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

int main() {
  int n; ll k; cin >>n>>k;
  vector<int> A(n);
  vector<int> cnt(n);
  vector<int> t = {0};
  rep(i,n) {
    cin>>A[i];
    A[i]--;
  }
  int now = 0;
  cnt[now] = 1;
  rep(i,n+1) {
    now = A[now];
    if (++cnt[now]>=2) break;
    t.push_back(now);
  }
  int p;
  rep(i,t.size()) {
    if (t[i] == now) {p = i; break;}
  }
  int d = t.size() - p;
  if (k<p) cout << t[k]+1 << endl;
  else cout << t[k%d]+1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:10: error: 'll' was not declared in this scope
    2 |   int n; ll k; cin >>n>>k;
      |          ^~
a.cc:2:16: error: 'cin' was not declared in this scope
    2 |   int n; ll k; cin >>n>>k;
      |                ^~~
a.cc:2:25: error: 'k' was not declared in this scope
    2 |   int n; ll k; cin >>n>>k;
      |                         ^
a.cc:3:3: error: 'vector' was not declared in this scope
    3 |   vector<int> A(n);
      |   ^~~~~~
a.cc:3:10: error: expected primary-expression before 'int'
    3 |   vector<int> A(n);
      |          ^~~
a.cc:4:10: error: expected primary-expression before 'int'
    4 |   vector<int> cnt(n);
      |          ^~~
a.cc:5:10: error: expected primary-expression before 'int'
    5 |   vector<int> t = {0};
      |          ^~~
a.cc:6:7: error: 'i' was not declared in this scope
    6 |   rep(i,n) {
      |       ^
a.cc:6:3: error: 'rep' was not declared in this scope
    6 |   rep(i,n) {
      |   ^~~
a.cc:11:3: error: 'cnt' was not declared in this scope; did you mean 'int'?
   11 |   cnt[now] = 1;
      |   ^~~
      |   int
a.cc:18:9: error: 't' was not declared in this scope
   18 |   rep(i,t.size()) {
      |         ^
a.cc:22:12: error: 'cout' was not declared in this scope
   22 |   if (k<p) cout << t[k]+1 << endl;
      |            ^~~~
a.cc:22:30: error: 'endl' was not declared in this scope
   22 |   if (k<p) cout << t[k]+1 << endl;
      |                              ^~~~
a.cc:23:8: error: 'cout' was not declared in this scope
   23 |   else cout << t[k%d]+1 << endl;
      |        ^~~~
a.cc:23:28: error: 'endl' was not declared in this scope
   23 |   else cout << t[k%d]+1 << endl;
      |                            ^~~~
Language: C++

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

long long k;
int n,now=1,a[223456][60];
int d(int now,int k){
  a[now][k]||a[now][k]=d(d(now,k-1),k-1);
  return a[now][k];
}

int main(){
  cin>>n>>k;
  for(int i=1;i<=n;i++)cin>>a[i][0];
  for(int i=0;i<60;i++)if((k>>i)&1)now=d(now,i);
  cout<<now<<endl;
}


Compiler output:
a.cc: In function 'int d(int, int)':
a.cc:7:12: error: lvalue required as left operand of assignment
    7 |   a[now][k]||a[now][k]=d(d(now,k-1),k-1);
      |   ~~~~~~~~~^~~~~~~~~~~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <map>
#include <fstream>
#include <set>
#include <stack>
#include <queue>
#include <list>
using namespace std;
typedef long long int64;
typedef vector<int> vec;
typedef vector<int64> vec64;
#define db(x) cout << "> " << #x << ": " << x << "\n";
#define ss cout << " ";
#define ct(x) cout << x;
#define nn cout << "\n";
#define cts(x) cout << x << " ";
#define ctn(x) cout << x << "\n";
// // // // // // // // // // // // // // // // // // //
int64 q, n;

void solve(){

    return;
}


int main(){
    int64 n,k;
    cin >> n >> k;
    vec to (n + 1);
    for (int i = 1; i <= n; i++){
        cin >> to[i];
    }
    map <int,bool> mp;
    int last =1;
    vec af;
    bool flag = 0;
    mp[1] = 1;
    while (true){
        int now = to[last];
        if (!mp[now]){
            mp[now] =1;
            af.push_back(now);
        }
        else{
            last = now;
            break;
        }
        last = now;
    }
    int last2 = 1;
    while (true){
        if (k == 0){
            ctn(last);
            return;
        }
        if (last2 == last){
            break;
        }
        else{
            k--;
        }
        last2 = to[last2];
    }
    // for (auto i: af){
    //     cts(i);
    // }
    // nn;
    if (k < 0){

    }
    ctn(af[k % af.size()]);
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:58:13: error: return-statement with no value, in function returning 'int' [-fpermissive]
   58 |             return;
      |             ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
typedef long long ll;
int main(){
    ll n,m,A[200010];
    cin>>n >> m;
  
    rep(i,n)
      cin>>A[i];
  
    vector<int> c;
  vector<int> idx(n+1,-1);
  
  int k = 1, l = 0;
  {
    int a = 1;
    while(idx[a] == -1){
      idx[a] = c.size();
      c.push_back(a);
      a = A[a-1];
    }
    k = c.size() - idx[a];
    l = idx[a];
  }
  
  if(k < l) cout << c[k] << endl;
  else{
    k -= l;
    k %= c;
    cout << s[l+k] << endl;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:30:7: error: no match for 'operator%=' (operand types are 'int' and 'std::vector<int>')
   30 |     k %= c;
      |     ~~^~~~
a.cc:31:13: error: 's' was not declared in this scope
   31 |     cout << s[l+k] << endl;
      |             ^
Language: C

#include<stdio.h>
#define ll long long
int main()
{
    11 N,K;11 i;
    scanf("%d %d",&N,&K);
    ll town[200005];
    for(i=1;i<=N;i++)
        scanf("%d",&town[i]);
    ll flag[200005];
    for(i=1;i<=N;i++)
        flag[i]=0;

    /**************************************************寻找第一个出现循环的镇****************************************************/
    flag[1]=1;ll now=1;
    for(i=1;i<=K;i++)
    {
        if(flag[town[now]]==1)    //到达第一个重复的镇，走了i步；
            break;
        flag[town[now]]=1;        
        now=town[now];
    }
    ll SpTown=town[now];          
    ll pre_sum=i;    

    i=0;now=1;
    while(now!=SpTown)
    {
        now=town[now];
        i++;
    }
   ll pre=i;ll y;
    y=pre_sum-pre;

    now=1;
    if(K<=pre)
         while(K--)
            now=town[now];
    else
    {
        K-=pre;
        K%=y;
        now=SpTown;
        while(K--)
            now=town[now];
    }


    printf("%d",now);
    return 0;
}


Compiler output:
main.c: In function 'main':
main.c:5:7: error: expected ';' before 'N'
    5 |     11 N,K;11 i;
      |       ^~
      |       ;
main.c:5:14: error: expected ';' before 'i'
    5 |     11 N,K;11 i;
      |              ^~
      |              ;
main.c:6:20: error: 'N' undeclared (first use in this function)
    6 |     scanf("%d %d",&N,&K);
      |                    ^
main.c:6:20: note: each undeclared identifier is reported only once for each function it appears in
main.c:6:23: error: 'K' undeclared (first use in this function)
    6 |     scanf("%d %d",&N,&K);
      |                       ^
main.c:8:9: error: 'i' undeclared (first use in this function)
    8 |     for(i=1;i<=N;i++)
      |         ^
Language: Java

import javax.print.attribute.HashAttributeSet;
import java.io.*;

import java.math.BigInteger;
import java.util.*;

import java.util.ArrayList;

import java.util.Scanner;


public class main {

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

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

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

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

        long nextLong() {
            return Long.parseLong(next());
        }

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

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }

    static final int mod = 1000000007;

    public static int gcd(int a, int b)
    {
        if (a == 0)
            return b;
        return gcd(b % a, a);
    }


    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        BigInteger k=sc.nextBigInteger();

        int a[]=new int[n];
        for(int j=0;j<n;j++)
            a[j]=sc.nextInt();
        BigInteger nn=new BigInteger(Integer.toString(n));


        BigInteger m=k.mod(nn);
        String mo=m.toString();

        int mo1=Integer.parseInt(mo);
        int ans=1;
        for(int j=0;j<n;j++)
        {
            ans=a[ans-1];

        }
        for(int j=0;j<mo1;j++)
        {
            ans=a[ans-1];

        }

        System.out.println(ans);




    }
}









Compiler output:
Main.java:12: error: class main is public, should be declared in a file named main.java
public class main {
       ^
1 error
Language: C++

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

int main() {
  long long N, K, a;
  cin >> N >> K;
  vector<long long> A(N);

  for (int i = 0; i < N; i++) {
    cin >> a;
    A.at(i) = a - 1;
  }

  vector<int> s;
  vector<int> ord(N + 1, -1);

  int c = 1, l = 0;
  int v = 1;
  while (ord.at(v) == -1) {
    ord.at(v) = s.size();
    s.push_back(v);
    v = A.at(v - 1);
  }

  c = s.size() - ord.at(v);
  l = ord.at(v);

  if (K < l) cout << s.at(K) << endl;
  else {
    K -= l;
    K %= c;
    cout << s.at(l + k) << endl;
  }

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:22: error: 'k' was not declared in this scope
   32 |     cout << s.at(l + k) << endl;
      |                      ^
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdbool.h>
#include <time.h>
#include <iostream>
#include <vector>
#include <map>

using namespace std;
int main(void)
{

  int a = 1;
  long long int n, d, dd, b, c, K, count = 0, com = 0;
  cin >> n;

  vector<long long int> vec(n + 1, 0);
  map<long long int, long long int> m;

  cin >> K;
  for (long long int i = 1; i <= n; i++)
  {
    cin >> m[i];
  }

  d = 1;
  for (long long int j = 1; j <= K; j++)
  {
    d = m[d];
    vec[d]++;
    if (a == 1)
    {
      if (vec[d] == 2)
      {
        dd = d;
        a = 2;
        if (j == K)
        {
          cout << d << endl;
          return 0;
        }
        continue;
      }
      if (j == K)
      {
        cout << d << endl;
        return 0;
      }
    }
    if (a == 2)
    {
      com++;
      if (j == K)
      {
        cout << d << endl;
        return 0;
      }
      if (dd == d)
      {
        c = ((K - j) % com);
        for (int o = 0; o < c; o++)
        {
          d = m[d];
        }

Compiler output:
a.cc: In function 'int main()':
a.cc:65:10: error: expected '}' at end of input
   65 |         }
      |          ^
a.cc:60:7: note: to match this '{'
   60 |       {
      |       ^
a.cc:65:10: error: expected '}' at end of input
   65 |         }
      |          ^
a.cc:52:5: note: to match this '{'
   52 |     {
      |     ^
a.cc:65:10: error: expected '}' at end of input
   65 |         }
      |          ^
a.cc:29:3: note: to match this '{'
   29 |   {
      |   ^
a.cc:65:10: error: expected '}' at end of input
   65 |         }
      |          ^
a.cc:12:1: note: to match this '{'
   12 | {
      | ^
Language: C++

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdbool.h>
#include <time.h>
#include <iostream>
#include <vector>
#include <map>
#define ll long long int
using namespace std;
int main()
{
  ll n, k;
  cin >> n >> k;
  //map<ll, ll> a;
  vector<ll> a(n + 1);
  vector<bool> seen(n + 1, false);
  seen[1] = true;
  for (ll i = 1; i < n + 1; i++)
  {
    cin >> a[i];
  }
  if (k < n)
  {
    int now = 1;
    for (ll i = 0; i < k; i++)
    {
      now = a[now];
    }
    cout << now << endl;
    return 0;
  }
  
  vector<bool> seen_2(n + 1, false);
  seen_2[now] = true;
  ll repeat = 1;
  for (ll i = 0;; i++)
  {
    now = a[now];
    if (seen_2[now])
      break;
    seen_2[now] = true;
    repeat++;
  }
  // cout << k << endl;
  // cout << repeat << endl;
  k %= repeat;
  // cout << k << endl;
  for (ll i = 0; i < k; i++)
  {
    now = a[now];
  }
  cout << now << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:10: error: 'now' was not declared in this scope; did you mean 'pow'?
   35 |   seen_2[now] = true;
      |          ^~~
      |          pow
Language: C++

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

int main()
{
        int N;
        long long K;
        cin >>N >> K;
        vector<int> A(N);
        for (int i = 0; i < N; ++i) cin >>A[i];
        vector<int> d(N, -1);
        vector<int> v;
        int p = 0;
        int cnt = 0;
        int l = 0;
        while (1) {
                v.push_back(p);
                if (d[p] != -1) {
                        l = d[p];
                        break;
                }
                d[p] = cnt;
                p = A[p]-1;
                cnt++;
        }
        int s = cnt - l;

        long long tmp = K - l;
        long long amari = tmp % s;
        if (l >= K) cout << v[K-1] << endl;
        eles cout << v[l+amari]+1 << endl;


}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:9: error: 'eles' was not declared in this scope
   31 |         eles cout << v[l+amari]+1 << endl;
      |         ^~~~
Language: C++

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <string>
#define arep(a,i,n) for(int i=(a);i<(n);i++)
#define rep(i,n) for(int i=0;i<(n);i++)
#define cinf(x,n) for(int i=0;i<(n);i++)cin>>x[i];
#define cinfzero(x,n) for(int i=0;i<(n);i++)x[i]=0;
#define coutf(x,n) for(int i=0;i<(n);i++)cout<<x[i]<<endl;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

using namespace std;


class Roop{
public:
	ll n;
	ll start;
};


ll judge(ll *b,ll key,ll imin,ll imax){
	if(imax < imin){
		return -1;
	}else{
		ll imid = imin + (imax-imin)/2;
		if(b[imid] > key){
			return judge(b,key,imin,imid-1);
		}else if(b[imid] < key){
			return judge(b,key,imid+1,imax);
		}else{
			return i;
		}
	}
}

/*int binary_search(int ary[], int key, int imin, int imax) {
    if (imax < imin) {
        return KEY_NOT_FOUND;
    } else {
        int imid = imin + (imax - imin) / 2;
        if (ary[imid] > key) {
            return binary_search(ary, key, imin, imid - 1);
        } else if (ary[imid] < key) {
            return binary_search(ary, key, imid + 1, imax);
        } else {
            return imid;
        }
    }
}*/

Roop search(const ll *a,ll start,ll tmp,ll *b){
	ll j = judge(b,start,);
	if(j==-1){
		b[tmp]= start;
		sort(b,b+tmp);
		return search(a,a[start-1],tmp+1,b);
	}
	else{
		Roop rp;
		rp.n=tmp-j;
		rp.start=j;
		return rp;
	}
}


int main(){
	ll n,k;
	cin >> n >> k;
	ll a[n],b[n];
	cinf(a,n);
	cinfzero(b,n);
	Roop rp = search(a,1,0,b);
	if(k < rp.start){
		cout << b[k] << endl;
	}else{
		k = rp.start + (k-rp.start)%rp.n;
		cout << b[k] << endl;
	}
}

Compiler output:
a.cc: In function 'll judge(ll*, ll, ll, ll)':
a.cc:36:32: error: 'i' was not declared in this scope
   36 |                         return i;
      |                                ^
a.cc: In function 'Roop search(const ll*, ll, ll, ll*)':
a.cc:57:30: error: expected primary-expression before ')' token
   57 |         ll j = judge(b,start,);
      |                              ^
Language: C++

#include <bits/stdc++.h>
typedef long long ll;
#define _GLIBCXX_DEBUG
#define int long long
using namespace std;
#define REP(i, n) for (ll i = 0; i < (ll)(n); i++)
#define REPR(i, n) for (ll i = (ll)(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 ALL(x) (x).begin(), (x).end()
#define SIZE(x) ((ll)(x).size())
#define MAX(x) *max_element(ALL(x))
#define MAXIN(x) max_element(ALL(x)) - v.begin();
#define MIN(x) *min_element(ALL(x))
#define INF 1000000000000
#define MOD 10000007
#define MAXR 100000
#define PI 3.14159265358979323846
using namespace std;

signed main() {
    int n, k;
    cin >> n >> k;

    vector<int> A(n);
    REP(i, n) {
        int a;
        cin >> a;
        A[i] = a - 1;
    }

    vector<int> homo(n, 0);

    bool go = true;
    int cnt = 0;
    int next = 0;
    // int first = A[0];
    bool first = true;
    int ha = 0;
    while (go) {
        //    cout << A[next] << endl;
        if (homo[next] == 1 && first) {
            ha = cnt;
            first = false;
        }
        if (homo[next] == 2) break;
        homo[next]++;
        next = A[next];
        cnt++;
    }

    //  cout << "OK = " << cnt << "HA=" << ha << endl;
    // int sa = cnt - ha;
    int issu = cnt - ha;
    int hajime = ha - issu;
    int nokori = () % issu;
    if (nokori < 0) {
        nokori = k;
        //       assert(false);
        // } else if (nokori == 0) {
        //     assert(false);
    } else {
        nokori += hajime;
    }
    next = 0;
    //  cout << "nokori="<<nokori <<endl ;
    if (k - hajime == 0) nokori--;

    for (int i = 0; i < nokori; i++) {
        //     cout << "next ="<<next <<endl ;
        next = A[next];
    }

    cout << next + 1 << endl;

    // int amari = (k - sa) % ha;
    // next = 0;
    // for (int i = 0; i < amari + sa; i++) {
    //     next = A[next];
    //     //       cout << next<<" " ;
    // }

    // cout << "ans" << A[next] + 1 << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:56:19: error: expected primary-expression before ')' token
   56 |     int nokori = () % issu;
      |                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;

const int D = 60;
const int MAX_N = 200005;
vvi to(D,vi(MAX_N));

int main(){
    int64_t k;
    int n,rev,loop; cin >> n >> k;
    vi a(n);
    for(int ix=0;ix<n;ix++){ cin >> to.at(0).at(ix); to.at(0).at(ix)--; }
    
    for(int ix=0;ix<D-1;i++) for(int ix2=0;ix2<n;ix2++) to.at(ix+1).at(ix2) = to.at(ix).at(to.at(ix).at(ix2));
    
    int v=0;
    for(int ix=D-1;ix>=0;ix--){
        int64_t l = (int64_t)1<<ix;
        if(k<=l){
            v = to.at(ix).at(v);
            k -=l;
        }
    }
    cout << v+1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:25: error: 'i' was not declared in this scope; did you mean 'ix'?
   16 |     for(int ix=0;ix<D-1;i++) for(int ix2=0;ix2<n;ix2++) to.at(ix+1).at(ix2) = to.at(ix).at(to.at(ix).at(ix2));
      |                         ^
      |                         ix
Language: C++

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

int main() {
  int N;
  int64_t K;
  cin >> N >> K;
  vector<bool> check(N, false);
  check.at(0) = true;
  vector<int> A(N);
  for (int i = 0; i < N; i++) {
    cin >> A.at(i);
  }
  int total = 1;
  bool finish = true;
  int a = 1;
  while(finish) {
    a = A.at(a - 1);
    if (check.at(a - 1)) {
      finish = false;
    }
    else {
      check.at(a - 1) = true;
      total += 1;
    }
  }
  int b = 1;
  int count = 0;
  bool same = true;
  while(same) {
    if (b == a) {
      same = false;
    }
    else {
      b = A.at(b - 1);
      count += 1;
    }
  }
  if (K >= count) {
    int roop = total - count;
    int64_t c = (K - count) % roop;
    int d = 1;
    for (int i = 0; i < count + roop + c; i++) {
      d = A.at(d - 1);
    }
    cout << d << endl;
  }
  else {
    int d = 1;
    for (int i = 0; i < K; i++) {
      d = A.at(d - 1);
    }
    cout << d << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:54:2: error: expected '}' at end of input
   54 | }
      |  ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(),x.end()
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
template<class T> inline bool chmax(T&a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T&a,T b){if(a>b){a=b;return 1;}return 0;}
using ll = long long;

ll n,k,cur,num;
vector<ll> a(100005),visit(100005,-1);

int main() {
  cin >> n >> k;
  rep(i,n) cin >> a[i], a[i]--;
  while(visit[cur]==-1){
    visit[cur]=num, cur=a[cur], num++;
  }
  if(num<=k){
    ll d=(k-visit[cur])%(num-visit[cur]);
    rep(i,d) cur=a[cur];
  }
  cout << cur+1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: reference to 'visit' is ambiguous
   15 |   while(visit[cur]==-1){
      |         ^~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:80,
                 from a.cc:1:
/usr/include/c++/14/variant:1855:5: note: candidates are: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1855 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
a.cc:10:22: note:                 'std::vector<long long int> visit'
   10 | vector<ll> a(100005),visit(100005,-1);
      |                      ^~~~~
a.cc:16:5: error: reference to 'visit' is ambiguous
   16 |     visit[cur]=num, cur=a[cur], num++;
      |     ^~~~~
/usr/include/c++/14/variant:1855:5: note: candidates are: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1855 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
a.cc:10:22: note:                 'std::vector<long long int> visit'
   10 | vector<ll> a(100005),visit(100005,-1);
      |                      ^~~~~
a.cc:19:13: error: reference to 'visit' is ambiguous
   19 |     ll d=(k-visit[cur])%(num-visit[cur]);
      |             ^~~~~
/usr/include/c++/14/variant:1855:5: note: candidates are: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1855 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
a.cc:10:22: note:                 'std::vector<long long int> visit'
   10 | vector<ll> a(100005),visit(100005,-1);
      |                      ^~~~~
a.cc:19:30: error: reference to 'visit' is ambiguous
   19 |     ll d=(k-visit[cur])%(num-visit[cur]);
      |                              ^~~~~
/usr/include/c++/14/variant:1855:5: note: candidates are: 'template<class _Visitor, class ... _Variants> constexpr std::__detail::__variant::__visit_result_t<_Visitor, _Variants ...> std::visit(_Visitor&&, _Variants&& ...)'
 1855 |     visit(_Visitor&& __visitor, _Variants&&... __variants)
      |     ^~~~~
a.cc:10:22: note:                 'std::vector<long long int> visit'
   10 | vector<ll> a(100005),visit(100005,-1);
      |                      ^~~~~
Language: C

#include<stdio.h>

int main(){

  int n;
  long long int k;
  scanf("%d%lld",&n,&k);

  int a[n+1];
  a[0] = 0;
  for(int i=1; i<=n; i++){
    scanf("%d",&a[i]);
  }

  int des=1;
  int count=0;
  int memory1,memory2;
  int flag1=0;
  int flag2=0;
  int roopcount[n+1];
  for(int i=0; i<n+1; i++){
    roopcount[i]=0;
  }

  for(long long int i=0; i<k; i++){
    count++;
    roopcount[a[des]]++;
    if((roopcount[a[des]]==2) && flag1==0){
      memory1 = count;
      flag1 = 1;
    }
    if((roopcount[a[des]]==3) && flag2==0){
      memory2 = count;
      flag2 = 1;
    }

    if(flag1==1 && flag2==1){
      if(memory2-memory1 == 0){
        printf("%d",k%(memory2-memory1));
        return 0;
      }else{
        printf("%d",a[memory1-1+k%(memory2-memory1)]);
        return 0;
    }

    des = a[des];
  }

  printf("%d",des);

}


Compiler output:
main.c: In function 'main':
main.c:51:1: error: expected declaration or statement at end of input
   51 | }
      | ^
Language: Java

import java.util.*;

public class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long k = sc.nextLong();
        int[] teleportation = new int[n];
        long stepsBeforeCycle = 0;
        int slow, fast;

        for(int i = 0; i < n; i++)
        	teleportation[i] = sc.nextInt() - 1;
        slow = fast = 0;

        while(true) {
        	slow = teleportation[slow];
        	fast = teleportation[teleportation[fast]];
        	if(slow == fast)
        		break;
        }
        int loopLen = 1;
        while(teleportation[fast] != slow) {
        	fast = teleportation[fast];
        	loopLen++;
        }

        fast = slow;
        slow = 0;
        while(slow != fast) {
        	slow = teleportation[slow];
        	fast = teleportation[fast];
        	stepsBeforeCycle++;
        }

        if(k <= stepsBeforeCycle) {
        	// slow = 0;
        	// while(k > 0) {
        	// 	slow = teleportation[slow];
        	// 	k--;
        	// }
        	// System.out.println(slow + 1);
        	// return;
        	System.out.println(solve(teleportation, k, 0));
        }
        else {
        	k -= stepsBeforeCycle;
        	k %= loopLen;
        	System.out.println(solve(teleportation, k, slow));
        	// while(k > 0) {
        	// 	slow = teleportation[slow];
        	// 	k--;
        	// }
        	// System.out.println(slow + 1);
        }

    }
    private static int solve(int[] teleportation, int k, int slow) {
    	while(k > 0) {
        		slow = teleportation[slow];
        		k--;
        	}
        return slow + 1;
    }
}

Compiler output:
Main.java:44: error: incompatible types: possible lossy conversion from long to int
        	System.out.println(solve(teleportation, k, 0));
        	                                        ^
Main.java:49: error: incompatible types: possible lossy conversion from long to int
        	System.out.println(solve(teleportation, k, slow));
        	                                        ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int n_copy=n;
		long k = sc.nextLong();
		//long h = k%n;
		long k_copy = k;
		//System.out.println(h);
		long[] arr = new long[n+1];
		for(int i=1;i<=n;i++){
			arr[i]=sc.nextLong();
		}
		// find the cycle in the graph
		long l = arr[1];
		long r = arr[arr[1]];
		while(l!=r){
			l=arr[l];
			r=arr[arr[r]];
		}
		l =1;
		while(l!=r){
			l=arr[l];
			r=arr[r];
		}
		// found the first node of the cycle

		// number of the element before the start of the cycle
		long cycstart = l;
		long ele=0;
		l=1;
		while(l!=cycstart){
			ele++;
			l=arr[l];
		}

		// find the lenght of the cycle
		cycstart=l;
		long len=1;
		l=cycstart;
		while(arr[l]!=cycstart){
			len++;
			l=arr[l];
		}
		l=1;
		while(ele!=0 && k!=0){
			l=arr[l];
			ele--;
			k--;
		}
		if(k==0){
			System.out.println(l);
		}
		k = k%len;

		while(k!=0){
			l=arr[l];
			k--;
		}
		System.out.println(l);
	}
}

Compiler output:
Main.java:17: error: incompatible types: possible lossy conversion from long to int
		long r = arr[arr[1]];
		                ^
Main.java:19: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
Main.java:20: error: incompatible types: possible lossy conversion from long to int
			r=arr[arr[r]];
			          ^
Main.java:20: error: incompatible types: possible lossy conversion from long to int
			r=arr[arr[r]];
			         ^
Main.java:24: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
Main.java:25: error: incompatible types: possible lossy conversion from long to int
			r=arr[r];
			      ^
Main.java:35: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
Main.java:42: error: incompatible types: possible lossy conversion from long to int
		while(arr[l]!=cycstart){
		          ^
Main.java:44: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
Main.java:48: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
Main.java:58: error: incompatible types: possible lossy conversion from long to int
			l=arr[l];
			      ^
11 errors
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main()
{
int n;
long long k;
cin>>n;
cin>>k;
int a[n];
for(int i1=0;i1<n;i1++){
    int d1;
    scanf("%d"h,&d1);
    a[i1]=d1-1;
}
vector<int> ans;
vector<int>::iterator it;
ans.push_back(0);
int prev=0,im;
for(int i1=0;i1<k;i1++){
        it=find(ans.begin(),ans.end(),a[prev]);
        if(it!=ans.end()){
                im=a[prev];
            break;
        }
    else{
        ans.push_back(a[prev]);
        prev=a[prev];
    }
}

int i2=0;
for(i2;i2<ans.size();i2++){
    if(ans[i2]==im){
        break;
    }
}

    if(k<i2){
    cout<<ans[k]+1;
    }
    else{
    k=(k-i2)%(ans.size()-i2);
    cout<<ans[i2+k]+1;

    }


return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:11: error: no matching function for call to 'operator""h<char, '%', 'd'>()'
   14 |     scanf("%d"h,&d1);
      |           ^~~~~
In file included from /usr/include/c++/14/chrono:41,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:172,
                 from a.cc:1:
/usr/include/c++/14/bits/chrono.h:1371:7: note: candidate: 'template<char ..._Digits> constexpr std::chrono::hours std::literals::chrono_literals::operator""h()'
 1371 |       operator""h()
      |       ^~~~~~~~
/usr/include/c++/14/bits/chrono.h:1371:7: note:   template argument deduction/substitution failed:
a.cc:14:11: error: type/value mismatch at argument 1 in template parameter list for 'template<char ..._Digits> constexpr std::chrono::hours std::literals::chrono_literals::operator""h()'
   14 |     scanf("%d"h,&d1);
      |           ^~~~~
a.cc:14:11: note:   expected a constant of type 'char', got 'char'
a.cc:14:11: note: some candidates omitted; use '-fdiagnostics-all-candidates' to display them
Language: C++

//author-micheal corleone
//the godfather
#include <bits/stdc++.h>
#include <set> 
#include<algorithm>
#define ll long long int

using namespace std;

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll n,k,i,j;
    cin>>n>>k;
    ll A[n+1];
     for(i=1;i<=n;i++) cin>>A[i];
     ll start=1,l;
    ll vis[N+1]={0};
     while(1)
     {
        if(vis[start]==1)
        {
          l=start;
          break;
        }
        vis[start]=1;
        start=A[start];
        k--;
        if(k==0)
        {
          cout<<start<<endl;
          return 0;
        }
     }
     ll cnt=0;
      vector<ll> v;
     for(i=l;;)
     {
        if(i==l && cnt!=0) break;
        v.push_back(i);
        i=A[i];
        cnt++;
     }
     ll d=v.size();
      cout<<v[k%d]<<endl;
}
     cout<<

Compiler output:
a.cc: In function 'int main()':
a.cc:19:12: error: 'N' was not declared in this scope
   19 |     ll vis[N+1]={0};
      |            ^
a.cc:22:12: error: 'vis' was not declared in this scope
   22 |         if(vis[start]==1)
      |            ^~~
a.cc:27:9: error: 'vis' was not declared in this scope
   27 |         vis[start]=1;
      |         ^~~
a.cc: At global scope:
a.cc:48:6: error: 'cout' does not name a type
   48 |      cout<<
      |      ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;

#define mem(dp,a)       memset(dp,a,sizeof dp)
#define ninja           ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define pb(x)           push_back(x)
#define all(c)          c.begin(), c.end()
#define int             long long
#define ff              first
#define ss              second
#define nl              '\n'

set<int> adj[200005];
bool vis[200005];
vector<int> path;

bool dfs(int s, int p){
	vis[s]=1;
	path.pb(s);
	for(auto i:adj[s]){
		if(!vis[i]){
			if(dfs(i,s))
			return true;
		}
		if(vis[i] and i!=p){
                path.pb(i);
			return true;
		}
	}
	return false;
}
int32_t main()
{
	ninja
	int n,k; cin>>n>>k;
	int x;
	for(int i=1;i<=n;i++){
		cin>>x;
		adj[i].insert(x);
	}
	mem(vis,false);
	bool cycle=dfs(1,-1);
	  //   for(auto i:path)
   //    cout<<i<<" ";
   // cout<<endl;

	int i=0,j=path.size()-1;
	while(i<j){
		if(path[i]==path[j]){
			break;
		}
		i++;
	}
	int temp =k;
	 k = k- i;
	 if(k<0){
	 	if(i+k<path.size())
	 	cout<<path[i+k]<<" ";return 0;
	 else{
	 	cout<<path[path.size()-1]; return 0;
	 }
	 }
	// cout<<j<<' '<<i<<nl;
	int final_dest = (k)%(j-i) + i;
	// if(i>0)
 //    path.erase(path.begin(),path.begin()+i-1);

    //cout<<final_dest<<endl;
	cout<< path[final_dest];
}



Compiler output:
a.cc: In function 'int32_t main()':
a.cc:60:10: error: expected '}' before 'else'
   60 |          else{
      |          ^~~~
a.cc:57:17: note: to match this '{'
   57 |          if(k<0){
      |                 ^
a.cc: At global scope:
a.cc:65:27: error: 'k' was not declared in this scope
   65 |         int final_dest = (k)%(j-i) + i;
      |                           ^
a.cc:65:31: error: 'j' was not declared in this scope; did you mean 'jn'?
   65 |         int final_dest = (k)%(j-i) + i;
      |                               ^
      |                               jn
a.cc:65:33: error: 'i' was not declared in this scope
   65 |         int final_dest = (k)%(j-i) + i;
      |                                 ^
a.cc:65:38: error: 'i' was not declared in this scope
   65 |         int final_dest = (k)%(j-i) + i;
      |                                      ^
a.cc:70:9: error: 'cout' does not name a type
   70 |         cout<< path[final_dest];
      |         ^~~~
a.cc:71:1: error: expected declaration before '}' token
   71 | }
      | ^
Language: C++

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

#define rep(i,n) for(int i = 0; i < n; i++)
#define REP(i,n) for(int i = 1; i < n; i++)
#define per(i,n) for(int i = n; i >= 0; i--)
#define sz(x) int(x.size())
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define YesorNo(a) printf(a ? "Yes\n" : "No\n")
#define endl '\n'
#define fi first
#define se second
using ll = long long;
using P = pair<int,int>;
using Pl = pair<ll,ll>;
using vi = vector<int>;
using vii = vector<vi>;
using vl = vector<ll>;
using vll = vector<vl>;
using vs = vector<string>;
using vb = vector<bool>;
using vc = vector<char>;
using vcc = vector<vc>;
const int dx[] = {0,1,0,-1,1,1,-1,-1};
const int dy[] = {1,0,-1,0,1,-1,-1,1};
const int inf = (1<<30)-1;
const ll infll = (1LL<<62)-1;
ll ceil(const ll &a, const ll &b){return ((a)+(b)-1)/b;}
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; }

struct Doubling {
  vector<vector<int>> to;
  int mx;
  Doubling(int n, int d, const vector<int> &a):to(d, vector<int>(n)) {
    mx = d;
    to[0] = a;
    for(int i = 1; i < mx; i++) for(int j = 0; j < n; j++) {
      to[i][j] = to[i-1][to[i-1][j]];
    }
  }
  operator()(int s, long long k) {
    int res = s;
    for(int i = mx-1; i >= 0; i--) {
      long long l = 1LL<<i;
      if(l <= k) {
        res = to[i][res];
        k -= l;
      }
    }
    return res;
  }
};

const int MX = 60;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  ll n, k;
  cin >> n >> k;
  vi a(n);
  rep(i,n) {
    cin >> a[i];
    a[i]--;
  }
  Doubling d(n,MX,a);
  int ans = d(0,k)+1;
  cout << ans << endl;
}

Compiler output:
a.cc:43:3: error: ISO C++ forbids declaration of 'operator()' with no type [-fpermissive]
   43 |   operator()(int s, long long k) {
      |   ^~~~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using PII = pair<ll, ll>;
#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
struct FastIO {FastIO() { cin.tie(0); ios::sync_with_stdio(0); }}fastiofastio;

template<ll LOG=60>
struct doubling {
    // nxt[i][j] = (j番目の要素に関数fを2^i回適用した要素は何番目の要素か)
    vector<vector<ll>> nxt; 
    doubling(vector<ll> nxt0) {
        REP(i, nxt0.size()) nxt[0][i] = nxt0[i];
        FOR(k, 1, LOG) REP(j, nxt0.size()) nxt[k][j] = nxt[k-1][nxt[k-1][j]];
    }
    // t=x番目の要素, t := f(t)をk回
    T query(ll x, ll k) {
        for(ll i=LOG-1; i>=0; --i) if(k&1LL<<i) x = nxt[i][x];
        return x;
    }
};

int main(void) {
    ll n, k;
    cin >> n >> k;
    vector<ll> a(n);
    for(auto &i: a) cin >> i, i--;

    doubling dbl(a);
    cout << dbl.query(0, k)+1 << endl;

    return 0;
}

Compiler output:
a.cc:19:5: error: 'T' does not name a type
   19 |     T query(ll x, ll k) {
      |     ^
a.cc: In function 'int main()':
a.cc:32:17: error: 'struct doubling<60>' has no member named 'query'
   32 |     cout << dbl.query(0, k)+1 << endl;
      |                 ^~~~~
Language: C++

#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<vector>
#include<stack>
#include<queue>
#include<set>
#include<map>
#include<iomanip>
#include<bitset>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> P;
typedef pair<ll,P> P1;
typedef pair<P,P> P2;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-7
#define INF 1000000000
#define fi first
#define sc second
#define rep(i,x) for(ll i=0;i<x;i++)
#define repn(i,x) for(ll i=1;i<=x;i++)
#define SORT(x) sort(x.begin(),x.end())
#define ERASE(x) x.erase(unique(x.begin(),x.end()),x.end())
#define POSL(x,v) (lower_bound(x.begin(),x.end(),v)-x.begin())
#define POSU(x,v) (upper_bound(x.begin(),x.end(),v)-x.begin())

const int MAX = 510000;
const int MOD = 1000000007;

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

  ll zan = K;
  ll now = 0;
  map<ll,ll> m;
  m[0] ++;
  vector<ll> tr;
  while(1){
    // 移動してzanが0になったら終了
    now = a[now];
    zan--;
    if(zan == 0){
      cout << a[now] << endl;
      return 0;
    }
    tr.pb(now);
    // mapが重複したらloopの出来上がり
    map[now]++;
    if(map[now] > 1) break;
  }

  // cirを求める
  ll si = tr.size();
  ll start = 0;
  rep(i,si - 1){
    if(tr[i] == tr.back()){
      start = i;
    }
  }
  // si - 1 と startにある状態
  ll cir = (si - 1) - start;

  // marが0ならstartに戻っている状態
  ll mar = (K - start) % cir;
  cout << tr[start + cir] + 1 << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:55:13: error: expected initializer before '++' token
   55 |     map[now]++;
      |             ^~
a.cc:55:13: error: expected ';' before '++' token
a.cc:56:11: error: expected unqualified-id before '[' token
   56 |     if(map[now] > 1) break;
      |           ^
Language: C++

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

long long cycletown=1;
long long cyclelen=0;
long long totallen=0;
long long n;
long long k;

void dfs(long long t, vector<long long> &arr, vector<bool> &vis)
{
  if (vis[t])
  {
    cycletown=t;
    return;
  }
  
  vis[t]=true;
  
  dfs (arr[t],arr,vis);
  
  totallen++;
  
  if (vis[cycletown])
    cyclelen++;
  
  vis[t]=false;
}

long long town (vector<long long> &arr, vector<bool> &vis)
{
  if (k<=n)
  {
  	long long anstown = 1;
    for (long long i=0;i<k;i++)
    anstown = arr[anstown];
    
    return anstown;
  }
  
  dfs (1,arr,vis);
  
  k-= (totallen-cyclelen);

  k%=cyclelen;
  
  long long anstown = cycletown;
  
  for (long long i=0;i<k;i++)
    anstown = arr[anstown];
  
  return anstown;
}

int main()
{
  cin>>n;
  cin>>k;
  
  vector<long long> arr (n+1,0);
  for (long long i=1;i<=n;i++)
    cin>>arr[i];
  
  vector<bool> vis (n+1,false);
  
  cout<<town(arr,vis,k);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:66:13: error: too many arguments to function 'long long int town(std::vector<long long int>&, std::vector<bool>&)'
   66 |   cout<<town(arr,vis,k);
      |         ~~~~^~~~~~~~~~~
a.cc:30:11: note: declared here
   30 | long long town (vector<long long> &arr, vector<bool> &vis)
      |           ^~~~
Language: C++

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

long long cycletown=1;
long long cyclelen=0;
long long totallen=0;

void dfs(long long t, vector<long long> &arr, vector<bool> &vis)
{
  if (vis[t])
  {
    cycletown=t;
    return;
  }
  
  vis[t]=true;
  
  dfs (arr[t],arr,vis);
  
  totallen++;
  
  if (vis[cycletown])
    cyclelen++;
  
  vis[t]=false;
}

long long town (vector<long long> &arr, vector<bool> &vis, long long k)
{
  if (k<=n)
  {
  	long long anstown = 1;
    for (long long i=0;i<k;i++)
    anstown = arr[anstown];
    
    return anstown;
  }
  
  dfs (1,arr,vis);
  
  k-= (totallen-cyclelen);

  k%=cyclelen;
  
  long long anstown = cycletown;
  
  for (long long i=0;i<k;i++)
    anstown = arr[anstown];
  
  return anstown;
}

int main()
{
  long long n;
  cin>>n;
  
  long long k;
  cin>>k;
  
  vector<long long> arr (n+1,0);
  for (long long i=1;i<=n;i++)
    cin>>arr[i];
  
  vector<bool> vis (n+1,false);
  
  cout<<town(arr,vis,k);
}


Compiler output:
a.cc: In function 'long long int town(std::vector<long long int>&, std::vector<bool>&, long long int)':
a.cc:30:10: error: 'n' was not declared in this scope
   30 |   if (k<=n)
      |          ^
Language: C

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

long long n,k,now=1,cnt,a[210000],pre[210000];

int main(){
  cin>>n>>k;
  for(int i=1;i<=n;i++)cin>>a[i];
  while(k--){
    now=a[now];
    if(pre[now])k%=cnt-pre[now];
    pre[now]=cnt++;
  }
  cout<<now<<endl;
}


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<bits/stdc++.h>
using namespace std;
int main(){
    long long k;
    int now=1,cum,n,a[200005],b[200005];
    scanf("%d%lld",&n,&k);
    for(int i=1; i<=n; i++) scanf("%d",&a[i]);
    while(k--){
        now=a[now];
        if(b[now])k%=cum-b[now];
        b[now]=cum++;
    }
    printf("%d",now);
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
    long long k,now=1,cum=0,n,a[200005],b[200005];
    scanf("%lld%lld",&n,&k);
    for(int i=1; i<=n; i++) scanf("%lld",&a[i]);
    while(k--){
        now=a[now];
        if(b[now])k%=cum-b[now];
        b[now]=cum++;
    }
    printf("%lld",now);
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
    long long k,now=1,cum=0,n,a[200005],b[200005];
    scanf("%lld%lld",&n,&k);
    for(int i=1; i<=n; i++) scanf("%lld",&a[i]);
    while(k--){
        now=a[now];
        if(b[now])k%=cum-1;
        b[now]=cum++;
    }
    printf("%lld",now);
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
    long long k,now=1,cum=0,n,a[20005],b[20005];
    scanf("%lld%lld",&n,&k);
    for(int i=1; i<=n; i++) scanf("%d",&a[i]);
    while(k--){
        now=a[now];
        if(b[now])k%=cum-1;
        b[now]=cum++;
    }
    printf("%d",now);
    return 0;
}


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

#include<bits/stdc++.h>
using namespace std;
int main(){
    long long k,now=1,cum=0,n,a[20005]= {0},b[20005]= {0};
    scanf("%lld%lld",&n,&k);
    for(int i=1; i<=n; i++) scanf("%d",&a[i]);
    while(k--){
        now=a[now];
        if(b[now])k%=cum-1;
        b[now]=cum++;
    }
    printf("%d",now);
    return 0;
}


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

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<unordered_map>
#include<cmath>
#include <bits/stdc++.h>
using namespace std;

signed main(){
	
	long long int N,K;
	cin>>N>>K;
	vector<long long int>A(N);
	for(long long int i = 0; i < N; i++){
		
		cin>>A[i];
		A[i]--;
	}
	long long int ls = 0;
	long long int le = 0;
	long long int f = 0;
	map<long long int,long long int> C;
	map<long long int,long long int> S;
	int cnt=0;
	C[0]++;
	vector<long long int>sec;
	for(long long int i = 0;;){
		S[i]=cnt;
		C[A[i]]++;
		//cout<< A[i]<<" "<<C[A[i]]<<endl;
		sec.push_back(i);
		//f++;
		if(C[A[i]]>=2){
			ls = S[A[i]];
			le = S[i];
			break;
		}
		i = A[i];
		cnt++;
	}
	long long int d = 0;
	long long int ff = 0;
	vector<long long int>loop;
	for(long long int i = ls; i <= le;i++){
		 loop.push_back(sec[i]);
		
		
	}
	d = le-ls+1;
	long long int q = K-ls;
	if(d!=0)long long int p = q%d;
	//cout<<d<<" "<<p<<endl;
	
	
	if(d != 0)cout<<loop[p]+1<<endl;
	if(d == 0)cout<<sec[ls]+1<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:56:30: error: 'p' was not declared in this scope
   56 |         if(d != 0)cout<<loop[p]+1<<endl;
      |                              ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
	int n; long long k;
  	cin >> n >> k;
  	int[] a = new int[n];
  	for (int i = 0; i < n; i++) {
    	cin >> a[i];
 		--a[i];
    }
  	vector<int> cycle;
  	cycle.push_back(0);
  	int pos = a[0];
  	while (pos != 0) {
    	cycle.push_back(pos);
      	pos = a[pos];
    }
  	cout << cycle[(k - 1) % cycle.size()] + 1 << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:12: error: structured binding declaration cannot have type 'int'
    6 |         int[] a = new int[n];
      |            ^~
a.cc:6:12: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:6:12: error: empty structured binding declaration
a.cc:6:15: error: expected initializer before 'a'
    6 |         int[] a = new int[n];
      |               ^
a.cc:8:16: error: 'a' was not declared in this scope
    8 |         cin >> a[i];
      |                ^
a.cc:13:19: error: 'a' was not declared in this scope
   13 |         int pos = a[0];
      |                   ^
Language: C++

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii =  pair<int, int>;
using pll =  pair<long long, long long>;
constexpr char ln =  '\n';
constexpr long long MOD = 1000000007LL;
constexpr long long INF = 1000000009LL;
#define all(x) (x).begin(),(x).end()
#define rep(i,n) for(int i=0;i<(n);i++)
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }



int main() {
    int n; ll k; cin >> n >> k;
    vector<int> A(n+1);
    rep(i, n) { int num; cin >> num; A[i] = num-1;

    vector<int> first_visited(200200, -1); //その町に最初に訪れた時にテレポーターを使った回数
    first_visited[1] = 0;
    vector<int> pass; pass.push_back(1); //同じ町に二度訪れるまでの経路

    //ループが始まるまでの経路を作成
    //rp:　pass内の閉路の長さ 　nrp: 閉路でない経路の長さ  cur: 現在地
    int rp = 0, nrp = 0, cur = 1; 
    for(int cnt=1; cnt<=k; cnt++){
        int to = A[cur]; 
        if(first_visited[to] == -1){ //次の街をまだ訪れていない場合は経路を追加してそこに移動する
            pass.push_back(to);
            first_visited[to] = cnt;
            cur = to;
        }else{ //同じ町を二度訪れる場合はループ終了 
            rp = cnt - first_visited[to];
            nrp = pass.size() - rp;
            break;
        }
    }
    if(rp == 0) rp = pass.size(); //閉路を見つける前にループが終わった場合の処理
    
    int ans = nrp + (k - nrp) % rp;
    cout << pass[ans] << ln;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:45:2: error: expected '}' at end of input
   45 | }
      |  ^
a.cc:17:12: note: to match this '{'
   17 | int main() {
      |            ^