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

#include<bits/stdc++.h>
using namespace std;
#define N 200005
vector<int> v[N];
int fa[N],du[N],sg[N];
int n;
void calc(int u){
	sort(v[u].begin(),v[u].end());
	sg[u]=0;
	for(int i:v[u]) i==sg[u]? sg[u]++:0;
}
void tp(int u){
	calc(u);
	du[fa[u]]--;du[u]=-1;
	v[fa[u]].push_back(sg[u]);
	if(du[fa[u]]==0) tp(fa[u]);
}
vector<int> temp;
void DFS(int u,int top){
	temp.push_back(sg[u]);du[i]=-1; 
	if(fa[u]!=top) DFS(fa[u],top);
}
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++) scanf("%d",&fa[i]),du[fa[i]]++;
	for(int i=1;i<=n;i++)
		if(du[i]==0) tp(i);
	for(int i=1;i<=n;i++)
		if(du[i]==1) calc(i);
	for(int i=1;i<=n;i++)
		if(du[i]==1){
			DFS(i,i);
			sort(temp.begin(),temp.end());
			if(temp[0]==temp[temp.size()-1]&&temp.size()%2==1)
				return puts("IMPOSSIBLE"),0;
			temp.clear();
		}
	return puts("POSSIBLE"),0;
}

Compiler output:
a.cc: In function 'void DFS(int, int)':
a.cc:20:34: error: 'i' was not declared in this scope
   20 |         temp.push_back(sg[u]);du[i]=-1;
      |                                  ^
Language: C++

#include <cstdio>#include <cstring>#define MAXN 200010struct edge{	int to,next;	edge(int _to=0,int _next=0):to(_to),next(_next){}}e[MAXN];int n,root;int g[MAXN],nume;int p[MAXN];bool visit[MAXN];int f[MAXN];bool cnt[MAXN];void addEdge(int u,int v){	e[nume]=edge(v,g[u]);	g[u]=nume++;}void dfs(int x){	for(int i=g[x];~i;i=e[i].next)		if(e[i].to!=root) 			dfs(e[i].to);	for(int i=g[x];~i;i=e[i].next) 		if(f[e[i].to]>=0) 			cnt[f[e[i].to]]=1;	for(f[x]=0;cnt[f[x]];f[x]++);	for(int i=g[x];~i;i=e[i].next) 		if(f[e[i].to]>=0) 			cnt[f[e[i].to]]=0;}bool check(){	int x=p[root];	for(int i=g[x];~i;i=e[i].next)		cnt[f[e[i].to]]=1;	bool flag=1;	if(cnt[f[x]]) flag=0;	for(int i=0;i<f[x];i++) if(!cnt[i]) flag=0;	memset(cnt,0,sizeof cnt);	return flag;}bool gao(){	int x=1;	while(!visit[x]) visit[x]=1,x=p[x];	memset(visit,0,sizeof visit);	memset(f,-1,sizeof f);	root=x;	dfs(root);	if(check()) return 1;	int f0=f[p[x]];	memset(f,-1,sizeof f);	f[root]=f0;	dfs(root);	if(check()) return 1;	return 0;}int main(){	memset(g,-1,sizeof g);	scanf("%d",&n);	for(int i=1;i<=n;i++) scanf("%d",p+i),addEdge(p[i],i);	if(gao()) puts("POSSIBLE");	else puts("IMPOSSIBLE");}

Compiler output:
a.cc:1:18: warning: extra tokens at end of #include directive
    1 | #include <cstdio>#include <cstring>#define MAXN 200010struct edge{      int to,next;    edge(int _to=0,int _next=0):to(_to),next(_next){}}e[MAXN];int n,root;int g[MAXN],nume;int p[MAXN];bool visit[MAXN];int f[MAXN];bool cnt[MAXN];void addEdge(int u,int v){        e[nume]=edge(v,g[u]);   g[u]=nume++;}void dfs(int x){   for(int i=g[x];~i;i=e[i].next)          if(e[i].to!=root)                       dfs(e[i].to);   for(int i=g[x];~i;i=e[i].next)          if(f[e[i].to]>=0)                       cnt[f[e[i].to]]=1;      for(f[x]=0;cnt[f[x]];f[x]++);   for(int i=g[x];~i;i=e[i].next)          if(f[e[i].to]>=0)                       cnt[f[e[i].to]]=0;}bool check(){        int x=p[root];  for(int i=g[x];~i;i=e[i].next)          cnt[f[e[i].to]]=1;      bool flag=1;    if(cnt[f[x]]) flag=0;   for(int i=0;i<f[x];i++) if(!cnt[i]) flag=0;     memset(cnt,0,sizeof cnt);       return flag;}bool gao(){        int x=1;        while(!visit[x]) visit[x]=1,x=p[x];     memset(visit,0,sizeof visit);   memset(f,-1,sizeof f);  root=x; dfs(root);      if(check()) return 1;   int f0=f[p[x]]; memset(f,-1,sizeof f);  f[root]=f0;     dfs(root);      if(check()) return 1;   return 0;}int main(){   memset(g,-1,sizeof g);  scanf("%d",&n); for(int i=1;i<=n;i++) scanf("%d",p+i),addEdge(p[i],i);  if(gao()) puts("POSSIBLE");     else puts("IMPOSSIBLE");}
      |                  ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define ALL(x) (x).begin(),(x).end()
#define LL long long

using namespace std;

vector<int> G[200200];
vector<int> rG[200200];
vector<int> loop;
int used[200200];
bool isloop[200200];
int N;

vector<int> grundyP[200200];

bool dfs_findloop(int v){
    used[v]=1;
    bool res=false;
    for(int u:G[v]){
        if(used[v]==0){
            if(dfs_findloop(u))res=true;
        }else if(used[v]==1)res=true;
    }
    if(res)loop.push_back(v);
    used[v]=2;
    return res;
}

void add_G(int from,int to){
    G[from].push_back(to);
    rG[to].push_back(from);
}

int dfs_grundy(int v){
    set<int> used_g;
    for(int u:G[v])used_g.insert(dfs_grundy(u));
    int res=-1;
    while(true)if(used_g.count(++res)==0)return res;

}

int dfs_solve(int v,int k){
    used[v]=1;
    int rec =(k==grundyP[v][0] ? grundyP[v][1] : grundyP[v][0]);
    for(int u:rG[v])if((isloop[u])&&(used[u]==0))return dfs_solve(u,rec);
    return rec;
}


int main(){
    cin>>N;
    REP(i,N){
        int p;cin>>p;p--;
        add_G(p,i);
    }
    set<int> grundy[N];

    fill_n(used,N,0);
    fill_n(isloop,N,false);
    REP(i,N)if(used[v]==0)dfs_findloop(i);
    for(int v:loop)isloop[v]=true;
    for(int v:loop)
        for(int u:G[v])
            if(!isloop[u])
                grundy[v].insert(dfs_grundy(u));

    for(int v:loop){
        int res=-1;
        while(grundyP[v].size()<2){
            if(grundy[v].count(++res)==0)
                grundyP[v].push_back(res);
        }
    }

    int root=loop[0];
    fill_n(used,N,0);
    if(dfs_solve(root,-1)!=grundyP[root][0]){
        cout<<"POSSIBLE"<<endl;
    }else{
        fill_n(used,N,0);
        if(dfs_solve(root,grundyP[root][0])==grundyP[root][0]) {
            cout << "POSSIBLE" << endl;
        }else{
            cout<<"IMPOSSIBLE"<<endl;
        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:61:21: error: 'v' was not declared in this scope
   61 |     REP(i,N)if(used[v]==0)dfs_findloop(i);
      |                     ^
Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define ALL(x) (x).begin(),(x).end()
#define LL long long

using namespace std;

vector<int> G[200200];
vector<int> rG[200200];
vector<int> loop;
int used[200200];
bool isloop[200200];
int N;

vector<int> grundyP[200200];

bool dfs_findloop(int v){
    used[v]=1;
    bool res=false;
    for(int u:G[v]){
        if(used[v]==0){
            if(dfs_findloop(u))res=true;
        }else if(used[v]==1)res=true;
    }
    if(res)loop.push_back(v);
    used[v]=2;
    return res;
}

void add_G(int from,int to){
    G[from].push_back(to);
    rG[to].push_back(from);
}

int dfs_grundy(int v){
    set<int> used_g;
    for(int u:G[v])used_g.insert(dfs_grundy(u));
    int res=-1;
    while(true)if(used_g.count(++res)==0)return res;

}

int dfs_solve(int v,int k){
    used[v]=1;
    int rec =(k==grundyP[v][0] ? grundyP[v][1] : grundyP[v][0]);
    for(int u:rG[v])if((isloop[u])&&(!used[u]))return dfs_solve(u,rec);
    return rec;
}


int main(){
    cin>>N;
    REP(i,N){
        int p;cin>>p;p--;
        add_G(p,i);
    }
    set<int> grundy[N];

    fill_n(used,N,0);
    fill_n(isloop,N,false);
    REP(i,N)if(used[v]==0)dfs_findloop(i);
    for(int v:loop)isloop[v]=true;
    for(int v:loop)
        for(int u:G[v])
            if(!isloop[u])
                grundy[v].insert(dfs_grundy(u));

    for(int v:loop){
        int res=-1;
        while(grundyP[v].size()<2){
            if(grundy[v].count(++res)==0)
                grundyP[v].push_back(res);
        }
    }

    int root=loop[0];
    fill_n(used,N,0);
    if(dfs_solve(root,-1)!=grundyP[root][0]){
        cout<<"POSSIBLE"<<endl;
    }else{
        fill_n(used,N,0);
        if(dfs_solve(root,grundyP[root][0])==grundyP[root][0]) {
            cout << "POSSIBLE" << endl;
        }else{
            cout<<"IMPOSSIBLE"<<endl;
        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:61:21: error: 'v' was not declared in this scope
   61 |     REP(i,N)if(used[v]==0)dfs_findloop(i);
      |                     ^
Language: C++

#include <iostream>
#include <cstring>
#include <queue>
#include <vector>
using namespace std;
typedef long long ll;
int n;
vector<int> to[200001];
int from[200001];
bool cycle[200001];
bool visited[200001];
int label[200001];

int main(){
  cin >> n;
  for(int i=0;i<n;++i){
    label[i]=-1;
    int a;
    cin>>a;
    a--;
    from[i]=a;
    to[a].push_back(i);
  }
  
  int v = 0;
  visited[0]=true;
  while(true){
    if(visited[from[v]]){
      for(int w=from[v];w!=v;w=from[w])
	cycle[w]=true;
      cycle[v]=true;
      break;
    }
    v=from[v];
    visited[v]=true;
  }
  memset(visited,0,sizeof(visited));
  
  queue<int> Q;
  for(int i=0;i<n;++i)
    if(to[i].size()==0)
      Q.push(i);
  while(!Q.empty()){
    int q = Q.front(); Q.pop();
    if(!cycle[q]){
      int x=0;
      vector<int> tolabel;
      for(int t:to[q])
	if(label[t]!=-1)
	  tolabel.push_back(label[t]);
      sort(tolabel.begin(),tolabel.end());
      for(int i:tolabel){
	if(x==i)
	  ++x;
      }
      label[q]=x;
      Q.push(from[q]);
    }
  }

  int p = -1;
  for(int i=0;i<n;++i)
    if(cycle[i])
      p=i;
  if(p==-1){
    cout << "POSSIBLE" << endl;
  }
  else{
    vector<int> tolabel;
    for(int i:to[p])
      if(label[i]!=-1)
	tolabel.push_back(label[i]);
    sort(tolabel.begin(), tolabel.end());

    int x=0;

    for(int i:tolabel)
      if(i==x)
	++x;
    int y=x+1;
    for(int i:tolabel)
      if(i==y)
	++y;
    label[p]=x;
    bool flg1 = true;
    for(int w=from[p];w!=p;w=from[w]){
      int z=0;
      vector<int> Z;
      for(int i:to[w])
	Z.push_back(label[i]);
      sort(Z.begin(), Z.end());
      for(int i:Z)
	if(z==i)
	  ++z;
      label[w]=z;
    }
    tolabel.clear();
    for(int i:to[p])
      tolabel.push_back(label[i]);
    sort(tolabel.begin(), tolabel.end());
    int r=0;
    for(int i:tolabel)
      if(i==r)
	++r;
    if(r!=x)
      flg1 = false;
	
    bool flg2 = true;
    for(int i=0;i<n;++i)
      if(cycle[i])
	label[i]=-1;
    label[p]=y;
    
    for(int w=from[p];w!=p;w=from[w]){
      int z=0;
      vector<int> Z;
      for(int i:to[w])
	Z.push_back(label[i]);
      sort(Z.begin(), Z.end());
      for(int i:Z)
	if(z==i)
	  ++z;
      label[w]=z;
    }

    tolabel.clear();
    for(int i:to[p])
      tolabel.push_back(label[i]);
    sort(tolabel.begin(), tolabel.end());
    r=0;
    for(int i:tolabel)
      if(r==i)
	++r;
    if(r!=y)
      flg2=false;

    if(!flg1 && !flg2)
      cout << "IM";
    cout << "POSSIBLE" << endl;
  }
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:51:7: error: 'sort' was not declared in this scope; did you mean 'short'?
   51 |       sort(tolabel.begin(),tolabel.end());
      |       ^~~~
      |       short
a.cc:73:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   73 |     sort(tolabel.begin(), tolabel.end());
      |     ^~~~
      |     short
Language: C++

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

int n;
vector<int> out[200010];
int in[200010];
int cycle[200010];
int grundy[200010];
int st = -1;
const int CYCLE = 42;

int dfs(int x) {
	cycle[x] = 1;
	for(int i : out[x]) {
		if(cycle[i] == 1) {
			st = i;
			cycle[x] = CYCLE;
			return CYCLE;
		}
		else if(cycle[i] == 0) {
			if(dfs(i, x) == CYCLE) {
				cycle[x] = CYCLE;
				if(x == st) return 0;
				else return CYCLE;
			}
		}
	}
	cycle[x] = 2;
	return 0;
}

int getgrundy(int x) {
	set<int> s;
	for(int i : out[x])
		if(cycle[i] != CYCLE)
			s.insert(getgrundy(i));
	int ans = 0;
	auto it = s.begin();
	while(it != s.end()) {
		if(*it == ans) {
			++ans;
			++it;
		}
		else return grundy[x] = ans;
	}
	return grundy[x] = ans;
}

bool chk(int x, int val, int res) {
	if(x == st) return res == val;
	int nxt = -1;
	for(int i : out[x]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	return chk(nxt, grundy[nxt] + (grundy[nxt] == val), res);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	memset(cycle, 0, sizeof cycle);
	for(int i = 0; i < n; ++i){
		int x;
		cin >> x;
		--x;
		out[x].push_back(i);
		in[i] = x;
		if(x < i and in[x] == i) {
			st = i;
			cycle[x] = cycle[i] = CYCLE;
		}
	}
	for(int i = 0; st == -1 and i < n; ++i) if(cycle[i] == 0) dfs(i);
	for(int i = 0; i < n; ++i) if(cycle[i] == CYCLE) getgrundy(i);
	int nxt;
	for(int i : out[st]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	if(st == nxt or chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
	else if (chk(nxt, grundy[nxt] + ((grundy[st] + 1) == grundy[nxt]), grundy[st] + 1)) cout << "POSSIBLE" << endl;
	else cout << "IMPOSSIBLE" << endl;

}


Compiler output:
a.cc: In function 'int dfs(int)':
a.cc:21:31: error: too many arguments to function 'int dfs(int)'
   21 |                         if(dfs(i, x) == CYCLE) {
      |                            ~~~^~~~~~
a.cc:12:5: note: declared here
   12 | int dfs(int x) {
      |     ^~~
Language: C++

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

int n;
vector<int> out[200010];
int in[200010];
int cycle[200010];
int grundy[200010];
int st = -1;
const int CYCLE = 42;

int dfs(int x, int p) {
	cycle[x] = 1;
	for(int i : out[x]) {
		if(i != p) {
			if(cycle[i] == 1) {
				st = i;
				cycle[x] = CYCLE;
				return CYCLE;
			}
			else if(cycle[i] == 0) {
				if(dfs(i, x) == CYCLE) {
					cycle[x] = CYCLE;
					if(x == st) return 0;
					else return CYCLE;
				}
			}
		}
	}
	cycle[x] = 2;
	return 0;
}

int getgrundy(int x) {
	set<int> s;
	for(int i : out[x])
		if(cycle[i] != CYCLE)
			s.insert(getgrundy(i));
	int ans = 0;
	auto it = s.begin();
	while(it != s.end()) {
		if(*it == ans) {
			++ans;
			++it;
		}
		else return grundy[x] = ans;
	}
	return grundy[x] = ans;
}

bool chk(int x, int val, int res) {
	if(x == st) return res == val;
	int nxt = -1;
	for(int i : out[x]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	if(nxt == -1) return false;
	return chk(nxt, grundy[nxt] + (grundy[nxt] == val), res);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	memset(cycle, 0, sizeof cycle);
	for(int i = 0; i < n; ++i){
		int x;
		cin >> x;
		--x;
		if(i == x) return cout << "POSSIBLE" << endl, 0;
		out[x].push_back(i);
		in[i] = x;
		if(x < i and in[x] == i) {
			st = i;
			cycle[x] = cycle[i] = CYCLE;
		}
	}
	for(int i = 0; st == -1 and i < n; ++i) if(cycle[i] == 0) dfs(i, -1);
	for(int i = 0; i < n; ++i) {
		if(cycle[i] == CYCLE) getgrundy(i);
	}
	int nxt;
	for(int i : out[st]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	else if(chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
	else if (chk(nxt, grundy[nxt] + ((grundy[st] + 1) == grundy[nxt]), grundy[st] + 1)) cout << "POSSIBLE" << endl;
	else cout << "IMPOSSIBLE" << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:90:9: error: 'else' without a previous 'if'
   90 |         else if(chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
      |         ^~~~
Language: C++

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

int n;
vector<int> out[200010];
int in[200010];
int cycle[200010];
int grundy[200010];
int st = -1;
const int CYCLE = 42;

int dfs(int x, int p) {
	cycle[x] = 1;
	for(int i : out[x]) {
		if(i != p) {
			if(cycle[i] == 1) {
				st = i;
				cycle[x] = CYCLE;
				return CYCLE;
			}
			else if(cycle[i] == 0) {
				if(dfs(i, x) == CYCLE) {
					cycle[x] = CYCLE;
					if(x == st) return 0;
					else return CYCLE;
				}
			}
		}
	}
	cycle[x] = 2;
}

int getgrundy(int x) {
	set<int> s;
	for(int i : out[x])
		if(cycle[i] != CYCLE)
			s.insert(getgrundy(i));
	int ans = 0;
	auto it = s.begin();
	while(it != s.end()) {
		if(*it == ans) {
			++ans;
			++it;
		}
		else return grundy[x] = ans;
	}
	return grundy[x] = ans;
}

bool chk(int x, int val, int res) {
	if(x == st) return res == val;
	int nxt = -1;
	for(int i : out[x]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	if(nxt == -1) return false;
	return chk(nxt, grundy[nxt] + (grundy[nxt] == val), res);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	memset(cycle, 0, sizeof cycle);
	for(int i = 0; i < n; ++i){
		int x;
		cin >> x;
		--x;
		out[x].push_back(i);
		in[i] = x;
		if(in[x] == i) {
			st = i;
			cycle[x] = cycle[i] = CYCLE;
		}
	}
	for(int i = 0; st == -1 and i < n; ++i) if(cycle[i] == 0) dfs(i, -1);
	for(int i = 0; i < n; ++i) {
		if(cycle[i] == CYCLE) getgrundy(i);
	}
	for(int i : out[st]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	if(st == -1) cout << "IMPOSSIBLE" << endl;
	else if(chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
	else if (chk(nxt, grundy[nxt] + ((grundy[st] + 1) == grundy[nxt]), grundy[st] + 1)) cout << "POSSIBLE" << endl;
	else cout << "IMPOSSIBLE" << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:84:25: error: 'nxt' was not declared in this scope
   84 |                         nxt = i;
      |                         ^~~
a.cc:88:21: error: 'nxt' was not declared in this scope
   88 |         else if(chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
      |                     ^~~
a.cc: In function 'int dfs(int, int)':
a.cc:30:18: warning: control reaches end of non-void function [-Wreturn-type]
   30 |         cycle[x] = 2;
      |         ~~~~~~~~~^~~
Language: C++

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

int n;
vector<int> out[200010];
int in[200010];
int cycle[200010];
int grundy[200010];
int st;
const int CYCLE = 42;

int dfs(int x, int p) {
	cycle[x] = 1;
	for(int i : out[x]) {
		if(i != p or in[x] == i) {
			if(cycle[i] == 1) {
				st = i;
				cycle[x] = CYCLE;
				return CYCLE;
			}
			else if(cycle[i] == 0) {
				if(dfs(i, x) == CYCLE) {
					cycle[x] = CYCLE;
					if(x == st) return 0;
					else return CYCLE;
				}
			}
		}
	}
	cycle[x] = 2;
}

int getgrundy(int x) {
	set<int> s;
	for(int i : out[x])
		if(cycle[i] != CYCLE)
			s.insert(getgrundy(i));
	int ans = 0;
	auto it = s.begin();
	while(it != s.end()) {
		if(*it == ans) {
			++ans;
			++it;
		}
		else return grundy[x] = ans;
	}
	return grundy[x] = ans;
}

bool chk(int x, int val, int res) {
	if(x == st) return res == val;
	int nxt;
	for(int i : out[x]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	return chk(nxt, grundy[nxt] + (grundy[nxt] == val), res);
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	memset(cycle, 0, sizeof cycle);
	for(int i = 0; i < n; ++i){
		int x;
		cin >> x;
		--x;
		out[x].push_back(i);
		in[i] = x;
	}
	for(int i = 0; i < n; ++i) if(cycle[i] == 0) dfs(i, -1);
	for(int i = 0; i < n; ++i) {
		if(cycle[i] == CYCLE) getgrundy(i);
	}
	int nxt;
	for(int i : out[st]) {
		if(cycle[i] == CYCLE) {
			nxt = i;
		}
	}
	return cout << "POSSIBLE" << endl;
	if(chk(nxt, grundy[nxt] + (grundy[st] == grundy[nxt]), grundy[st])) cout << "POSSIBLE" << endl;
	else if (chk(nxt, grundy[nxt] + ((grundy[st] + 1) == grundy[nxt]), grundy[st] + 1)) cout << "POSSIBLE" << endl;
	else cout << "IMPOSSIBLE" << endl;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:83:35: error: cannot convert 'std::basic_ostream<char>::__ostream_type' {aka 'std::basic_ostream<char>'} to 'int' in return
   83 |         return cout << "POSSIBLE" << endl;
      |                ~~~~~~~~~~~~~~~~~~~^~~~~~~
      |                                   |
      |                                   std::basic_ostream<char>::__ostream_type {aka std::basic_ostream<char>}
a.cc: In function 'int dfs(int, int)':
a.cc:30:18: warning: control reaches end of non-void function [-Wreturn-type]
   30 |         cycle[x] = 2;
      |         ~~~~~~~~~^~~
Language: C++

#include<stdio.h>
#include<vector>
#include<algorithm>
using namespace std;
#define ran 222222
int n;
vector<int> e[ran];
int deg[ran];
int q[ran],lq;

vector<int> bad[ran];
int col[ran];

vector<int> _bad[ran];
int _col[ran];

void save(){
	for(int i=1; i<=n; i++){
		_bad[i] = bad[i];
		_col[i] = col[i];
	}
}
void rollback(){
	for(int i=1; i<=n; i++){
		bad[i] = _bad[i];
		col[i] = _col[i];
	}
}
bool chk(int x,int val,int cond){
	int y = x;
	while(true){
		int z;
		for(vector<int>::iterator it = e[y].begin(); it!=e[y].end(); it++){
			z = *it;
			if(col[z] == -1)break;
		}
		if(z == x){
			if(cond == -1)return col[y] != val;
			return col[y] == cond;
		}else{
			bad[z].push_back(y==x?val:col[y]);
			sort(bad[z].begin(),bad[z].end());
			bad[z].resize(unique(bad[z].begin(),bad[z].end())-bad[z].begin());
			for(col[z] = 0; col[z] < bad[z].size() && bad[z][col[z]] == col[z]; col[z]++);
			y = z;
		}
	}
}

int main(){
	scanf("%d",&n);
	for(int i=1; i<=n; i++){
		int x;
		scanf("%d",&x);
		e[i].push_back(x);
		deg[x] ++;
	}
	for(int i=1; i<=n; i++){
		if(deg[i] == 0){
			q[lq++] = i;
		}
	}
	memset(col,-1,sizeof(col));
	for(int i=0; i<lq; i++){
		int x = q[i];
		sort(bad[x].begin(),bad[x].end());
		bad[x].resize(unique(bad[x].begin(),bad[x].end())-bad[x].begin());
		for(col[x] = 0; col[x] < bad[x].size() && bad[x][col[x]] == col[x]; col[x]++);

		for(vector<int>::iterator it = e[x].begin(); it!=e[x].end(); it++){
			int y = *it;
			bad[y].push_back(col[x]);
			if(--deg[y] == 0){
				q[lq++] = y;
			}
		}
	}
	for(int i=1; i<=n; i++)if(col[i] == -1){
		int x = i;
		sort(bad[x].begin(),bad[x].end());
		bad[x].resize(unique(bad[x].begin(),bad[x].end())-bad[x].begin());

		int Z;
		for(Z = 0; Z < bad[x].size() && bad[x][Z] == Z; Z++);

		save();

		if(chk(x,Z,-1)){
			puts("POSSIBLE");
			return 0;
		}

		rollback();

		int Z1=Z;
		for(Z ++; Z-1 < bad[x].size() && bad[x][Z-1] == Z; Z++);
		if(chk(x,Z,Z1)){
			puts("POSSIBLE");
			return 0;
		}

		puts("IMPOSSIBLE");
		return 0;
	}
	puts("POSSIBLE");
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:63:9: error: 'memset' was not declared in this scope
   63 |         memset(col,-1,sizeof(col));
      |         ^~~~~~
a.cc:4:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    3 | #include<algorithm>
  +++ |+#include <cstring>
    4 | using namespace std;
Language: C++

#include<bits/stdc++.h>
using namespace std;
int n;
vector<vector<int>> edge;
vector<int> st;
vector<int> cir;
int pat=-1;
set<int> cirs;
vector<int> a;
int namori(int v){
    if(a[v]!=-1) return a[v];
    vector<int> ss;
    for(int i=0;i<edge[v].size();i++){
        int to=edge[v][i];
        if(!cirs.count(to)){
            ss.push_back(namori(to));
        }
    }
    if(ss.size()==0) return 0;
    sort(ss.begin(),ss.end());
    int res=ss[ss.size()-1]+1;
    for(int i=0;i<n;i++){
        if(i==0){
            if(ss[i]!=0) return a[v]=0;
        }
        else{
            if(ss[i-1]+1<ss[i]) return a[v]=ss[i-1]+1;
        }
    }
    return a[v]=res;
}

int namori2(int v,int aaa){
    if(a[v]!=-1) return a[v];
    vector<int> ss;
    ss.push_back(aaa);
    for(int i=0;i<edge[v].size();i++){
        int to=edge[v][i];
        if(!cirs.count(to)){
            ss.push_back(namori(to));
        }
    }
    if(ss.size()==0) return 0;
    sort(ss.begin(),ss.end());
    int res=ss[ss.size()-1]+1;
    for(int i=0;i<n;i++){
        if(i==0){
            if(ss[i]!=0) return a[v]=0;
        }
        else{
            if(ss[i-1]+1<ss[i]) return a[v]=ss[i-1]+1;
        }
    }
    return a[v]=res;
}
    

bool circuit(int v){
    if(st[v]==1){
        pat=v;
        return 1;;
    }
    st[v]=1;
    for(int i=0;i<edge[v].size();i++){
        bool ret=circuit(edge[v][i]);
    }
    return 0;
}
bool f=false;
bool dfs(int v){
    if(f&&v==pat){
        return true;
    }
    f=true;
    bool ret=false;
    for(int i=0;i<edge[v].size();i++){
        ret|=dfs(edge[v][i]);
    }
    if(ret){
        cir.push_back(v);
    }
    return ret;
}

int main(){
    cin>>n;
    a.resize(n,-1);
    edge.resize(n);
    for(int i=0;i<n;i++){
        int p;cin>>p;
        p--;
        edge[p].push_back(i);
    }
    st.resize(n,0);
    for(int i=0;i<n;i++){
        if(!st[i]) circuit(i);
    }

    if(pat==-1){
        cout<<"POSSIBLE"<<endl;
        return 0;
    }

    if(!dfs(pat)){
        cout<<"POSSIBLE"<<endl;
        return 0;
    }
    
    for(int i=0;i<cir.size();i++) cirs.insert(cir[i]);
    vector<int> a(n);
    for(int i=0;i<cir.size();i++){
        namori(cir[i]);
    }
    vector<int> b(cir.size());
    b[0]=a[cir[0]];
    for(int i=1;i<cir.size();i++){
        b[i]=namori2(cir[i],b[i-1]);
    }    
    if(b[0]!=b[n-1]){
        cout<<"POSSIBLE"<<endl;
        return 0;
    }
    b[0]=a[cir[0]]+1;
    for(int i=1;i<cir.size();i++){
        b[i]=namori2(cir[i],b[i-1]);
    }
    if(b[0]!=b[n-1]){
        cout<<"POSSIBLE"<<endl;
        return 0;
    }
    cout<<"IMPOSSIBLE"<<endl;
 

Compiler output:
a.cc: In function 'int main()':
a.cc:131:30: error: expected '}' at end of input
  131 |     cout<<"IMPOSSIBLE"<<endl;
      |                              ^
a.cc:85:11: note: to match this '{'
   85 | int main(){
      |           ^
Language: C++

#include <iostream>
#include <vector>
#include <queue>
using namespace std;


int n;
vector<int> adj[200200];
int sol[200200];
int deg[200200];
int arr[200200];

int mex(vector<int> a){
	sort(a.begin(),a.end());
	for(int i=0;i<a.size();i++){
		if(a[i] != i)return i;
	}
	return (int)a.size();
}
queue<int> bf;

pair<int,int> cycle[200200];

int h=0;
int main(){
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		sol[i]=-1;
		int x;
		scanf("%d",&x);
		arr[i]=x;
		deg[x]++;
		adj[x].push_back(i);
	}
	for(int i=1;i<=n;i++){
		if(deg[i]==0){
			bf.push(i);
		}
	}
	while(!bf.empty()){
		int nd=bf.front();
		bf.pop();

		vector<int> g;
		for(int i=0;i<adj[nd].size();i++){
			g.push_back(sol[adj[nd][i]]);
		}
		sol[nd] = mex(g);
		deg[arr[nd]] -- ;
		if(deg[arr[nd]] == 0 ){
			bf.push(arr[nd]);
		}
	}
	int st,cnt_all=0;
	for(int i=1;i<=n;i++){
		if(sol[i]!=-1)continue;
		st=i;
		cnt_all++;
	}
	int mn=1<<20,cnt=0,prv=1<<20;
	for(int i=1;i<=n;i++){
		if(sol[i]!=-1)continue;
		vector<int> g;
		for(int j=0;j<adj[i].size();j++){
			int ch=adj[i][j];
			if(sol[ch]==-1)continue;
			g.push_back(sol[ch]);
		}
		int mxxx=mex(g);
		if(mn==mxxx){
			cnt++;
		} else if( mxxx < mn){
			cnt = 1; 
			mn = mxxx;
		}
	}
	if( cnt_all % 2 && cnt == cnt_all){
		cout<<"IMPOSSIBLE"<<endl;
	} else {
		cout<<"POSSIBLE"<<endl;
	}
	return 0;

	/*
	bool is_first=true;
	while(true){
		vector<int> g;
		for(int j=0;j<adj[st].size();j++){
			int ch=adj[st][j];
			if(sol[ch]==-1)continue;
			g.push_back(sol[ch]);
		}
		int mxxx=mex(g);
		if(mxxx==mn && mxxx != prv && !is_first){
			break;
		} else {
			st= arr[st];
			prv= mxxx;
		}
		is_first=false;
	}

	bool ok=true;
	sol[st] = mn;
	int end= st;
	st=arr[st];
	while(st != end){
		vector<int> g;
		for(int j=0;j<adj[st].size();j++){
			int ch=adj[st][j];
			if(sol[ch]==-1)continue;
			g.push_back(sol[ch]);
		}

		int mxxx= mex(g);

		
	}
	*/
}

Compiler output:
a.cc: In function 'int mex(std::vector<int>)':
a.cc:14:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   14 |         sort(a.begin(),a.end());
      |         ^~~~
      |         short
Language: C++

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

typedef pair<int, int> pii;
typedef long long ll;
typedef vector<int> vi;

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define ALL(c) (c).begin(),(c).end()

int N;
vi g[200010];
int pr[200010];
int gr[200010];
int ot[200010];
set<int> st[200010];

int main() {
	cin >> N;

	rep(i, N) {
		int p;
		cin >> p;
		--p;
		g[p].pb(i);
		pr[i] = p; 
	}

	queue<int> que;

	memset(gr, -1, sizeof(gr));

	rep(i, N) {
		ot[i] = (int)g[i].size();
		if (ot[i] == 0) {
			que.push(i);
		}
	}

	while (!que.empty()) {
		int v = que.front(); que.pop();
		int x = 0;
		while (st[v].count(x)) ++x;
		gr[v] = x;
		
		if (--ot[pr[v]] == i) {
			que.push(pr[v]);
		}

		st[pr[v]].insert(x);
	}

	int rt;
	rep(i, N) {
		if (gr[i] == -1) {
			rt = i;
			break;
		}
	}

	vi cand;

	rep(i, N) {
		if (!st[rt].count(i)) {
			cand.pb(i);
			if (cand.size() == 2) {
				break;
			}
		}
	}

	bool ok = 0;

	rep(ii, 2) {
		gr[rt] = cand[ii]; 
		int v = rt;

		while (pr[v] != rt) {
			int x = 0;
			while (st[pr[v]].count(x) || gr[v] == x) ++x;
			gr[pr[v]] = x;
			v = pr[v];
		}

		int x = 0;

		set<int> ss;
		for (int to : g[rt]) {
			ss.insert(gr[to]);
		}

		while (ss.count(x)) ++x;
		if (gr[rt] == x) {
			ok = 1;
			break;
		}
	}

	puts(ok ? "POSSIBLE" : "IMPOSSIBLE");

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:52:36: error: 'i' was not declared in this scope
   52 |                 if (--ot[pr[v]] == i) {
      |                                    ^
Language: C++

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long lint;
typedef pair<lint, lint> pi;
const int MAXN = 200005;

vector<int> gph[MAXN];
int n, a[MAXN], deg[MAXN];
int g1[MAXN], g2[MAXN];
int ans[MAXN];

int dfs(int x){
	set<int> s;
	for(auto &i : gph[x]){
		s.insert(dfs(i));
	}
	for(int i=0; ; i++){
		if(s.find(i) == s.end()) return i;
	}
}

bool solve(int x){
	int prv = x;
	for(int j=a[x]; ; j=a[j]){
		int tmp = (ans[prv] == g1[j] ? g2[j] : g1[j]);
		if(j == x){
			return tmp == ans[j];
		}
		ans[j] = tmp;
		prv = j;
	}
}

int main(){
	scanf("%d",&n);
	for(int i=1; i<=n; i++){
		scanf("%d",&a[i]);
		gph[a[i]].push_back(i);
		deg[a[i]]++;
	}
	queue<int> que;
	for(int i=1; i<=n; i++) if(!deg[i]) que.push(i);
	while(!que.empty()){
		int x = que.front();
		que.pop();
		deg[a[x]]--;
		if(!deg[a[x]]) que.push(a[x]);
	}
	int piv = 0;
	for(int i=1; i<=n; i++){
		if(!deg[i]) continue;
		piv = i;
		set<int> s;
		for(auto &j : gph[i]){
			if(!deg[j]) s.insert(dfs(j));
		}
		int cnt = 0;
		for(int j=0; ; j++){
			if(s.find(j) == s.end()){
				if(cnt == 0) g1[i] = j;
				if(cnt == 1) g2[i] = j;
				cnt++;
			}
			if(cnt == 2) break;
		}
	}
	ans[piv] = g1[piv];
	if(solve(piv)){
		puts("POSSIBLE");
		return 0;
	}
	ans[piv] = g2[piv];
	if(solve(piv)){
		puts("POSSIBLE");
		return 0;
	}
	puts("IMPOSSIBLE");
}


Compiler output:
a.cc:1:10: fatal error: aliens.h: No such file or directory
    1 | #include "aliens.h"
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
#include <cmath>
#include <limits>
#include <list>
#define ALL(x) (x).begin(),(x).end()
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define int_INF 2147483647
#define pint_INF 2000000000
#define ll_INF 	9223372036854775807
#define MOD 1000000007
#define vi vector<int>
#define vvi vector<vector<int>>
#define vvll vector<vector<long long>>
#define vvc vector<vector<char>>
#define vll vector<long long>
#define pii pair<int,int>
#define vpii vector<pair<int,int>>
#define sysp system("PAUSE")
#define pno cout << "no" << endl
#define pyes cout << "yes" << endl
#define pYes cout << "Yes" << endl
#define pNo cout << "No" << endl
#define pNO cout << "NO" << endl
#define pYES cout << "YES" << endl
#define endl "\n"
#define pi 3.14159265358979
using namespace std;
using ll = long long;
#define int ll
int gcd(int a, int b) {
	if (a > b) {
		int c = a;
		a = b;
		b = c;
	}
	if (a == 0) {
		return b;
	}

	return gcd(b % a, a);
}

int gcd_of_all(vi v){
  int l = v.size();

  int temp = v[0];
  for(int i = 0; i < l ; i++){
    temp = gcd(temp,v[i]);
  }

  return temp;
}

int main(){
    int N,K; cin >> N >> K;
    vi A(N); rep(i,N) cin >> A[i];
    int g = gcd_of_all(A);
    bool flag = false;
    for(int i = 0; i < N; i++){
        if(A[i] - K >= 0){
            if((A[i] - K)%g == 0){
                flag = true;
                break;
            }
        }
    }
    if(flag){
        cout << "POSSIBLE" << endl;
    }else{
        cout << "IMPOSSIBLE" << endl;
    }
    sysp;
}

Compiler output:
a.cc:45:13: error: '::main' must return 'int'
   45 | #define int ll
      |             ^~
a.cc:70:1: note: in expansion of macro 'int'
   70 | int main(){
      | ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i, n) for (ll i = 0; i < n; ++i)
#define P pair<ll, ll>
#define Graph vector<vector<ll>>
#define fi first
#define se second
constexpr ll mod = 1000000007;
constexpr ll INF = (1ll << 60);
constexpr double pi = 3.14159265358979323846;
template <typename T>
inline bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <typename T>
inline bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}

int main() {
    ll N, K;
    cin >> N >> K;
    vector<ll> A(N);
    rep(i, N) cin >> A[i];

    bool check = false;
    sort(A.begin(), A.end());
    rep(i, N) {
        if (A[i] % A[0] != 0 && A[n - 1] >= K) check = true;
    }

    if (check)
        cout << "POSSIBLE\n";
    else
        cout << "IMPOSSIBLE\n";

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:38:35: error: 'n' was not declared in this scope
   38 |         if (A[i] % A[0] != 0 && A[n - 1] >= K) check = true;
      |                                   ^
Language: C++

#include <bits/stdc++.h>
#include <cstring>
#include <ctype.h>
#include<stdlib.h>

#define flin            freopen("input.txt", "r", stdin); 
#define flout           freopen("output.txt", "w", stdout);
#define ll              long long
#define ull             unsigned long long
#define fastio          ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define nl              '\n'
#define nll             '\0'
#define pb              push_back
#define bdyptb          return 0;
#define sorted(x)       sort(x.begin(), x.end())
#define reversed(x)     reverse(x.begin(), x.end())
#define all(x)          x.begin(), x.end()
#define mset(a, b)      memset(a, b, sizeof(a));
#define testcase        ll t,tt; cin>>tt; for(t=1;t<=tt;t++)

#define pi acos(-1.00)   
#define mx 1000007

using namespace std;
int findGCD(int arr[], int n) 
{ 
    int result = arr[0]; 
    for (int i = 1; i < n; i++) 
    { 
        result = _gcd(arr[i], result); 
  
        if(result == 1) 
        { 
           return 1; 
        } 
    } 
    return result; 
}
int main()
{
    fastio;
    int n,k;
    cin>>n>>k;
    int a[n];
    
    for(int i=0; i<n; i++)
    {
        cin>>a[i];
       
    }


    int g=findGCD(a,n);

    if(g%k==0 and k<=*max_element(a,a+n))cout<<"POSSIBLE\n";
    else cout<<"IMPOSSIBLE\n";

    bdyptb;
}

Compiler output:
a.cc: In function 'int findGCD(int*, int)':
a.cc:30:18: error: '_gcd' was not declared in this scope
   30 |         result = _gcd(arr[i], result);
      |                  ^~~~
Language: C++

#include <numeric>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>

using namespace std;

using ll = long long;

#define REP(i,n) for(ll i=0;i<(ll)(n);i++)
#define REPD(i,n) for(ll i=n-1;i>=0;i--)
#define FOR(i,a,b) for(ll i=a;i<=(ll)(b);i++)
#define FORD(i,a,b) for(ll i=a;i>=(ll)(b);i--)

#define input(...) __VA_ARGS__; in(__VA_ARGS__)

#if __has_include("debugger.cpp")
  #include "debugger.cpp"
#else
void print() {
  std::cout << std::endl;
}

template <class Head, class... Tail>
void print(Head&& head, Tail&&... tail) {
  print__(head);
  if (sizeof...(tail) > 0) cout << " ";
  print(std::forward<Tail>(tail)...);
}
# endif

void in() { }

template <class Head, class... Tail>
void in(Head&& head, Tail&&... tail) {
  cin >> head;
  in(std::forward<Tail>(tail)...);
}

int main() {
  ll input(n, k);
  vector<ll> a(n);
  REP(i, n) cin >> a[i];
  ll p = a[0];
  REP(i, n - 1) {
    p = gcd(p, a[i + 1]);
  }
  print(k % p == 0 ? "POSSIBLE" : "IMPOSSIBLE");
}

Compiler output:
a.cc: In instantiation of 'void print(Head&&, Tail&& ...) [with Head = const char*; Tail = {}]':
a.cc:52:8:   required from here
   52 |   print(k % p == 0 ? "POSSIBLE" : "IMPOSSIBLE");
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:30:10: error: 'print__' was not declared in this scope; did you mean 'printf'?
   30 |   print__(head);
      |   ~~~~~~~^~~~~~
      |   printf
Language: C++

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
const ll mod=1000000007;
const int dx[4] = { 1, 0, -1, 0 };
const int dy[4] = { 0, 1, 0, -1 };
int main() {
ll n,k;
cin>>n>>k;
ll t[n]={};
ll a=0;
ll b=0;
for(ll i=0; i<n; i++){
cin>>t[i];}
sort(t,t+n);
if(t[n-1]<k){
cout<<"IMPOSSIBLE"<<endl;}
else{
  
for(ll i=0; i<n; i++){
if(t[i]>=k){
a=i;
break;}}
if(t[a]==k){
cout<<"POSSIBLE"<<endl;}
else{
  
for(ll i=1; i*i<=k; i++){
if(k%i==0){
bas++;
a=i;
while(t[a]<=r&&b<c){
b++;
a++;
if(a==n)break;}
i=a-1;
b=0;}
cout<<bas<<endl;}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:1: error: 'bas' was not declared in this scope; did you mean 'abs'?
   31 | bas++;
      | ^~~
      | abs
a.cc:33:13: error: 'r' was not declared in this scope
   33 | while(t[a]<=r&&b<c){
      |             ^
a.cc:33:18: error: 'c' was not declared in this scope
   33 | while(t[a]<=r&&b<c){
      |                  ^
a.cc:39:7: error: 'bas' was not declared in this scope; did you mean 'abs'?
   39 | cout<<bas<<endl;}
      |       ^~~
      |       abs
a.cc:39:18: error: expected '}' at end of input
   39 | cout<<bas<<endl;}
      |                  ^
a.cc:27:5: note: to match this '{'
   27 | else{
      |     ^
a.cc:39:18: error: expected '}' at end of input
   39 | cout<<bas<<endl;}
      |                  ^
a.cc:19:5: note: to match this '{'
   19 | else{
      |     ^
a.cc:39:18: error: expected '}' at end of input
   39 | cout<<bas<<endl;}
      |                  ^
a.cc:8:12: note: to match this '{'
    8 | int main() {
      |            ^
Language: C++

#include<iostream>
using namespace std;

int balls[100005];

int findFPB(int a, int b){
   if(b == 0) return a;
   return findFPB(b, a%b);
}

int main(){
    int N, K, maks = 0, fpb;

    cin >> N >> K;
    for(int i=1; i<=N; i++){
        cin >> balls[i];

        if (balls[i] > maks) maks = balls[i];
        if (balls[i] == K) udahADA = true;

        if (i == 1) fpb = balls[i];
        if (i >= 2 && fpb != 1){
            fpb = findFPB(balls[i], fpb);
        }
    }

    if(K > maks){
        cout << "IMPOSSIBLE" << endl;
    } else if(K % fpb == 0){
        cout << "POSSIBLE" << endl;
    } else{
        cout << "IMPOSSIBLE" << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:28: error: 'udahADA' was not declared in this scope
   19 |         if (balls[i] == K) udahADA = true;
      |                            ^~~~~~~
Language: C

#include <bits/stdc++.h>
using namespace std;
#define rep(i, s, e) for (int i = s; i < e; ++i)
#define sort_(a) stable_sort(a.begin(), a.end())
#define rsort(a) stable_sort(a.rbegin(), a.rend())
#define sum(a) accumulate(a.begin(), a.end(), 0LL)
#define join(a, d) accumulate(a.begin() + 1, a.end(), a[0], [](string s, string t) {return s + d + t;})
#define all(a) a.begin(), a.end()
// #define __lcm(a, b) std::__detail::__lcm(a, b)
typedef long long ll;
const long mod = 1e9 + 7;

ll lcm(ll x, ll y) {
    return x / __gcd(x, y) * y;
}

int main(void) {
#ifdef DEBUG
  freopen("input.txt", "r", stdin);
#endif

  ios_base::sync_with_stdio(false);
  cin.tie(0);

  long N, K;
  cin >> N >> K;
  vector<long> A(N);
  rep(i, 0, N) cin >> A[i];
  long maxa = accumulate(all(A), A[0], [](long x, long y) {return max(x, y);});
  if (maxa < K) {
    cout << "IMPOSSIBLE" << endl;
    return 0;
  }
  long gcd1 = accumulate(all(A), A[0], [](long x, long y) {return __gcd(x, y);});
  long gcd2 = __gcd(gcd1, K);
  if (gcd1 == gcd2) {
    cout << "POSSIBLE" << endl;
  } else {
    cout << "IMPOSSIBLE" << endl;
  }
  return 0;
}


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

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
using namespace std;

int main(){
  int n, k, a;
  cin >> n >> k;
  vector<int>a(n);
  int g=0, m=1e9+7;
  for(int i=0; i<n; i++){
    cin >> a;
    g = gcd(g, a);
    m = max(m, a);
  }
  if(m-k>=0 && (m-k)%g==0)cout << "POSSIBLE";
  else cout << "IMPOSSIBLE";
  return 0;
}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:10:14: error: conflicting declaration 'std::vector<int> a'
   10 |   vector<int>a(n);
      |              ^
a.cc:8:13: note: previous declaration as 'int a'
    8 |   int n, k, a;
      |             ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vvi = vector<vector<int>>;
using vvvi = vector<vector<vector<int>>>;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using vvvl = vector<vector<vector<ll>>>;
#define FOR(i, m, n) for (int i = (m); i < (n); i++)
#define FORR(i, m, n) for (int i = (m); i >= (n); i--)
#define REP(i, n) FOR(i, 0, (n))
#define REPR(i, n) FORR(i, (n) - 1, 0)
#define REP1(i, n) FOR(i, 1, (n) + 1)
#define REPS(c, s) for (char c : s)
#define ALL(c) (c).begin(), (c).end()
#define SORT(c) sort(ALL(c))
#define REV(c) reverse(ALL(c))
#define sz(v) (int)v.size()
#define endl '\n'
template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
template<class T> inline void prn(vector<T>& v) {int n = sz(v); REP(i, n) cout << v[i] << ' ';}
template<class T> inline void printv(vector<T>& v) {int n = sz(v); REP(i, n) cout << v[i] << (i == n - 1 ? endl : ' ');}
template<class T> inline void printvv(vector<vector<T>>& v) {for (auto u : v) printv(u);}
template<class T> inline void printlnv(vector<T>& v) {int n = sz(v); REP(i, n) cout << v[i] << endl;}
const int MOD = 1000000007;
const int INF = 1000000001;
const ll LINF = 1000000001000000001LL;
 
void solve();
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(numeric_limits<double>::max_digits10);
    solve();
    return 0;
}

void solve() {
    int n, k;
    int a;
    cin >> a;
    int mx = a;
    int g = a;
    REP1(i, n - 1) {
        cin >> a;
        chmax(mx, a);
        g = __gcd(g, a)
    }
    if (k <= mx and k % g == 0) cout << "POSSIBLE" << endl;
    else cout << "IMPOSSIBLE" << endl;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:52:24: error: expected ';' before '}' token
   52 |         g = __gcd(g, a)
      |                        ^
      |                        ;
   53 |     }
      |     ~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define FOR(i,l,r) for(i=l;i<r;i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(x) x.begin(),x.end()
#define P pair<ll,ll>
#define F first
#define S second
signed main(){
  ll N,K,i,a;cin>>N>>K;cin>>A;
  REP(i,N-1){cin>>a;A=__gcd(A,a);}
  if(K%A)cout<<"POSSIBLE"<<endl;
  else cout<<"IMPOSSIBLE"<<endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:29: error: 'A' was not declared in this scope
   11 |   ll N,K,i,a;cin>>N>>K;cin>>A;
      |                             ^
Language: C++

#include <iostream>

using namespace std;
typedef long long ll;

const int MAXN = 1e9+10;

int n;
ll A[MAXN];
ll k;

ll gcd(ll x, ll y) {
  if (x < y) {
    swap(x, y);
  }
  if (y == 0) {
    return x;
  }
  return gcd(y, x % y);
}

void solve() {
  ll d = A[0];
  for (int i=0;i<n;i++) {
    d = gcd(d, A[i]);
  }
  for (int i=0;i<n;i++) {
    if ((k - A[i]) % d == 0) {
      cout << "POSSIBLE" << endl;
      return;
    }
  }
  cout << "IMPOSSIBLE" << endl;
}

int main() {
  cin >> n >> k;
  for (int i=0;i<n;i++) {
    cin >> A[i];
  }
  solve();
}


Compiler output:
/tmp/cchBcmcr.o: in function `solve()':
a.cc:(.text+0xc6): relocation truncated to fit: R_X86_64_PC32 against symbol `k' defined in .bss section in /tmp/cchBcmcr.o
/tmp/cchBcmcr.o: in function `main':
a.cc:(.text+0x186): relocation truncated to fit: R_X86_64_PC32 against symbol `k' defined in .bss section in /tmp/cchBcmcr.o
collect2: error: ld returned 1 exit status
Language: C

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

                            Online C Compiler.
                Code, Compile, Run and Debug C program online.
Write your code in this editor and press "Run" button to compile and execute it.

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

#include <stdio.h>
int getGcd(int, int);

int getGcd(int a, int b){
    if(a==0 || a==b){
        return b;
    }
    if(a>=b){
        return getGcd(a%b, b);
    }
    return getGcd(b, a);
}

int main()
{
    
    int n, k, a, gcd;
    
    scanf("%d", &n);
    scanf("%d", &k);

    gcd = 0;
	max_num = 0;
    for(int i=0;i<n;i++){
        scanf("%d", &a);
        gcd = getGcd(gcd, a);
        if(max_num<=a){
			max_num = a;
		}
    }
	
	//Can we get the number k by performing subtractions with the n numbers
	if(k%gcd == 0 & gcd>0 & max_num >= k){
		printf("POSSIBLE");	
	}
	else{
		printf("IMPOSSIBLE");
	}
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:31:9: error: 'max_num' undeclared (first use in this function)
   31 |         max_num = 0;
      |         ^~~~~~~
main.c:31:9: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main() {
	ios_base::sync_with_stdio(false); cin.tie(nullptr);
  	int N, K;
  	cin >> N >> K;
  	int mx = 0, g = 0;
  while (N--) {
  	int x;
    cin >> x;
    g = __gcd(g, x);
    mx = max(mx, x);
  }
  if (K % g == 0 && k <= mx) cout << "POSSIBLE\n";
  else cout << "IMPOSSIBLE\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:21: error: 'k' was not declared in this scope
   16 |   if (K % g == 0 && k <= mx) cout << "POSSIBLE\n";
      |                     ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0;i<n;i++)
#define erep(i,n) for(int i = 0;i<=n;i++)
#define rep1(i,n) for(int i = 1;i<n;i++)
#define erep1(i,n) for(int i = 1;i<=n;i++)
typedef long long ll;
#define vint vector<int>
#define vvint vector<vector<int>>
#define vstring vector<string>
#define vll vector<ll>
#define vbool vector<bool>
#define INF 1000000009

ll gcm(ll a,ll b){
  if(a < b) swap(a,b);
  if(b == 0) return a;
  return gcm(a%b,b);
}

ll main(){
  ll n,k;
  cin >> n >> k;
  ll b;
  cin >> b;
  ll ag = b;
  rep(i,n){
    ll a;
    cin >> a;
    ag = gcm(ag,a);
    b = max(b,a);
  }
  if(k < b && k & ag == 0) cout << "POSSIBLE" << endl;
  else cout << "IMPOSSIBLE" << endl;
}


Compiler output:
a.cc:21:1: error: '::main' must return 'int'
   21 | ll main(){
      | ^~