n';
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:61:34: error: invalid operands of types 'int [100005]' and 'int' to binary 'operator^'
   61 |                                 x^=i;
      |                                 ~^~~
a.cc:61:34: note:   in evaluation of 'operator^=(int [100005], int)'
Language: C++

#include <iostream> 
#include <cstdio> 
#include <cstring> 
#include <algorithm> 
#include <cmath> 

using namespace std; 

#define N 100010
#define M 65540

int n, s[N], x, ans, u, v, w; 
int f[M], inf, sum[20]; 

int dfs(int S) {
    if(!S)return 0; 
    if(f[S] < inf) return f[S]; 
    for(int i = 0; i < 16; i++) {
        if ((S >> i) & 1) {
            for(int j = 0; j < 16; j++) {
                if (i != j && (S >> j) & 1) {
                    int p = i^j, x = S^(1 << i)^(1 << j)^(1 << p); 
                    if (S >> p & 1)f[S] = min(f[S], dfs(x) + 2); 
                    else f[S] = min(f[S], dfs(x) + 1); 
                }
            }
        }
    }   
    return f[S]; 
}

int main() {
    scanf("%d",&n); 
    for(int i = 1 ; i < n ; i++) {
        scanf("%d%d%d",  & u,  & v,  & w); 
        s[u] ^= w, s[v] ^= w; 
    }
    for(int i = 0 ; i < n ; i++) sum[s[i]]++; 
    for(int i = 1 ; i < 16 ; i++) {
        ans + = (sum[i] >> 1); 
        x + = (1 << i) * (sum[i] & 1); 
    }
    memset(f, 127, sizeof(f)); 
    inf = f[0]; 
    printf("%d\n", ans + dfs(x)); 
    //system("pause");
    return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:15: error: expected primary-expression before '=' token
   40 |         ans + = (sum[i] >> 1);
      |               ^
a.cc:41:13: error: expected primary-expression before '=' token
   41 |         x + = (1 << i) * (sum[i] & 1);
      |             ^
Language: C++

#include<Bits/stdc++.h>
using namespace std;
const int N=1e5+100;
int cnt[N],v[N],dp[N];
int dfs(int s)
{
	if(s==0) return 0;
	if(dp[s]!=-1) return dp[s];
	dp[s]=0x3f3f3f3f;
	for(int i=0;i<16;i++)
	{
		if(s>>i&1)
		{
			for(int j=0;j<16;j++)
			{
				if(s>>j&1)
				{
					int x=i^j;int ns=s^(1<<i)^(1<<j)^(1<<x);
					if(__builtin_popcount(ns)<__builtin_popcount(s))
					 dp[s]=min(dp[s],dfs(ns)+1+((s&(1<<x))==(1<<x)));
				}
			} 
	    }
	}
	return dp[s];
}
int main()
{
	int n;
	cin>>n;
	for(int i=1,x,y,z;i<n;i++)
	{
		cin>>x>>y>>z;
		v[x]^=z;
		v[y]^=z;
	}
	memset(dp,-1,sizeof dp);
	for(int i=0;i<n;i++)
	 if(v[i]) cnt[v[i]]++;
	int st=0,ans=0;
	for(int i=1;i<16;i++)
	{
		ans+=cnt[i]/2;
		st|=(cnt[i]&1)*(1<<i);
	} 
	ans+=dfs(st);
	cout<<ans<<endl;
	return 0;
}

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

#include<bits/stdc++.h>
using namespace std;
int N=2*1e5+10;
int w[N],d[N],cnt[20],res,n,st,sxr[N];
bool book[N];
int main()
{
    scanf("%d",&n);
    for(int i=1,u,v,va;i<n;i++)
    {
        scanf("%d%d%d",&u,&v,&va);
        w[u]^=va;
        w[v]^=va;
    }
    for(int i=0;i<n;i++)
        cnt[w[i]]++; 
    for(int i=1;i<=15;i++)
    {
        res+=cnt[i]/2;
        st|=(cnt[i]&1)<<(i-1); 
    }
    for(int i=1;i<(1<<15);i++)
        d[i]=d[i>>1]+(i&1);
    for(int i=1;i<(1<<15);i++)
        d[i]-=1;
    for(int i=1;i<(1<<15);i++)
        for(int j=0;j<15;j++)
            if((i>>j)&1)
                sxr[i]^=(j+1);
    for(int i=1;i<(1<<15);i++)
    {
        if(sxr[i]!=0)
            continue;
        for(int k=(i-1)&i;k;k=(k-1)&i)
            if(sxr[k]==0)
                d[i]=min(d[i],d[k]+d[i^k]);
    }
        printf("%d",res+d[st]);
    return 0;
}

Compiler output:
a.cc:4:7: error: size of array 'w' is not an integral constant-expression
    4 | int w[N],d[N],cnt[20],res,n,st,sxr[N];
      |       ^
a.cc:4:12: error: size of array 'd' is not an integral constant-expression
    4 | int w[N],d[N],cnt[20],res,n,st,sxr[N];
      |            ^
a.cc:4:36: error: size of array 'sxr' is not an integral constant-expression
    4 | int w[N],d[N],cnt[20],res,n,st,sxr[N];
      |                                    ^
a.cc:5:11: error: size of array 'book' is not an integral constant-expression
    5 | bool book[N];
      |           ^
Language: C++

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cstring>

const int maxn = 1e5 + 20;
const int maxs = (1 << 16) + 7;

int n;
int val[maxn], cnt[16], ans;
int dp[maxs];

template<class TAT>void checkmin(TAT &x,const TAT &y)
{
	if(y < x) x = y;
}
int dfs(int x)
{
	if(dp[x] != -1) return dp[x];
	
	dp[x] = maxs;
	
	for(int i = 0; i < 16; i++)
		for(int j = 0; j < 16; j++)
			if(x != y && ((x >> i) & 1) && ((x >> j) & 1))
			{
				int tmp = x ^ (1 << i) ^ (1 << j);
				int modify = i ^ j;
				
				checkmin(dp[x], tmp ^ (1 << modify) + 1 + ((tmp >> modify) & 1));
			}
	
	return dp[x];
}
int main()
{
	scanf("%d", &n);
	for(int i = 1, x, y, a; i < n; i++)
	{
		scanf("%d%d%d", &x, &y, &a);
		++x, ++y;
		val[x] ^= a, val[y] ^= a;
	}
	
	for(int i = 1; i <= n; i++)
	{
		if(val[i])
		{
			ans += cnt[val[i]];
			cnt[val[i]] ^= 1;
		}
	}
	
	int now = 0;
	
	for(int i = 0; i < 16; i++) now |= (1 << i) * cnt[i];
	
	memset(dp, -1, sizeof(dp));
	dp[0] = 0;
	ans += dfs(now);
	
	printf("%d\n", ans);
	return 0;
}

Compiler output:
a.cc: In function 'int dfs(int)':
a.cc:25:33: error: 'y' was not declared in this scope
   25 |                         if(x != y && ((x >> i) & 1) && ((x >> j) & 1))
      |                                 ^
Language: C++

#include <cstdio>
#include <algorithm>
#include <cstring>
#include <vector>
#include <iostream>
using namespace std;
#define lson l,(l+r)/2,rt<<1
#define rson (l+r)/2+1,r,rt<<1|1
#define dbg(x) cout<<#x<<" = "<< (x)<< endl
#define pb push_back
#define fi first
#define se second
#define ll long long
#define sz(x) (int)(x).size()
const int mxn=1e5+10;
int b[mxn];
int cnt[16];
int a[20];
int sz=0;
int dp[mxn];
bool flag[mxn];
inline void check(int mask){
	int x=0;
	for(int i=0;i<sz;i++){
		if(mask &(1<<i))x^=a[i];
	}
	flag[i]= (x==0);
}
int main(){
	int n;
	scanf("%d",&n);
	for(int i=1;i<n;i++){
		int u,v,w;
		scanf("%d %d %d",&u,&v,&w);
		b[u]^=w;
		b[v]^=w;
	}
	for(int i=0;i<n;i++){
		cnt[b[i]]++;
	}
	int component=cnt[0];
	for(int i=1;i<16;i++){
		component+=cnt[i]/2;
		if(cnt[i]%2)a[sz++]=i;
	}
	int up=(1<<sz)-1;
	for(int i=1;i<=up;i++){
		check(i);
		for(int x=i;x;x=((x-1)&i)){
			if(flag[i])dp[i]=max(dp[i],1+dp[x^i]);
		}
	}
	cout<<n-component-dp[up];
	return 0;
}

Compiler output:
a.cc: In function 'void check(int)':
a.cc:27:14: error: 'i' was not declared in this scope
   27 |         flag[i]= (x==0);
      |              ^
Language: C++

import java.util.Scanner;

class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int N = scan.nextInt();
        int bit[] = new int[N];
        for(int i=0;i<N-1;++i){
            int x = scan.nextInt();
            int y = scan.nextInt();
            int a = scan.nextInt();
            bit[x]^=a;
            bit[y]^=a;
        }
        int count[] = new int[1<<4];
        for(int i=0;i<N;++i)count[bit[i]]++;
        int ans =0;
        for(int i=1;i<(1<<4);++i){
            ans+=count[i]/2;
            count[i]%=2;
        }
        int num=0;
        for(int i=1;i<(1<<4);++i){
            if(count[i]>0){
                num^=i;
                count[i]--;
                if(num==i)continue;
                ++ans;
                if(count[num]>0){
                    ++ans;
                    num=0;
                    count[num]--;
                }
            }
        }
        System.out.println(ans);
    }
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:11: error: expected ':' before 'static'
    4 |     public static void main(String[] args){
      |           ^~~~~~~
      |           :
a.cc:4:29: error: 'String' has not been declared
    4 |     public static void main(String[] args){
      |                             ^~~~~~
a.cc:4:38: error: expected ',' or '...' before 'args'
    4 |     public static void main(String[] args){
      |                                      ^~~~
a.cc:38:2: error: expected ';' after class definition
   38 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:5:9: error: 'Scanner' was not declared in this scope
    5 |         Scanner scan = new Scanner(System.in);
      |         ^~~~~~~
a.cc:6:17: error: 'scan' was not declared in this scope
    6 |         int N = scan.nextInt();
      |                 ^~~~
a.cc:7:21: error: initializer fails to determine size of 'bit'
    7 |         int bit[] = new int[N];
      |                     ^~~~~~~~~~
a.cc:7:21: error: array must be initialized with a brace-enclosed initializer
a.cc:15:23: error: initializer fails to determine size of 'count'
   15 |         int count[] = new int[1<<4];
      |                       ^~~~~~~~~~~~~
a.cc:15:23: error: array must be initialized with a brace-enclosed initializer
a.cc:36:9: error: 'System' was not declared in this scope
   36 |         System.out.println(ans);
      |         ^~~~~~
Language: Java

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

public class F {

	class Edge {
		int from, to, mark;

		public Edge(int from, int to, int mark) {
			super();
			this.from = from;
			this.to = to;
			this.mark = mark;
		}

		@Override
		public String toString() {
			return "Edge [from=" + from + ", to=" + to + ", mark=" + mark + "]";
		}
		
	}
	
	List<Edge>[] graph;
	
	int dfs(int u, int p) {
		int xor = 0;
		for (int t = 0; t < graph[u].size(); t++) {
			Edge e = graph[u].get(t);
			int to = u ^ e.from ^ e.to;
			if (to == p) {
				continue;
			}
			e.mark ^= dfs(to, u);
			xor ^= e.mark;
		}
		return xor;
	}
	
	void solve() {
		int n = in.nextInt();
		graph = new List[n];
		for (int i = 0; i < n; i++) {
			graph[i] = new ArrayList<>();
		}
		
		Edge[] e = new Edge[n - 1];
		for (int i = 0; i < n - 1; i++) {
			e[i] = new Edge(in.nextInt(), in.nextInt(), in.nextInt());
			graph[e[i].from].add(e[i]);
			graph[e[i].to].add(e[i]);
		}
		dfs(0, -1);
		int allMask = 0;
		int result = 0;
		for (int i = 0; i < n - 1; i++) {
			int bit = e[i].mark;
			if (bit == 0) {
				result++;
				continue;
			}
			if ((allMask & (1 << bit)) != 0) {
				result++;
			}
			allMask ^= 1 << bit;
		}
		int[] xor = new int[1 << 16];
		for (int i =0 ; i < 1 << 16; i++) {
			for (int j = 0; j < 16; j++ ) {
				if ((i & (1 << j)) != 0) {
					xor[i] ^= j;
				}
			}
		}
		int[] dp = new int[1 << 16];
		for (int mask = 1; mask < 1 << 16; mask++) {
			for (int submask = mask; submask > 0; submask = (submask - 1) & mask) {
				if (xor[submask] == 0) {
					dp[mask] = Math.max(dp[mask], dp[mask ^ submask] + 1);
				}
			}
		}
		out.println((n - 1) - (dp[allMask] + result));
	}

	FastScanner in;
	PrintWriter out;

	void run() {
		in = new FastScanner();
		out = new PrintWriter(System.out);
		solve();
		out.close();
	}

	class FastScanner {
		BufferedReader br;
		StringTokenizer st;

		public FastScanner() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}

		public FastScanner(String s) {
			try {
				br = new BufferedReader(new FileReader(s));
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		public String nextToken() {
			while (st == null || !st.hasMoreTokens()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
				}
			}
			return st.nextToken();
		}

		public int nextInt() {
			return Integer.parseInt(nextToken());
		}

		public long nextLong() {
			return Long.parseLong(nextToken());
		}

		public double nextDouble() {
			return Double.parseDouble(nextToken());
		}
	}

	public static void main(String[] args) {
		new F().run();
	}
}


Compiler output:
Main.java:4: error: class F is public, should be declared in a file named F.java
public class F {
       ^
Note: Main.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
Language: C++

#include <bits/stdc++.h>
#define L long long

using namespace std;

L n,yang;
char str[200020];
L a[200020];
L ans[200020];

struct Point{
	L loc,det;
}p[200020];
L top;

void E(){
	puts("NO");
	exit(0);
}

int main()
{
	scanf("%lld %s",&n,str);
	L i;
	for(i=0;str[i];i++)
	{
		a[i+1]=str[i-1]-'0';
	}
	a[0]=a[2*n]=1;
	for(i=0;i<=2*n;i++)
	{
		if(a[i]&&a[i+1]) yang++; 
	}
	if(yang%2||(yang==2&&a[1]&&a[2*n-1])) while(1);
	else E();
	
	for(i=1;i<=2*n;i++)
	{
		if(a[i]&&a[i-1])
		{
			p[++top]=(S){i,2};
		}
		else if(a[i])
		{
			p[++top]=(S){i,1};
		}
		else if(a[i-1])
		{
			p[++top]=(S){i,3};
		}
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:41:35: error: 'S' was not declared in this scope
   41 |                         p[++top]=(S){i,2};
      |                                   ^
a.cc:45:35: error: 'S' was not declared in this scope
   45 |                         p[++top]=(S){i,1};
      |                                   ^
a.cc:49:35: error: 'S' was not declared in this scope
   49 |                         p[++top]=(S){i,3};
      |                                   ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define PB push_back
#define MP make_pair
#define SZ(v) ((int)(v).size())
#define FOR(i,a,b) for(int i=(a);i<(b);++i)  
#define REP(i,n) FOR(i,0,n)
#define FORE(i,a,b)for(int i=(a);i<=(b);++i)
#define REPE(i,n) FORE(i,0,n)
#define FORSZ(i,a,v) FOR(i,a,SZ(v))
#define REPSZ(i,v) REP(i,SZ(v))
typedef long long ll;
typedef unsigned long long ull;

ll gcd(ll a,ll b){
	return b==0?a:gcd(b,a%b);
}
const int MAXN=100000;
const int MAXS=2*MAXN-1;
int n;
char s[MAXS+3];
int ans[2*MAXN],nans;

void remove(vector<int> &lst,int val){
	int idx=0;
	while(idx<SZ(lst)&&lst[idx]!=val)++idx;
	assert(idx<SZ(lst));
	lst.erase(lst.begin()+idx);
}

vector<int> none,both,lft,rgt;

bool solve(){
	REP(i,2*n)ans[i]=-1;
	nans=0;
	none.clear(),both.clear();
	lft.clear(),rgt.clear();
	REP(i,2*n)
		if(s[i]=='0'&&s[i+1]=='0')none.PB(i);
		else if(s[i]=='0')rgt.PB(i);
		else if(s[i+1]=='0')lft.PB(i);
		else both.PB(i);
	if(SZ(lft)!=SZ(rgt)||SZ(none)%2!=0||
	SZ(both)%2!=0) return false;
	if(SZ(both)%4==2){
		int at=0;
		while(at<=2*n&&s[at]=='1')++at;
		if(at>2*n) return false;
		while(1){
			while(at+1<=2*n&&s[at+1]=='0')
				++at;
			if(at+1>2*n) return false;
			if(at+2<=2*n&&s[at+2]=='1')
				break;
			else at+=2;
		}
		int to=at+1;
		while(to<=2*n&&s[to]=='1')++to;
		if(to>2*n)return false;
		int idx=0;
		while(idx<SZ(both)&&at+1<=both[idx]
		&&both[idx]<=to-2)++idx;
		if(idx>=SZ(both)) return false;
		if(both[idx]<=at)
		while(idx+1<SZ(both)&&
		both[idx+1]+1<=at)++idx;
		int a=at,b=to-1,c=a+1,d=both[idx];
		ans[a]=ans[b]=++nans;
		ans[c]=ans[d]=++nans;
		remove(rgt,a);
		remove(lft,b);
		remove(both,c);
		remove(both,d);
	}
	REPSZ(i,lft){
		int a=lft[i],b=rgt[i];
		ans[a]=ans[b]=++nans;
	}
	for(int i=0;i<SZ(none);i+=2){
		int a=none[i],b=none[i+1];
		ans[a]=ans[b]=++nans;
	}
	for(int i=0;i<SZ(both);i+=4){
		int a=both[i],b=both[i+1];
		c=both[i+2],d=both[i+3];
		ans[a]=ans[c]=++nans;
		ans[b]=ans[d]=++nans;
	}
	return true;
}

void run(){
	scanf("%d %c",&n,s+1);
	s[0]='1';
	s[2*n]='1';
	s[2*n+1]='\0';
	if(!solve()){
		printf("No\n");
		return;
	}
	printf("Yes\n");
	REP(i,2*n){
		if(i!=0)
			printf(" ");
			printf("%d",ans[i]);
	}
	puts("");
}

char t[MAXS+3];
int sum[MAXN+1];
void testans(){
	FORE(i,1,n)
		sum[i]=0;
	REP(i,2*n)sum[ans[i]]+=i;
	REP(i,2*n)t[i]='0';
	t[2*n+1]='\0';
	int at=0;
	while(1){
		t[at]='1';
		if(at==2*n)break;
		else at=sum[ans[at]]-at+1;
	}
	if(strcmp(s,t)!=0){
		printf("%s vs %s\n",s,t);
		printf("ans:");
		REP(i,2*n)printf(" %d",ans[i]);
		puts("");
	}
}

void stress(){
	for(n=1;n<=10;++n){
		REP(mask,1<<(2*n-1)){
			s[0]='1';
			REP(i,2*n-1)
				s[i+1]='0'+((mask>>i)&1);
			s[2*n]='1';
			s[2*n+1]='\0';
			if(solve()){
				testans();
			}else if(SZ(lft)==SZ(rgt)&&
			SZ(none)%2==0&&SZ(both)%2==0){
			}
		}
	}
}

int main() {
	run();
	return 0;
}

Compiler output:
a.cc: In function 'bool solve()':
a.cc:85:17: error: 'c' was not declared in this scope
   85 |                 c=both[i+2],d=both[i+3];
      |                 ^
a.cc:85:29: error: 'd' was not declared in this scope
   85 |                 c=both[i+2],d=both[i+3];
      |                             ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define PB push_back
#define MP make_pair
#define SZ(v) ((int)(v).size())
#define FOR(i,a,b) for(int i=(a);i<(b);++i)  
#define REP(i,n) FOR(i,0,n)
#define FORE(i,a,b)for(int i=(a);i<=(b);++i)
#define REPE(i,n) FORE(i,0,n)
#define FORSZ(i,a,v) FOR(i,a,SZ(v))
#define REPSZ(i,v) REP(i,SZ(v))
typedef long long ll;
typedef unsigned long long ull;

ll gcd(ll a,ll b){
	return b==0?a:gcd(b,a%b);
}
const int MAXN=100000;
const int MAXS=2*MAXN-1;
int n;
char s[MAXS+3];
int ans[2*MAXN],nans;

void remove(vector<int> &lst,int val){
	int idx=0;
	while(idx<SZ(lst)&&lst[idx]!=val)++idx;
	assert(idx<SZ(lst));
	lst.erase(lst.begin()+idx);
}

vector<int> none,both,lft,rgt;

bool solve(){
	REP(i,2*n)ans[i]=-1;
	nans=0;
	none.clear(),both.clear();
	lft.clear(),rgt.clear();
	REP(i,2*n)
		if(s[i]=='0'&&s[i+1]=='0')none.PB(i);
		else if(s[i]=='0')rgt.PB(i);
		else if(s[i+1]=='0')lft.PB(i);
		else both.PB(i);
	if(SZ(lft)!=SZ(rgt)||SZ(none)%2!=0||
	SZ(both)%2!=0) return false;
	if(SZ(both)%4==2){
		int at=0;
		while(at<=2*n&&s[at]=='1')++at;
		if(at>2*n) return false;
		while(1){
			while(at+1<=2*n&&s[at+1]=='0')
				++at;
			if(at+1>2*n) return false;
			if(at+2<=2*n&&s[at+2]=='1')
				break;
			else at+=2;
		}
		int to=at+1;
		while(to<=2*n&&s[to]=='1')++to;
		if(to>2*n)return false;
		int idx=0;
		while(idx<SZ(both)&&at+1<=both[idx]
		&&both[idx]<=to-2)++idx;
		if(idx>=SZ(both)) return false;
		if(both[idx]<=at)
		while(idx+1<SZ(both)&&
		both[idx+1]+1<=at)++idx;
		int a=at,b=to-1,c=a+1,d=both[idx];
		ans[a]=ans[b]=++nans;
		ans[c]=ans[d]=++nans;
		remove(rgt,a);
		remove(lft,b);
		remove(both,c);
		remove(both,d);
	}
	REPSZ(i,lft){
		int a=lft[i],b=rgt[i];
		ans[a]=ans[b]=++nans;
	}
	for(int i=0;i<SZ(none);i+=2){
		int a=none[i],b=none[i+1];
		ans[a]=ans[b]=++nans;
	}
	for(int i=0;i<SZ(both);i+=4){
		int a=both[i],b=both[i+1];
		c=both[i+2],d=both[i+3];
		ans[a]=ans[c]=++nans;
		ans[b]=ans[d]=++nans;
	}
	return true;
}

void run(){
	scanf("%d%s",&n,s+1);
	s[0]='1';
	s[2*n]='1';
	s[2*n+1]='\0';
	if(!solve()){
		printf("No\n");
		return;
	}
	printf("Yes\n");
	REP(i,2*n){
		if(i!=0)
			printf(" ");
			printf("%d",ans[i]);
	}
	puts("");
}

char t[MAXS+3];
int sum[MAXN+1];
void testans(){
	FORE(i,1,n)
		sum[i]=0;
	REP(i,2*n)sum[ans[i]]+=i;
	REP(i,2*n)t[i]='0';
	t[2*n+1]='\0';
	int at=0;
	while(1){
		t[at]='1';
		if(at==2*n)break;
		else at=sum[ans[at]]-at+1;
	}
	if(strcmp(s,t)!=0){
		printf("%s vs %s\n",s,t);
		printf("ans:");
		REP(i,2*n)printf(" %d",ans[i]);
		puts("");
	}
}

void stress(){
	for(n=1;n<=10;++n){
		REP(mask,1<<(2*n-1)){
			s[0]='1';
			REP(i,2*n-1)
				s[i+1]='0'+((mask>>i)&1);
			s[2*n]='1';
			s[2*n+1]='\0';
			if(solve()){
				testans();
			}else if(SZ(lft)==SZ(rgt)&&
			SZ(none)%2==0&&SZ(both)%2==0){
			}
		}
	}
}

int main() {
	run();
	return 0;
}

Compiler output:
a.cc: In function 'bool solve()':
a.cc:85:17: error: 'c' was not declared in this scope
   85 |                 c=both[i+2],d=both[i+3];
      |                 ^
a.cc:85:29: error: 'd' was not declared in this scope
   85 |                 c=both[i+2],d=both[i+3];
      |                             ^