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

#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define SORT(v, n) sort(v, v+n);
#define VSORT(v) sort(v.begin(), v.end())
#define VRSORT(v) sort(v.rbegin(), v.rend())//vectorの降順ソート
#define ll long long
#define pb(a) push_back(a)
#define INF 1000000000
#define MOD 1000000007
using namespace std;
typedef pair<int, int> P;
typedef pair<ll, ll> LP;
typedef pair<int, P> PP;
typedef pair<ll, LP> LPP;

typedef vector<unsigned int>vec;
typedef vector<vec> mat;
//typedef tuple<ll, ll, ll> T;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }


int dy[]={0, 0, 1, -1, 0};
int dx[]={1, -1, 0, 0, 0};

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    string res;
    cin>>n;
    cout<<0<<endl;
    cin>>res;
    if(res=="Vacant") return 0;
    cout<<n-1<<endl;
    cin>>res;
    if(res=="Vacant") return 0;
    int l=0;r=n;
    while(r-l>1){
        int m=(l+r)/2;
        cout<<m<<endl;
        cin>>res;
        if(res=="Vacant") return 0;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:13: error: 'r' was not declared in this scope
   39 |     int l=0;r=n;
      |             ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

const string MALE = "Male";
const string FEMALE = "Female";
const string VACANT = "Vacant";
const int MAXN = 1000005

int N, seat[MAXN]; //0:unknown 1:male 2:female

int main()
{
    map<string, int> f;
    f[MALE] = 1;
    f[FEMALE] = 2;

    cin >> N;
    for(int i=0 ; i<N ; ++i)
        seat[i] = 0;

    int l = rand()%N; r = l+N/2;
    cout << l << '\n';
    cin >> res;
    if(res==VACANT)
        return 0;

    seat[l] = f[res];

    cout << r%N << '\n';
    cin >> res;
    if(res==VACANT)
        return 0;

    seat[r%N] = f[res];

    int next_l = l, next_r = r;
    if((r-l)%2==0) // odd seats between l and r
    {
        if(seat[l]==seat[r%N])
        {
            next_l = r%N;
            for(int i=1; i<N ; ++i)
            {
                if( (next_l+i)%N == l)
                {
                    next_r = next_l+i;
                    break;
                }
            }
        }
    }
    l = next_l;
    r = next_r;

    while(l<r)
    {
        int m = (l+r)/2;
        cout << m%N << '\n';
        cin >> res;
        if(res==VACANT)
            return 0;
        seat[m%N] = f[res];
        if( (m-l)%2==0 ) // odd seats between l and r
        {
            if(seat[l%N]==seat[m%N])
            {
                l = m;
            }
        }
        else
        {
            if(seat[l%N]!=seat[m%N])
            {
                r = m;
            }
        }
    }

    return 0;
}


Compiler output:
a.cc:10:1: error: expected ',' or ';' before 'int'
   10 | int N, seat[MAXN]; //0:unknown 1:male 2:female
      | ^~~
a.cc: In function 'int main()':
a.cc:18:12: error: 'N' was not declared in this scope
   18 |     cin >> N;
      |            ^
a.cc:20:9: error: 'seat' was not declared in this scope
   20 |         seat[i] = 0;
      |         ^~~~
a.cc:22:23: error: 'r' was not declared in this scope
   22 |     int l = rand()%N; r = l+N/2;
      |                       ^
a.cc:24:12: error: 'res' was not declared in this scope
   24 |     cin >> res;
      |            ^~~
a.cc:28:5: error: 'seat' was not declared in this scope
   28 |     seat[l] = f[res];
      |     ^~~~
Language: Java

import java.util.*;

public class Main2 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		String tar[] = {"Female", "Male", "Vacant"};
		int l = 0, r = n - 1;
		int m = (r + l) / 2;
		System.out.println(0);
		String s = sc.next();
		if(s.equals(tar[1])) {
			String tmp = tar[0];
			tar[0] = tar[1];
			tar[1] = tmp;
		}
		if (!s.equals(tar[2])) {
			while (l + 1 < r) {
				m = (r + l) / 2;
				System.out.println(m);
				s = sc.next();
				if(s.equals(tar[2]))break;
				else if(s.equals(tar[m % 2]))r = m;
				else l = m;
			}
		}
		sc.close();
	}

}


Compiler output:
Main.java:3: error: class Main2 is public, should be declared in a file named Main2.java
public class Main2 {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std ;
#define rep(i, a, b) for (int (i) = (a); (i) <= (b); (i)++)
#define Rep(i, a, b) for (int (i) = (a) - 1; (i) < (b); (i)++)
#define REP(i, a, b) for (int (i) = (a); (i) >= (b); (i)--)
#define clr(a) memset(a, 0, sizeof(a))
#define Sort(a, len, cmp) sort(a + 1, a + len + 1, cmp)
#define ass(a, sum) memset(a, sum, sizeof(a))
#define ls ((rt) << 1)
#define rs ((rt) << 1 | 1)
#define lowbit(x) (x & -x)
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define endl '\n'
#define ENDL cout << endl
#define SZ(x) ((int)x.size())
typedef long long ll ;
typedef unsigned long long ull ;
typedef vector <int> vi ;
typedef pair <int, int> pii ;
typedef pair <ll, ll> pll ;
typedef map <int, int> mii ;
typedef map <string, int> msi ;
typedef map <ll, ll> mll ;
const int N = 100010 ;
const double eps = 1e-8 ;
const int iinf = INT_MAX ;
const ll linf = 2e18 ;
const double dinf = 1e30 ;
const int MOD = 1000000007 ;
inline int read(){
    int X = 0, w = 0 ;
    char ch = 0 ;
    while (!isdigit(ch)) { w |= ch == '-' ; ch = getchar() ; }
    while (isdigit(ch)) X = (X << 3) + (X << 1) + (ch ^ 48), ch = getchar() ;
    return w ? - X : X ;
}

void write(int x){
     if (x < 0) putchar('-'), x = - x ;
     if (x > 9) write(x / 10) ;
     putchar(x % 10 + '0') ;
}

void print(int x) {
    cout << x << endl ;
    exit(0) ;
}
void PRINT(string x) {
    cout << x << endl ;
    exit(0) ;
}
void douout(double x){
     printf("%lf\n", x + 0.0000000001) ;
}
int n ;
int a[N] ;
string s ;
void get(int x) {
    printf("%d\n", x) ; fflush(stdout) ;
    cin >> s ;
    if (s[0] == 'M') a[x] = 1 ;
    if (s[0] == 'F') a[x] = 2 ;
    if (s[0] == 'V') a[x] = -1, exit(0) ;
}
signed main(){
    cin >> n ;
    int l = 0, r = n - 1 ;
    get(l) ; get(r) ;
    while (l + 1 < r) {
        int mid = (l + r) >> 1 ;
        get(mid) ;
        if ((r - mid - 1) & 1) {
            if (a[mid] == a[r]) r = mid ;
            else l = mid ;
        }
        else {
            if (a[mid] != a[r]) r = mid ;
            else l = mid ;
        }
    }
}
return 0;


Compiler output:
a.cc:85:1: error: expected unqualified-id before 'return'
   85 | return 0;
      | ^~~~~~
Language: C++

#include <iostream>
#include <string>
#include <algorithm> 
#include<map>
using namespace std;
typedef long long lint;
typedef pair<int ,int> pi;
const int MAXN=20005;
map<int,int> mp;
int query(int x){
	if(mp.find(x)!=mp.end()) return mp[x];
	printf("%d\\n",x);
	fflush(stdout);
	string s;
	cin>>s;
	if(s=="Vacant") et(0);
	return mp[x]=(s=="Male");
}
int main(){
	int n;
	cin>>n;
	int s=0,e=n-1;
	while(e-s>=2){
		int m=(s+e)/2;
		if((query(m)^(m%2))!=(query(s)^(s%2))){
			e=m;
		}
		else s=m;
	}
	for(int i=s;i<=e;i++) query(i);
}

Compiler output:
a.cc: In function 'int query(int)':
a.cc:16:25: error: 'et' was not declared in this scope
   16 |         if(s=="Vacant") et(0);
      |                         ^~
Language: C++

#include<stdio.h>
#include<map>
using namespace std;
typedef long long lint;
typedef pair<int ,int> pi;
const int MAXN=20005;
map<int,int> mp;
int query(int x){
	if(mp.find(x)!=mp.end()) return mp[x];
	printf("%d\\n",x);
	fflush(stdout);
	string s;
	cin>>s;
	if(s=="Vacant") eixt(0);
	return mp[x]=(s=="Male");
}
int main(){
	int n;
	cin>>n;
	int s=0,e=n-1;
	while(e-s>=2){
		int m=(s+e)/2;
		if((query(m)^(m%2))!=(query(s)^(s%2))){
			e=m;
		}
		else s=m;
	}
	for(int i=s;i<=e;i++) query(i);
}

Compiler output:
a.cc: In function 'int query(int)':
a.cc:12:9: error: 'string' was not declared in this scope
   12 |         string s;
      |         ^~~~~~
a.cc:3:1: note: 'std::string' is defined in header '<string>'; this is probably fixable by adding '#include <string>'
    2 | #include<map>
  +++ |+#include <string>
    3 | using namespace std;
a.cc:13:9: error: 'cin' was not declared in this scope
   13 |         cin>>s;
      |         ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<map>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:13:14: error: 's' was not declared in this scope
   13 |         cin>>s;
      |              ^
a.cc:14:25: error: 'eixt' was not declared in this scope
   14 |         if(s=="Vacant") eixt(0);
      |                         ^~~~
a.cc: In function 'int main()':
a.cc:19:9: error: 'cin' was not declared in this scope
   19 |         cin>>n;
      |         ^~~
a.cc:19:9: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <iostream>
#include <vector>
#include <utility>
#define rep(i,n) for(int i = 0; i < n; i++)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
int main(){
    int n;
    string s,t;
    cin >> n;
    cout << 0 << endl;
    cin >> s;
    if(s == "Vacant"){
        return 0;
    }
    cout << n-1 << endl;
    cin >> t;
    if(t == "Vacant"){
        return 0;
    }
    int l = 0,r = n-1;
    rep(hoge,18){
        int mid = (l+r)/2;
        cout << mid << endl;
        string m;
        cin >> m;
        if(m=="Vacant"){
            return 0;
        }
        if((m == s and (mid-l)%2) or (m!=s and (mid-l)%2==0){
            r = mid;
            t = m;
        }else{
            l = mid;
            s = m;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:61: error: expected ')' before '{' token
   31 |         if((m == s and (mid-l)%2) or (m!=s and (mid-l)%2==0){
      |           ~                                                 ^
      |                                                             )
a.cc:38:5: error: expected primary-expression before '}' token
   38 |     }
      |     ^
Language: C++

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

using namespace std;

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define SORT(c) sort((c).bigin(), (c).end())

typedef long long ll;

int main()
{
    int n, se[112345];

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

    cin >> n;

    cout << 0 << endl;

    string s;
    cin >> s;

    if (s == "Vacant")
        return 0;

    se[0] = s == "Female";
    se[n - 1] = s == "Male";
    se[1] = s == "Male";

    int l = 0, r = n - 1;

    int cnt = 1;
    while (cnt < 20)
    {
        int mid = (r + l) / 2;

        cout << mid << endl; // " " << l << " " << r << " " << se[l] << endl;

        string s;
        cin >> s;

        if (s == "Vacant")
            break;

        int sn = s == "Female";

        se[mid] = sn;
        if (se[mid + 1] == -1)
            se[mid + 1] = 1 - sn;
        if (se[mid - 1] == -1)
            se[mid - 1] = 1 - sn;

        if ((mid - l) % 2 == 0)
        {
            if (sn == se[l])
            {
                l = mid + 1;
            }
            else
            {
                r = mid - 1;
            }
        }
        else
        {
            if (sn == se[l])
            {
                r = mid - 1;
            }
            else
            {
                l = mid + 1;
            }
        }

        cnt++;
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:5: error: 'memset' was not declared in this scope
   20 |     memset(se, -1, sizeof(se));
      |     ^~~~~~
a.cc:7:1: note: 'memset' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    6 | #include <cmath>
  +++ |+#include <cstring>
    7 |
Language: C++

import sys
n = int(input())
print(0)
s = input()
if s == "Vacant":
    sys.exit()
lb, ub = 0, n
ls, us = s, s
while True:
    mid = (lb + ub) // 2
    print(mid)
    mis = input()
    if mis == "Vacant":
        sys.exit()
    if (ls == mis) ^ ((mid - lb) & 1):
        lb = mid
        ls = mis
    else:
        ub = mid
        us = mis


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import sys
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <iostream>

using namespace std;

void check(int hi, int lo, bool& found){
    if(found) return;
    int mid = (lo + hi)/2;
    string s;
    cout<<mid;
    cin>>s;
    if(s == "Vacant") {
        found = true;
        return;
    }
    else{
        check(lo, m);
        check(m, hi);
    }
}

int main()
{
   int n;
   cin>>n;
   string s = "";
   int lo = 0;
   int hi = n;
   string s;
   cout<<lo;
   cin>>s;
   if(s == "Vacant") return 0;
   check(0, n, false);
   return 0;
}

Compiler output:
a.cc: In function 'void check(int, int, bool&)':
a.cc:16:19: error: 'm' was not declared in this scope
   16 |         check(lo, m);
      |                   ^
a.cc: In function 'int main()':
a.cc:28:11: error: redeclaration of 'std::string s'
   28 |    string s;
      |           ^
a.cc:25:11: note: 'std::string s' previously declared here
   25 |    string s = "";
      |           ^
a.cc:32:16: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
   32 |    check(0, n, false);
      |                ^~~~~
a.cc:5:34: note:   initializing argument 3 of 'void check(int, int, bool&)'
    5 | void check(int hi, int lo, bool& found){
      |                            ~~~~~~^~~~~
Language: C++

#include<stdio.h>
#include<string.h>
int c[100010];
char s[10];
#ifdef local
#include"head.h"
#else
	int getn(){
		int n;
		scanf("%d",&n);
		return n;
	}
	int get(int x){
		if(~c[x])return c[x];
		printf("%d\n",x);
		fflush(stdout);
		scanf("%s",s);
		if(s[0]=='V')throw 0;
		return c[x]=s[0]=='M';
	}
#endif
void work(){
	int n,l,r,mid;
	memset(c,-1,sizeof(c));
	n=getn();
	try{
		l=0;
		r=n-1;
		while(r-l>2){
			mid=(l+r)>>1;
			if((mid-l+1)&1){
				if(get(l)^get(mid))
					r=mid;
				else
					l=mid;
			}else{
				if(get(mid+1)^get(r))
					l=mid+1;
				else
					r=mid+1;
			}
		}
		while(l<=r)get(l++);
	}catch(int e){}
}

Compiler output:
/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>
using namespace std;
typedef long long LL;
const LL INF = 1e18;
const int MAXN = 20;
char sl[MAXN],sr[MAXN],sm[MAXN];

int main(){
	int n;
	scanf("%d",&n);
	int L=0,R=n-1,mid;
	printf("%d\n",L);
	fflush(stdout);
	scanf("%s",sl);
	if(sl[0]=='V') return 0;
	while(L+1<R){
		mid=(L+R)/2;
		printf("%d\n",mid);
		fflush(stdout);
		scanf("%s",sm);
		if(sm[0]=='V') return 0;
		if(sl[0]==sm[0]){
			if((mid-L-1)&1) L=mid,sl[0]=sm[0];
			else R=mid,sr[0]=sm[0];
		}else{
			if((mid-L-1)&1) R=mid,sr[0]=sm[0]
			else L=mid,sl[0]=sm[0];
		}
	}
	printf("%d\n",n-1);
	fflush(stdout);
	scanf("%s",sr);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:58: error: expected ';' before 'else'
   26 |                         if((mid-L-1)&1) R=mid,sr[0]=sm[0]
      |                                                          ^
      |                                                          ;
   27 |                         else L=mid,sl[0]=sm[0];
      |                         ~~~~
Language: C++

/**
*/
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
int N,M;
bool flag;
char state1[10],state2[10];

int main()
{
//#ifdef _WY
//freopen("0905.in","r",stdin);
//#endif // _WY

	//scanf("%d",&N);
	cin>>N;
	flag=false;
	int lo=0,hi=N-1,mid;
	while(lo<=hi&&flag==false){
		mid=(lo+hi)/2;
		cout<<mid<<endl;//printf("%d\n",mid);
		cin>>state1;//scanf("%s",state1);
		if(state1[0]=='V'){
			flag=true;break;
		}

		if(lo!=mid){
			cout<<lo<<endl;//printf("%d\n",lo);
			cin>>state2;//scanf("%s",state2);
			if(state2[0]=='V'){
				flag=true;break;
			}
			else{
				int len=mid-lo+1;
				if(((len&1)&&state2[0]!=state1[0])||((len%2==0))&&state2[0]==state1[0])){
					hi=mid-1;lo=lo+1;continue;
				}
			}
		}

		if(hi!=mid){
			cout<<hi<<endl;//printf("%d\n",hi);
			cin>>state2;//scanf("%s",state2);
			if(state2[0]=='V'){
				flag=true;break;
			}
			else{
				int len=hi-mid+1;
				if(((len&1)&&state2[0]!=state1[0])||((len%2==0)&&state2[0]==state1[0])){
					lo=mid+1;hi=hi-1;continue;
				}
			}
		}
	}
	cout << flush;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:36:104: error: expected primary-expression before ')' token
   36 |                                 if(((len&1)&&state2[0]!=state1[0])||((len%2==0))&&state2[0]==state1[0])){
      |                                                                                                        ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
const LL INF = 1e18;
const int MAXN = 20;
char sl[MAXN],sr[MAXN],sm[MAXN];

int main(){
	int n;
	scanf("%d",&n);
	int L=0,R=n-1,mid;
	printf("%d\n",L);
	fflush(stdout);
	scanf("%s",sl);
	if(sl[0]=='V') break;
	printf("%d\n",R);
	fflush(stdout);
	scanf("%s",sr);
	if(sr[0]=='V') break;
	while(L<=R){
		mid=(L+R)/2;
		printf("%d\n",mid);
		fflush(stdout);
		scanf("%s",sm);
		if(sm[0]=='V') break;
		if(sl[0]==sm[0]){
			if((mid-L-1)&1) L=mid,sl[0]=sm[0];
			else R=mid,sr[0]=sm[0];
		}else{
			if((R-mid-1)&1) R=mid,sr[0]=sm[0];
			else L=mid,sl[0]=sm[0];
		}
	}
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:24: error: break statement not within loop or switch
   15 |         if(sl[0]=='V') break;
      |                        ^~~~~
a.cc:19:24: error: break statement not within loop or switch
   19 |         if(sr[0]=='V') break;
      |                        ^~~~~
Language: C++

#include "iostream"
#include "algorithm"
#include "string"
#include "vector"
#include "cmath"
#include "bitset"
#include "queue"
#include "functional"
#include "map"
#include "unordered_map"
#include "set"
#include "stack"
 
#define lp(n) for (int i = 0; i < n; i++)
#define LP(n,i) for (int i = 0; i < n; i++)
#define mod 1000000007
#define sp ' '
#define intmax 2147483647
#define llmax 9223372036854775807
#define nyan "(=^･ω･^=)"
typedef long long ll;
using namespace std;

int n,l,r;
string sl,sr,mem;

int main(){
	cin>>n;
	l=0;r=n-1;
	cout<<l<<endl;
	cin>>sl;
	if(sl=="Vacant")
		return 0;
	cout<<r<<endl;
	cin>>sr;
	if(sr=="Vacant")
		return 0;
	while(true){
		cout<<(l+r)/2<<endl;
		cin>>mem;
		if(mem=="Vacant")
			return 0;
		if((((l-r)/2-l)%2==0&&mem!=sl)||((l-r)/2-l)%2==1&&mem==sl)){
			sr=mem;
			r=(l+r)/2;
		}
		else {
			sl=mem;
			l=(l+r)/2;
		}
	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:43:75: error: expected primary-expression before ')' token
   43 |                 if((((l-r)/2-l)%2==0&&mem!=sl)||((l-r)/2-l)%2==1&&mem==sl)){
      |                                                                           ^
Language: C++

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

string query(int x) {
	cout << x << '\n';
	cout.flush();
	string res; cin >> res;
	if (res == "Vacant") exit(0);
	return res;
}

int main() {
	ios_base::sync_with_stdio(false);
	int n; cin >> n;
	int l = 0, r = n - 1;
	string x = query(0), y = query(n - 1);
	while (1) {
		int mid = l + r >> 1;
		string z = query(mid);
		if ((x == z) != (l % 2 == k % 2)) {
			r = mid;
			y = z;
		}
		else {
			l = mid;
			x = z;
		}
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:43: error: 'k' was not declared in this scope
   20 |                 if ((x == z) != (l % 2 == k % 2)) {
      |                                           ^
Language: C++

#include <bits/stdc++.h>

using namespace std;

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template<typename Q_temp>
using smaller_queue = priority_queue <Q_temp, vector<Q_temp>, greater<Q_temp> >;

const int INF = 1000000000;
const ll LINF = (ll) 4000000000000000000;
const ll MOD = (ll) 1000000007;
const double PI = acos(-1.0);
const int limit = 100010;

#define REP(i,m,n) for(ll i = m; i < (ll)(n); ++i)
#define rep(i,n) REP(i, 0, n)
#define MP make_pair
#define YES(n) cout << ((n) ? "YES" : "NO") << endl
#define Yes(n) cout << ((n) ? "Yes" : "No") << endl
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << endl
#define NP(v) next_permutation(v.begin(),v.end())
//------------------------------------------------------

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;
    cout << 0 << endl;
    string s, s0;
    cin >> s;
    if (s == "Vacant") break;
    s0 = s;
    cout << n - 1 << endl;
    cin >> s;
    if (s == "Vacant") break;
    int lo = 0, hi = n - 1;
    int mi = (lo + hi) / 2;

    rep(i, 18) {
        if (s == "Vacant") break;
        cout << mi << endl;
        cin >> s;
        if ((s0 == s) ^ (mi % 2 == 0)) lo = mi + 1;
        else hi = mi - 1;
        mi = (lo + hi) / 2;
    }
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:36:24: error: break statement not within loop or switch
   36 |     if (s == "Vacant") break;
      |                        ^~~~~
a.cc:40:24: error: break statement not within loop or switch
   40 |     if (s == "Vacant") break;
      |                        ^~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template<typename Q_temp>
using smaller_queue = priority_queue <Q_temp, vector<Q_temp>, greater<Q_temp> >;

const int INF = 1000000000;
const ll LINF = (ll) 4000000000000000000;
const ll MOD = (ll) 1000000007;
const double PI = acos(-1.0);
const int limit = 100010;

#define REP(i,m,n) for(ll i = m; i < (ll)(n); ++i)
#define rep(i,n) REP(i, 0, n)
#define MP make_pair
#define YES(n) cout << ((n) ? "YES" : "NO") << endl
#define Yes(n) cout << ((n) ? "Yes" : "No") << endl
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << endl
#define NP(v) next_permutation(v.begin(),v.end())
//------------------------------------------------------

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;
    cout << 0 << endl;
    string s, s0;
    cin >> s;
    s0 = s;
    int lo = 0, hi = n - 1;
    int mi = (lo + hi) / 2;

    while (s != "Vacant") {
        cout << mi << endl;
        cin >> s;
        if ((s0 == s) ^ (m % 2 == 0)) lo = mi;
        else hi = mi;
        mi = (lo + hi) / 2;
    }
    return 0;

}



Compiler output:
a.cc: In function 'int main()':
a.cc:43:26: error: 'm' was not declared in this scope; did you mean 'mi'?
   43 |         if ((s0 == s) ^ (m % 2 == 0)) lo = mi;
      |                          ^
      |                          mi
Language: C++

#include <bits/stdc++.h>

using namespace std;

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template<typename Q_temp>
using smaller_queue = priority_queue <Q_temp, vector<Q_temp>, greater<Q_temp> >;

const int INF = 1000000000;
const ll LINF = (ll) 4000000000000000000;
const ll MOD = (ll) 1000000007;
const double PI = acos(-1.0);
const int limit = 100010;

#define REP(i,m,n) for(ll i = m; i < (ll)(n); ++i)
#define rep(i,n) REP(i, 0, n)
#define MP make_pair
#define YES(n) cout << ((n) ? "YES" : "NO") << endl
#define Yes(n) cout << ((n) ? "Yes" : "No") << endl
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << endl
#define NP(v) next_permutation(v.begin(),v.end())
//------------------------------------------------------

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;
    cout << 0 << endl;
    string s, s0;
    cin >> s;
    s0 = s;
    int lo = 0, hi = n - 1;
    int mi = (lo + hi) / 2;

    while (s != "Vacant") {
        cout << m << endl;
        cin >> s;
        if ((s0 == s) ^ (m % 2 == 0)) lo = mi;
        else hi = mi;
        mi = (lo + hi) / 2;
    }
    return 0;

}



Compiler output:
a.cc: In function 'int main()':
a.cc:41:17: error: 'm' was not declared in this scope; did you mean 'mi'?
   41 |         cout << m << endl;
      |                 ^
      |                 mi
Language: C++

#include <iostream>
#include <stdio.h>
#include <fstream>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <queue>
#include <vector>
#include <limits.h>
#include <math.h>
#include <functional>

#define repeat(i,n) for (long long i = 0; (i) < (n); ++ (i))
#define debug(x) cerr << #x << ": " << x << '\n'
#define debugArray(x,n) for(long long i = 0; (i) < (n); ++ (i)) cerr << #x << "[" << i << "]: " << x[i] << '\n'

using namespace std;

typedef long long ll;
typedef pair<int,int> Pii;
typedef vector<int> vint;
typedef vector<ll> vll;
const ll INF = INT_MAX;

int main() {
  int N;
  cin >> N;
  cout << 0 << endl;
  string in;
  cin >> in;
  if(in == "Vacant"){
    return 0;
  }
  bool lg = in == "Male",rg = in == "Male";
  int l=0,r=N;
  repeat(i,19){
    int mid = (l+r)/2;
    cout << mid << endl;
    cin >> in;
    if(in == "Vacant"){
      return 0;
    }
    if(lg == rg){
      if(lg == (in == "Male")){
        l = mid;
      }else{
        rg = in == "Male";
        r = mid;
      }
    }else{
      if(lg == (in == "Male")){
        rg = in == "Male";
        r = mid;
      }else{
        l = mid;
      }
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:60:2: error: expected '}' at end of input
   60 | }
      |  ^
a.cc:26:12: note: to match this '{'
   26 | int main() {
      |            ^
Language: C

#include<bits/stdc++.h>

int main()
{
	long n; std::cin>>n; return std::cout<<n-1<<std::endl<<"Vacant"<<std::endl,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;
string s;
int n,danh,a[1000000],l,r,mid;
int kt(int o)
{
		cout<<o<<endl;
		fflush(stdout);
		cin>>s;
		if(s=="Vacant") return 0;
		else if(s=="Male") return 1;
		     else if(s=="Female") return 2;
}
main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin>>n;
	danh=0;
	a[0]=kt(0);
	if(a[0]==0) return 0;
	a[n-1]=kt(n-1)
	if(a[n-1]==0) return 0;
	l=0;
	r=n-1;
	while(l<r)
	  {
	  	mid=(l+r)/2;
	  	a[mid]=kt(mid);
	  	if(a[mid]==0) return 0; 
	  	if(abs(a[l]-a[mid]) != (mid % 2)) r=mid;
	  	  else l=mid;
	  }
	cout<<l<<endl;
	fflush(stdout);
}

Compiler output:
a.cc:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main()
      | ^~~~
a.cc: In function 'int main()':
a.cc:23:23: error: expected ';' before 'if'
   23 |         a[n-1]=kt(n-1)
      |                       ^
      |                       ;
   24 |         if(a[n-1]==0) return 0;
      |         ~~             
a.cc: In function 'int kt(int)':
a.cc:13:1: warning: control reaches end of non-void function [-Wreturn-type]
   13 | }
      | ^
Language: C

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

#define int long long

signed main()
{
	int N; scanf("%lld",&N); return cout<<N-1<<endl<<"Vacant",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 n, mid, l, r, ty;
string s;

int check(int i)    {
    cout << i << '\n'; cout.flush();
    cin >> s;
    if(s == "Male") return 1;
    else if(s == "Female") return 2;
    else return 0;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    cin >> n;
    int l = 0, r = n - 1;
    int las = check(0);
    if(!las) return 0;    
    
    while(l + 1 != r)    {
        int mid = (l + r) / 2;
        int tmp = check(mid);
        if((tmp == las && tmp % 2 == 0) || (tmp != las && tmp % 2)) r = mid;
        else l = mid;
    }

    lasl = check(l); cout.flush();
    if(!lasl) return 0;
    else {
        cout << r << '\n'; cout.flush();
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:5: error: 'lasl' was not declared in this scope; did you mean 'las'?
   32 |     lasl = check(l); cout.flush();
      |     ^~~~
      |     las
Language: C++

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

int n, mid, l, r, ty;
string s;

int check(int i)    {
    cout << i << '\n'; cout.flush();
    cin >> s;
    if(s == "Male") return 1;
    else if(s == "Female") return 2;
    else return 0;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    cin >> n;
    int l = 0, r = n - 1;
    int lasl = check(0);    if(!lasl) return 0;
    int lasr = check(n - 1); if(!lasr) return 0;
    while(l + 1 < r)    {
        int mid = (l + r) / 2;
        int tmp = check(mid);
        if(!tmp) return 0;
        if((tmp == lasl && (mid - l) % 2 == 0) || (tmp != lasl && (mid - l) % 2)) lasr = tmp, r = mid;
        else l = mid, lasl = tmp;
    }
    lasl = check(l); cout.flush() if(!lasl) return 0;
    else {
        cout << r << '\n'; cout.flush();
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:34: error: expected ';' before 'if'
   31 |     lasl = check(l); cout.flush() if(!lasl) return 0;
      |                                  ^~~
      |                                  ;
a.cc:32:5: error: 'else' without a previous 'if'
   32 |     else {
      |     ^~~~
Language: C++

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


#if __cplusplus >= 201103L
typedef int64_t llint;
#else
typedef long long int llint;
#endif

#ifdef ENG
void init()
{
	string filename = "a";
	string input_ext = "inp", output_ext = "out", debug_ext = "debugging";
	string 	input_filename = filename + '.' + input_ext,
			output_filename = filename + '.' + output_ext,
			debug_filename = filename + '.' + debug_ext;

	cerr << "Input file :: " << input_filename << endl;
	cerr << "Output file :: " << output_filename << endl;
	cerr << "Debugging file (stderr) :: " << debug_filename << endl;
	if (freopen (input_filename.c_str(), "r", stdin) == nullptr) return cerr << "No input files\n", 0;
	freopen (output_filename.c_str(), "w", stdout);
	freopen (debug_filename.c_str(), "w", stderr);
}
#endif
const bool men = 1, women = 0;
bitset <200005> sex;
llint length; 

int main()
{
	#ifdef ENG
	init();
	#endif

	cin >> length;
	// guess initial value
	if (printf("0\n") || 1)
	{
		cout.flush();
		string str; cin >> str;
		if (str.front() == 'V') exit(0);
		else sex[0] = (str.front() == 'M' ? men : women);
	}
	else
	{
		llint first = 1, last = length - 1;
		while (first < last)
		{
			llint mid = (first + last) >> 1;
			// 
			cout << mid << endl;
			string str; cin >> str;
			if (str.front() == 'V') return cout << mid << endl, 0;
			char out;
			if (mid & 1)
			{
				if (str.front() == 'M') out = 'W';
				else out = 'M';
			}
			else out = str.front();
			if (str.front() == out)
			{
				first = mid + 1;
			}
			else last = mid;
		};
		return cout << l << endl, 0;
	}

}

Compiler output:
a.cc: In function 'int main()':
a.cc:70:32: error: 'l' was not declared in this scope
   70 |                 return cout << l << endl, 0;
      |                                ^
Language: C++

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

int n, mid, l, r, ty;
string s, lasl, lasr;

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    cin >> n;
    cout << "0\n";
    fflush(stdout);

    cin >> s;
    if(s == "Vacant") return 0;
    lasl = s;

    mid = n / 2;
    cout << mid << '\n'; fflush(stdout);
    cin >> s;
    if(s == "Vacant") return 0;
    if(s == lasl)    {
        if(mid % 2) {
            l = 0, r = mid, lasr = s;
        } else {
            l = mid, r = n, lasr = lasl, lasl = s;
        }
    } else {
        if(mid % 2 == 0)
            l = 0, r = mid, lasr = s;
        else l = mid, r = n, lasl = lasr, lasl = s;
    }

    while(l + 1 < r)   {
        int mid = (l + r) / 2;
        cout << (mid % n) << '\n'; fflush(stdout);
        cin >> s;
        if(s == "Vacant") return 0;
        if(s == lasl && (mid - l) % 2 == 1) lasr = s, r = mid;
        else if(s != lasl && (mid - l) % 2 == 0) lasr = s, r = mid;
        else if(s == lasr && (r - mid) % 2) lasl = s, l = mid;
        else if(s != lasr && (r - mid) % 2 == 0) l = mid, lasl = s;
    }
    for(int i = l; i <= r; ++i) {
        cout << (i % n) << '\n'; fflush(stdout);
        cin >> s; if(s == "Vacant") return 0;
    }
}


Compiler output:
a.cc:2:10: fatal error: grader.h: No such file or directory
    2 | #include "grader.h"
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include<bits/stdc++.h>

using namespace std;

const int N = 99999;
int vis[N];
int check(int i){
	printf("%d\n", i);
    fflush(stdout);
    char ans[10];
    scanf("%s", ans);
    if (strcmp(ans, "Vacant") == 0) return 0;
    if (strcmp(ans, "Male") == 0) return 1;
    return 2;
}
signed main(){
	int l = 0, r = N - 1, vis[0] = check(0);
	while(l <= r){
		int mid = l + r >> 1;
		int vis[mid] = check(mid); 
		if(!vis[mid]){
			printf("%d\n",mid);
    		fflush(stdout);
		}
		else if(vis[mid] != vis[l]){
			if((mid - l) & 1) l = mid;
			else r = mid - 1;
		} 	
		else{
			if((mid - l) & 1) r = mid - 1;
			else l = mid;
		}
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:45: error: array must be initialized with a brace-enclosed initializer
   17 |         int l = 0, r = N - 1, vis[0] = check(0);
      |                                        ~~~~~^~~
a.cc:20:37: error: array must be initialized with a brace-enclosed initializer
   20 |                 int vis[mid] = check(mid);
      |                                ~~~~~^~~~~
Language: C++

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

int seat[100000];
int ok(string s){
	if(s == "Vacant") return 0;
	else if(s == "Male") return 1;
	else return 2;
}

int main()
{
	int n;
	cin >> n;
	int l = 0, r = n - 1, a;
	string val;
	cout << l << endl;
	fflush(stdout);
	cin >> val;
	seat[l] = ok(val);
	cout << r << endl;
	fflush(stdout);
	cin >> val;
	seat[r] = ok(val);
	if(!seat[l] || !seat[r]) return 0;
		while(l != r - 1){
		int mid1 = (l + r) / 2;
		cout << mid1 << endl;
		fflush(stdout);
		cin >> val;
		seat[mid1] = ok(val);
		if(!seat[mid2]) return 0;		
		if(abs(seat[mid1] - seat[l]) != (mid1 - l) % 2) r = mid1;
		else l = mid1;
	}
	cout << l << endl;
	fflush(stdout);
	cin >> val;
	if(!seat[l]) return 0;
	cout << r << endl;
	fflush(stdout);
	cin >> val;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:26: error: 'mid2' was not declared in this scope; did you mean 'mid1'?
   32 |                 if(!seat[mid2]) return 0;
      |                          ^~~~
      |                          mid1
Language: C++

#include<cstdio>
#include<iostream>
#include<cstring>
#include<vector>
using namespace std;
#define MAXN 99999
int Query(int ans){
    char ret[20];
    printf("%d\n", ans);
	fflush(stdout);
    scanf("%s", ret);
    if(ret[0] == 'V') exit(0);
    return ret[0] == 'M' ? 1 : 0;
}
int n;
int a[MAXN+5];
int main()
{
	scanf("%d",&n);
	int l=0,r=n-1;
	int ls=Query(l);
	int rs=Query(r);
	while(1)
	{
		int mid=(l+r)/2;
		int ms=Query(mid);
		if(((mid-l)&1)==(ms==ls)
			l=mid;
		else r=mid;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:41: error: expected ';' before 'l'
   27 |                 if(((mid-l)&1)==(ms==ls)
      |                                         ^
      |                                         ;
   28 |                         l=mid;
      |                         ~                
a.cc:29:17: error: expected primary-expression before 'else'
   29 |                 else r=mid;
      |                 ^~~~
a.cc:28:31: error: expected ')' before 'else'
   28 |                         l=mid;
      |                               ^
      |                               )
   29 |                 else r=mid;
      |                 ~~~~           
a.cc:27:19: note: to match this '('
   27 |                 if(((mid-l)&1)==(ms==ls)
      |                   ^
Language: C++

#include<cstdio>
#include<iostream>
#include<cstring>
#include<vector>
using namespace std;
#define MAXN 99999
int Query(int ans){
    char ret[20];
    printf("%d\n", ans);
	fflush(stdout);
    scanf("%s", ret);
    if(ret[0] == 'V') exit(0);
    return ret[0] == 'M' ? 1 : 0;
}
int a[MAXN+5];
int nxt[MAXN+5];
bool ch[MAXN+5];
int n;
int Find()
{
	int maxi=0,ret=-1;
	for(int i=0;;)
	{
		int j=nxt[i];
		if(j-i>maxi)
		{
			maxi=j-i;
			ret=i;
		}
		if(j==n)
			break;
	}
	return ret;
}
int check(int i,int mid,int j)
{
	if((i&1)==(mid&1))
	{
		if(a[i]!=a[mid]) return i;
	}
	else if(a[i]==a[mid]) return i;
	if((mid&1)==(j&1))
	{
		if(a[mid]!=a[j]) return mid;
	}
	else if(a[mid]==a[j]) return mid;
	return -1;
}
int main()
{
	scanf("%d",&n);
	memset(a,-1,sizeof a);
	a[n/2]=Query(n/2);
	a[0]=Query(0);
	a[n]=a[0];
	if(n==3) Query(2);
	a[n/4]=Query(n/4);
	a[(n+n/2)/2]=Query((n+n/2)/2);
	nxt[0]=n/4,nxt[n/4]=n/2,nxt[n/2]=(n+n/2)/2,nxt[(n+n/2)/2]=n;
	int i=check(0,n/4,n/2);
	if(i==-1)
		i=check(n/2,(n+n/2)/2,n);
	if(i==-1)
		i=Find();
	while(1)
	{
		int j=nxt[i];
		int mid=i+(j-i+n)%n/2;
		nxt[i]=mid,nxt[mid]=j;
		Query(mid);
		i=check(i,mid,j);
		if(i==-1)
			i=Find(i);
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:73:31: error: too many arguments to function 'int Find()'
   73 |                         i=Find(i);
      |                           ~~~~^~~
a.cc:19:5: note: declared here
   19 | int Find()
      |     ^~~~
Language: C++

#include <cstdio>
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <iomanip>
#include <utility>
#include <vector>
#include <queue>
#include <algorithm>
#include <set>
#include <map>
#include <string>
#include <cctype>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<char> vc;
typedef vector<ll> vl;
typedef queue<int> qi;
typedef queue<ll> ql;
typedef pair<ll,ll> pll;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
#define pq priority_queue
#define rep(i,n) for (int i=1;i<=n;++i)
#define mp make_pair
#define pb push_back
#define pf push_front
#define F first
#define S second
#define INF 20000000095
#define init(x) memset(x,0,sizeof(x))
int n,div;
string s="";
int a[100005];
bool det[100005];
inline int hash(string str){
	if (str=="Male") return 0;
	else return 1;
}
int main()
{
    ios::sync_with_stdio(false);
	cin>>n;
	cout<<0<<endl;
	fflush(stdout);
	cin>>s;
	a[0]=hash(s);
	div=n/2;
	for (int i=1;i<n;++i) a[i]=!a[i-1];
	if (n<=20){
		for (int i=1;i<n&&s!="Vacant";++i){
			cout<<i<<endl;
			fflush(stdout);
			cin>>s;
		}
		return 0;
	}
	while(s!="Vacant"){
		
	}
	return 0;
}

Compiler output:
a.cc:34:7: error: 'int div' redeclared as different kind of entity
   34 | int n,div;
      |       ^~~
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/ext/string_conversions.h:43,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:2:
/usr/include/stdlib.h:992:14: note: previous declaration 'div_t div(int, int)'
  992 | extern div_t div (int __numer, int __denom)
      |              ^~~
a.cc: In function 'int main()':
a.cc:49:14: error: reference to 'hash' is ambiguous
   49 |         a[0]=hash(s);
      |              ^~~~
In file included from /usr/include/c++/14/string_view:50,
                 from /usr/include/c++/14/bits/basic_string.h:47:
/usr/include/c++/14/bits/functional_hash.h:59:12: note: candidates are: 'template<class _Tp> struct std::hash'
   59 |     struct hash;
      |            ^~~~
a.cc:38:12: note:                 'int hash(std::string)'
   38 | inline int hash(string str){
      |            ^~~~
a.cc:50:15: error: overloaded function with no contextual type information
   50 |         div=n/2;
      |               ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(i,a) for(int i=0;i<(a);i++)
#define MOD 1000000007

char query(int x){
  cout<<x<<endl;
  string tmp;
  cin>>tmp;
  fflush(stdout);
  return tmp[0];
}

void main(){
  int N;
  cin>>N;
  char t0=query(0);
  if(t0=='V'){
    return;
  }
  int ub=N, lb=1;
  rep(i,19){
    int mid=(lb+ub)/2;
    char x=query(mid);
    if(x=='V'){
      return;
    }
    if((mid%2==1 and t0!=x) or (mid%2==0 and t0==x)){
      lb=mid+1;
    }else{
      ub=mid;
    }
  }
  return;
}


Compiler output:
a.cc:16:1: error: '::main' must return 'int'
   16 | void main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:21:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   21 |     return;
      |     ^~~~~~
a.cc:28:7: error: return-statement with no value, in function returning 'int' [-fpermissive]
   28 |       return;
      |       ^~~~~~
a.cc:36:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   36 |   return;
      |   ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int n,a[100010];string s;
int xia(int x){return (x+1)%n;}
int main()
{
scanf("%d",&n);
memset(a,-1,sizeof a);
for (int t=20,i=0;t--;)
  {
  printf("%d\n",i);a[i]=1;
  fflush(output);
  cin>>s;
  if (s[0]=='V') return 0;
  if (s[0]=='M') i=(i+n)/2;
  else i/=2;
  for (;a[i]!=-1;i=xia(i));
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:10: error: 'output' was not declared in this scope
   12 |   fflush(output);
      |          ^~~~~~
Language: C++

#include <stdio.h>
#include <iostream>
#include <vector>
#include <string.h>
using namespace std;
int main()
{
    int n;
    scanf("%d",&n);
    int ar[n];
    for (int i=0;i<n;i++)
    {
        ar[i]=0;
    }
    int x=0;
    char ram[500];
    int q=20;
    while (q--)
    {
        printf ("%d\n",x);
        fflush(stdout);
        scanf("%s",ram);
        if (!strcmp(ram,"Vacant"))
		{
			break;
		}
        else if (!strcmp(ram,"Male"))
        {
            ar[x]=1;
			if (ar[(x+n-2)%n]+ar[x]==0)
			{
				x=(x+n-1)%n;
			}
            else if (ar[(x+2)%n]+ar[x]==0)
            {
            	x=(x+1)%n;
			}
			else
			{
				x+=2;
				x%=n;
			}
        }
        else
        {
            ar[x]=-1;
			if (ar[(x+n-2)%n]+ar[x]==0)
			{
				x=(x+n-1)%n;
			}
            else if (ar[(x+2)%n]+ar[x]==0)
            {
            	x=(x+1)%n;
            	f=1;
            	break;
			}
			else
			{
				x+=2;
				x%=2;
			}
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:54:17: error: 'f' was not declared in this scope
   54 |                 f=1;
      |                 ^
Language: C++

#include <stdio.h>
#include <iostream>
#include <vector>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int ar[n];
    for (int i=0;i<n;i++)
    {
        ar[i]=0;
    }
    int x=0;
    char rem[500];
    while (1<2)
    {
        printf ("%d",x);
        fflush(stdout);
        scanf("%s",ram);
        if (!strcmp(ram,"Vacant"))break;
        else if (!strcmp(ram,"Male"))
        {
            ar[x]=1;
        }
        else
        {
            ar[x]=-1;
        }
        while (ar[x]!=0)
        {
            x++;
            x%=n;
        }
    }
    printf ("%d\n",x);
    fflush(stdout);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:20: error: 'ram' was not declared in this scope; did you mean 'rem'?
   20 |         scanf("%s",ram);
      |                    ^~~
      |                    rem
a.cc:21:14: error: 'strcmp' was not declared in this scope
   21 |         if (!strcmp(ram,"Vacant"))break;
      |              ^~~~~~
a.cc:4:1: note: 'strcmp' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    3 | #include <vector>
  +++ |+#include <cstring>
    4 | using namespace std;
Language: C++

#include <iostream>
#include <cstdio>

using namespace std;

int N;
string s,nxt;

int ask(int n)
{
    cout << n << endl;
    string t;
    cin >> t;
    if (t == "Male") return 1;
    if (t == "Female") return -1;
    if (t == "Vacant") exit(0);
}

void solve()
{
    cin >> N;
    int i = ask(0);
    int j = ask(N-1);
    int l = 0, r = N-1;
    while (true)
    {
        int mid = (l+r)/2;
        int m = ask(mid);
        if ((mid - l)%2 == 0)
        {
            if (i != m) r = mid;
            else l = mid;
        }
        else
        {
            if (i != m) l = mid;
            else r = mid;
        }
    }
    return 0;
}

int main()
{
    //freopen("inp.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    solve();
    return 0;
}

Compiler output:
a.cc: In function 'void solve()':
a.cc:40:12: error: return-statement with a value, in function returning 'void' [-fpermissive]
   40 |     return 0;
      |            ^
a.cc: In function 'int ask(int)':
a.cc:17:1: warning: control reaches end of non-void function [-Wreturn-type]
   17 | }
      | ^
Language: C++

#include<stdio.h>

int main() {
	int N = 0;

	cin >> N;

	int begin = 0;
	int mid = N - 1;
	int end = N;
	char str[10];

	printf("0\n");
	scanf("%s", str);
	
	while (str[0] != 'V') {
		char s[10];

		printf("%d\n", mid);
		scanf("%s", s);

		if (s[0] == str[0]) {
			begin = mid;
		}
		else {
			end = mid + 1;
		}
		str[0] = s[0];
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin >> N;
      |         ^~~
Language: C++

#include<iostream>
#include<iomanip>
#include<queue>
#include<string>
#include<stack>
#include<cstdio>
#include<cstdlib>
#include<cmath>
#include<cstring>
#include<cassert>
#include<ctime>
#include<algorithm>
#include<utility>
#include<map>
#include<set>
#include<vector>
#include<functional>
#include<complex>

using namespace std;

typedef long long            ll;
typedef unsigned             ui;
typedef unsigned long long   ull;
typedef pair<int,int>        i_i;
typedef pair<ll,int>         ll_i;
typedef pair<ll,ll>          ll_ll;
typedef pair<double,int>     d_i;
typedef pair<double,double>  d_d;
typedef vector<int>          vi;
typedef vector<vector<int> > vii;

#ifdef DEBUG
#define dprintf      printf
#define dputs        puts
#define dout(x)      cout<<#x" = "<<(x)<<endl
#define darray(x,n)  {int i;rep(i,n)cout<<#x"["<<i<<"] = "<<*((x)+i)<<endl;}
#define dloop(i,s,g) for(int (i)=(s);(i)<(g);(i)++)
#define drep(i,n)    for(int (i)=0;(i)<(n);(i)++)
#define dstop()      scanf("%*c")
#else
#define dprintf      (1)?0:printf
#define dputs        (1)?0:puts
#define dout(x)
#define darray(x,n)
#define dloop(i,s,g) if(int i=0){}else
#define drep(i,n)    if(int i=0){}else
#define dstop()
#endif

#define F    first
#define S    second
#define pb   push_back
#define mp   make_pair

#define loop(i,s,g) for((i)=(s);(i)<(g);(i)++)
#define rep(i,n)    for((i)=0;(i)<(n);(i)++)
#define all(x)      (x.begin(),x.end())
#define in(T,...) T __VA_ARGS__; impl(__VA_ARGS__)
#define array(T,id,n) T id[(n)]; for(int i=0;i<(n);i++)cin>>id[i]
#define putv(n)     cout<<(n)<<endl

//#define int long long
#ifndef int
#define INF __INT32_MAX__
#else
#define INF __INT64_MAX__
#endif

void impl(){};
template <typename T,typename... TS >
void impl(T &head,TS &... tail)
{
  cin>>head;
  impl(tail ...);
}

string query(int q)
{
  string ans;
  putv(q);
  fflush(stdout);
  cin>>ans;
  return ans;
}

signed main(void)
{
  string ans;
  int start;
  int i;
  in(int,n);
  ans=query(0);
  if(ans=="Male")
    start=0;
  else if(ans=="Female")
    start=1;
  else
    exit(0);
  string correct[112345];
  string mf[2];
  mf[start]="Male";
  mf[!start]="Female";
  rep(i,n)
    correct[i]=mf[i%2];
  int tmp=n/2;
  int now=0;
  string before="high";
  for(i=0;i<19;i++)
    {
      if(before=="high")
        now+=tmp;
      else
        now-=tmp;
      tmp=tmp/2;
      if(tmp==0)
        tmp=1;
      ans=query(now);
      if(ans=="Vacant")
        exit(0);
      else if(ans==correct[now])
        before="high";
      else
        before="low";
    }
  exit(1)
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:126:10: error: expected ';' before 'return'
  126 |   exit(1)
      |          ^
      |          ;
  127 |   return 0;
      |   ~~~~~~