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

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

typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<ll> vl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef pair<int,int> pii;
typedef pair<double, double> pdd;
typedef pair<ll, ll> pll;
typedef vector<pii> vii;
typedef vector<pll> vll;
typedef vector<pdd> vdd;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define mem(a,b) memset(a, b, sizeof(a) )
#define all(x) (x).begin(),(x).end()
#define INF 1000000000000
#define MOD 1000000007
#define PB push_back
#define MP make_pair
#define F first
#define S second

inline void normal(ll &a) { a %= MOD; (a < 0) && (a += MOD); }
inline ll modMul(ll a, ll b) { a %= MOD, b %= MOD; normal(a), normal(b); return (a*b)%MOD; }
inline ll modAdd(ll a, ll b) { a %= MOD, b %= MOD; normal(a), normal(b); return (a+b)%MOD; }
inline ll modSub(ll a, ll b) { a %= MOD, b %= MOD; normal(a), normal(b); a -= b; normal(a); return a; }
inline ll modPow(ll b, ll p) { ll r = 1; while(p) { if(p&1) r = modMul(r, b); b = modMul(b, b); p >>= 1; } return r; }
inline ll modInverse(ll a) { return modPow(a, MOD-2); }
inline ll modDiv(ll a, ll b) { return modMul(a, modInverse(b)); }

ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}

int ctoi(char c) {
	if (c >= '0' && c <= '9') {
		return c - '0';
	}
	return 0;
}

int main(){
    int n;cin>>n;
    cout<<0<<endl<<flush;
    string s,t,R,L;
    cin>>s;
    R=s;
    if(s=="Vacant")return 0;
    cout<<n-1<<endl<<flush;
    cin>>t;
    L=t;
    if(t=="Vacant")return 0;

    int l=0,r=n,cnt=2;
    while(cnt<20){
        int m=(l+r)/2;
        cout<<m<<endl<<flush;
        cin>>s;
        if(s=="Vacant")return 0;
        if(m%2==0){
            if(s==L){l=m;}
            else r=mid;
        }
        else{
            if(s==R){l=m;L=s;}
            else {r=m;R=s;}
        }
        cnt++;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:66:20: error: 'mid' was not declared in this scope
   66 |             else r=mid;
      |                    ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define INF 1LL<<62
#define inf 1000000007

int main() {
	ll n;
	cin>>n;
	ll l=0;
	string L;
	cout << 0;
	cin >>L;
	if(L=="Vacant"){
		return 0;
	}
	ll next=(n-l)/2;
	string ne;
	while(){
		cout << next;
		cin>>ne;
		if(ne=="Vacant"){
			return 0;
		}
		if(ne==L){
			if((l-next)%2==0){
				l=ne;
			}
			else{
				n=ne;
			}
		}
		else{
			if((l-next)%2==0){
				ne=ne;
			}
			else{
				l=ne;
			}
		}
		ne=(n-l)/2;
	}
	// your code goes here
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:15: error: expected primary-expression before ')' token
   19 |         while(){
      |               ^
a.cc:27:35: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'll' {aka 'long long int'} in assignment
   27 |                                 l=ne;
      |                                   ^~
      |                                   |
      |                                   std::string {aka std::__cxx11::basic_string<char>}
a.cc:30:35: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'll' {aka 'long long int'} in assignment
   30 |                                 n=ne;
      |                                   ^~
      |                                   |
      |                                   std::string {aka std::__cxx11::basic_string<char>}
a.cc:38:35: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'll' {aka 'long long int'} in assignment
   38 |                                 l=ne;
      |                                   ^~
      |                                   |
      |                                   std::string {aka std::__cxx11::basic_string<char>}
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <map>
#include <algorithm>
#include <iomanip>
#include <math.h>
#include <string.h>
#include <cstdio>
#include <tuple>
using namespace std; using ll = long long; using pll = pair<ll, ll>;
using vl = vector<ll>; using vll = vector<vl>; using vpll = vector<pll>;
//**デバッグ準備**//
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail>
void debug_out(Head h, Tail... t) {
	cerr << " " << h;
	if (sizeof...(t) > 0) cerr << " :";
	debug_out(t...);
}
template <typename T>
ostream& operator<<(ostream& os, vector<T> vec) {
	for (size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");
	return os;
}
ll ctoi(char c) {
	switch (c) {
	case '0': return 0; case '1': return 1; case '2': return 2;
	case '3': return 3; case '4': return 4; case '5': return 5;
	case '6': return 6; case '7': return 7; case '8': return 8;
	case '9': return 9;  default: return 0;
	}
}
bool pairCompare(const pll firstElof, pll secondElof)
{
	return firstElof.first > secondElof.first;
}
//**Snippetリスト**//
//rep, vin, all, iteLoop//
//gcdlcm, isPrime, eratos, Npow, divisor, modinv, bitSearch, bitList, dfs, bfs//
//dijkstra, WarshallFloyd, BellmanFord, UnionFind, COM, digitDP ,RMQ//
ll i, j, k, l; ll N, M, K, H, W, L, X, Y, Z;
ll MOD = 1000000007; ll INF = 1LL << 60; ll ans = 0; ll z = 0, o = 1;
vl flag, color, D, Ans, inter; vll path;
int main() {
	cin >> N;
	cout << 0 << endl;
	cout << flush;
	string s;
	string f;
	cin >> s;
	if (s == "Vacant") { return; }
	f = s;
	ll left = 0;
	ll right = N - 1;
	ll mid = (left + right) / 2;
	for (i = 0;; i++) {
		mid = (left + right) / 2;
		cout << mid << endl;
		cout << flush;
		string s;
		cin >> s;
		if (s == "Vacant") { return; }
		if ((mid % 2 == 1 && s == f) || (mid % 2 == 0 && s != f)) right = mid-1;
		else left = mid + 1;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:56:30: error: return-statement with no value, in function returning 'int' [-fpermissive]
   56 |         if (s == "Vacant") { return; }
      |                              ^~~~~~
a.cc:67:38: error: return-statement with no value, in function returning 'int' [-fpermissive]
   67 |                 if (s == "Vacant") { return; }
      |                                      ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,T;
  cin >> n;
  ll a=0,b=n;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"){
    ll m=(a+b)/2;
    cout << m << endl;
    cin >> T;
    if(((T!=t)&&(a-b)%2==0)||((T==t)&&(a-b)%2!=0)){
      b=a;
    }
    a=m;
    t=T;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:11: error: 'l' was not declared in this scope
   20 |   cout << l << endl;
      |           ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,T;
  cin >> n;
  ll a=0,b=n;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"){
    ll m=(l+r)/2;
    cout << m << endl;
    cin >> T;
    if(((T!=t)&&(a-b)%2==0)||((T==t)&&(a-b)%2!=0){
      b=a;
    }
    a=m;
    t=T;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:11: error: 'l' was not declared in this scope
   20 |   cout << l << endl;
      |           ^
a.cc:23:13: error: 'r' was not declared in this scope
   23 |     ll m=(l+r)/2;
      |             ^
a.cc:26:50: error: expected ';' before '{' token
   26 |     if(((T!=t)&&(a-b)%2==0)||((T==t)&&(a-b)%2!=0){
      |                                                  ^
      |                                                  ;
a.cc:29:8: error: expected ')' before ';' token
   29 |     a=m;
      |        ^
      |        )
a.cc:26:7: note: to match this '('
   26 |     if(((T!=t)&&(a-b)%2==0)||((T==t)&&(a-b)%2!=0){
      |       ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,T;
  cin >> n;
  ll l=0,r=n;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"&&(r-l)!=1){
    ll m=(l+r)/2;
    cout << m << endl;
    cin >> T;
    if(((m-l)%2==0&&T!=t)||(T==t&&(m-l)%2==1))
      l=m;
    else
      r=m;
      t=T;
    }
  }
}


Compiler output:
a.cc:33:1: error: expected declaration before '}' token
   33 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,T;
  cin >> n;
  ll l=0,r=n;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"&&(r-l)!=1){
    ll m=(l+r)/2;
    cout << m << endl;
    cin >> T;
    if(((d-l)%2==0&&T!=t)||(T==t&&(d-l)%2==1))
      l=m;
    else
      r=m;
      t=T;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:10: error: 'd' was not declared in this scope
   26 |     if(((d-l)%2==0&&T!=t)||(T==t&&(d-l)%2==1))
      |          ^
a.cc: At global scope:
a.cc:33:1: error: expected declaration before '}' token
   33 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,k;
  cin >> n;
  ll l=0,r=n-1;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"&&r-l!=1){
    ll d=(l+r)/2;
    k=t;
    cout << d << endl;
    cin >> t;
    if(t!="Vacant"){
      if(((d-l)%2==0&&k!=t)||(k==t&&(d-l)%2==1)){
        l=d;
      }
      else
        r=d;
    }
  }
  if(r-l==1&&t!="Vacant"){
    cout << r << endl;
    cin >> t
    if(t!="Vacant"){
      cout << l << endl;
      cin >> t;
    }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:37:13: error: expected ';' before 'if'
   37 |     cin >> t
      |             ^
      |             ;
   38 |     if(t!="Vacant"){
      |     ~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
const ll MOD=1000000007;
const double PI=3.14159265358979;
const ll INF= pow(10,18);
typedef pair<ll,ll> P;
typedef vector<ll> vl;
typedef vector<vl> vvl;
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define rep(i,n) FOR(i,0,n)
string abc="abcdefghijklmnopqrstuvwxyz";
string ABC="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

int main() {
  ll n;
  string t,k;
  cin >> n;
  ll l=0,r=n-1;
  cout << l << endl;
  cin >> t;
  while(t!="Vacant"&&r-l!=1){
    d=(l+r)/2;
    k=t;
    cout << d << endl;
    cin >> t;
    if(t!="Vacant"){
      if((d-l)%2==0&&k!=t)||(k==t&&(d-l)%2==1)){
        l=d;
      }
      else
        r=d;
    }
  }
  if(r-l==1&&t!="Vacant"){
    cin >> r;
    cout << t << endl;
    if(t!="Vacant"){
      cin >> l;
      cout << t << endl;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:5: error: 'd' was not declared in this scope
   23 |     d=(l+r)/2;
      |     ^
a.cc:28:27: error: expected primary-expression before '||' token
   28 |       if((d-l)%2==0&&k!=t)||(k==t&&(d-l)%2==1)){
      |                           ^~
Language: C++

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

ll MOD = 1e9+7;

int main(){
    ll N; cin >> N;
    ll l = 0, r = N, m;

    cout << 0 << endl;
    string S; cin >> S;
    if(S == "Vacant") return 0;
    /*cout << N-1 << endl;
    string _; cin >> _;
    if(_ == "vacant") return 0;*/

    while(1){
        m = (l+r)/2;
        cout << m << endl;
        string T; cin >> T;
        if(T == "Vacant") return 0;
        if((m%2&&S!=T)||(m%2==0&&S==T)) l = m+1
        /*if(((m)% 2 == 0 && S == T) || ((m)%2 == 1 && S != T)){
            l = m+1;
        }*/
        else{
            r = m;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:48: error: expected ';' before 'else'
   23 |         if((m%2&&S!=T)||(m%2==0&&S==T)) l = m+1
      |                                                ^
      |                                                ;
......
   27 |         else{
      |         ~~~~
Language: C++

#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int n,s,g,m;
string t;
int main(void){
    cin>>n;
    g=n;
    cout<<s<<endl;
    cin>>t;
    while(t!="Vacant"){
        m=(s+g)/2;
        cout<<m<<endl;
        cin>>t1;
        if((t1==t)^(l%2==m%2))s=g;
        g=m;
        t=t1;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:14: error: 't1' was not declared in this scope; did you mean 'y1'?
   14 |         cin>>t1;
      |              ^~
      |              y1
a.cc:15:21: error: 'l' was not declared in this scope
   15 |         if((t1==t)^(l%2==m%2))s=g;
      |                     ^
Language: Java

public class AssignD {
    private static final int MOD = 1_000_000_007;
    private static final String YES = "Yes";
    private static final String NO = "No";

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
        solve(sc, N);
    }

    private static void solve(Scanner sc, int N) {
        String leftVal, rightVal;

        System.out.println(0);
        leftVal= sc.next();
        if (leftVal.equals("Vacant")) return;

        System.out.println(N/2);
        rightVal = sc.next();
        if (rightVal.equals("Vacant")) return;


        int left = 0;
        int right = N;
        if (leftVal.equals(rightVal)) {
            right = N/2;
        } else {
            leftVal = rightVal;
            left = N/2;
        }

        System.err.println(left + ", " + right);
        while(right - left > 1) {
            int mid = (right+left)/2;
            System.out.println(mid);

            String input = sc.next();
            if (input.equals("Vacant")) {
                return;
            }

            if (input.equals(leftVal)) {
                if (left == mid) break;

                left = mid;
                leftVal = input;
            } else {
                right = mid;
                rightVal = input;
            }
        }

        System.out.println(right%N);
        String input = sc.next();
        if (!input.equals("Vacant")) {
            System.exit(1);
        }
    }
}

Compiler output:
Main.java:1: error: class AssignD is public, should be declared in a file named AssignD.java
public class AssignD {
       ^
Main.java:13: error: cannot find symbol
    private static void solve(Scanner sc, int N) {
                              ^
  symbol:   class Scanner
  location: class AssignD
Main.java:7: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
        ^
  symbol:   class Scanner
  location: class AssignD
Main.java:7: error: cannot find symbol
        Scanner sc = new Scanner(System.in);
                         ^
  symbol:   class Scanner
  location: class AssignD
4 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();
      while(true) {
        int i = sc.nextInt();
        if(i == n - 1) {
          System.out.println("Vacant");
          return;
        }
        if(i % 2 == 0) 
          System.out.println("Male");
        else
          System.out.println("Female");
      }
      System.out.flush();
  }
}

Compiler output:
Main.java:18: error: unreachable statement
      System.out.flush();
      ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
/* typedef */
typedef long long ll;
/* constant */
const int INF = 1 << 30;
const ll LINF = 1LL << 50;
const int NIL = -1;
const int MAX = 10000;
const int mod = 1000000007;
const double pi = 3.141592653589;
/* global variables */
int N;
/* function */
int query(int x) {
    cout << x << endl;
    string ans;
    cin >> ans;
    if (ans=="Vacant")
    exit(0);
    return (ans=="Male");
}

/* main */
int main(){
    cin >> N;
    int head = query(0), tail = query(N-1);
    int cur;
    int left = 0, right = N - 1;
    for (int i = 0; i < 20; i++) {
        int mid = (right + left) / 2;
        cur = query(mid);
        if ((mid - left) % 2 ^ (head == cur) ) {
            right = mid;
            tail = cur;
        }
        else {
            left = mid;
            head = cur;
        }
    }
}
}


Compiler output:
a.cc:43:1: error: expected declaration before '}' token
   43 | }
      | ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n)for(long long i=0;i<(n);i++)
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
const ll INF=1e18;
const int MOD=1e9+7;
const double pi=acos(-1);
int n;
int vec[100010];
void solve(){
  int l=0,r=n;
  cout << 0 << endl;
  string s;
  cin >> s;
  if(s[0]=='V')return;
  if(s[0]=='M')vec[0]=1;
  if(s[0]=='F')vec[0]=2;
  
  while(true){
    int c=(r+l)/2;
    cout << c << endl;
    cin >> t;
    if(t[0]=='V')return;
    if(t[0]=='M')vec[c]=1;
    if(t[0]=='F')vec[c]=2;
    
    if((c-l)%2^vec[c]==vec[l])l=c;
    else r=c;
  }
}
  
int main(){
  cin >> n;
  int t=1;
  while(t--){
    solve();
  }
  return 0;
  
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:23:12: error: 't' was not declared in this scope
   23 |     cin >> t;
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
using P = pair<ll,ll>;
const ll mod = 1e9+7;
#define ALL(x) (x).begin(),(x).end()
#define pow(x,y) modpow(x,y)
#define REP(i,n) for(ll (i)=0;(i)<(n);(i)++)

template <class T = int>T in(){
    T x;
    cin >> x;
    return (x);
}

signed main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout<<fixed<<setprecision(10);
    int N = in();
    vector<int> two = {65536,32768,16384,8192,4096,2048,1024,512,256,128,64,32,16,8,4,2,1};
    int counter = 0;
    cout << 0 << "\n";
    cout.flush()
    string mae = in<string>();
    int now = 0;
    int plus = 1;
    while(1){
        if(mae == "Vacant")break;
        if(two[counter] >= N){
            counter++;
            continue;
        }
        if(plus)if(now + two[counter] >=N){
            counter++;
            continue;
        }
        if(plus){
            now += two[counter];
            cout << now << "\n";
            cout.flush()
        }else{
            now -= two[counter];
            cout << now << "\n";
            cout.flush()
        }
        string cat = in<string>();
        if(cat == "Vacant"){
            break;
        }else if(cat == mae){
            mae = cat;
            plus = 1;
        }else{
            plus = 0;
        }
        counter++;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:17: error: expected ';' before 'string'
   24 |     cout.flush()
      |                 ^
      |                 ;
   25 |     string mae = in<string>();
      |     ~~~~~~       
a.cc:29:12: error: 'mae' was not declared in this scope
   29 |         if(mae == "Vacant")break;
      |            ^~~
a.cc:41:25: error: expected ';' before '}' token
   41 |             cout.flush()
      |                         ^
      |                         ;
   42 |         }else{
      |         ~                
a.cc:45:25: error: expected ';' before '}' token
   45 |             cout.flush()
      |                         ^
      |                         ;
   46 |         }
      |         ~                
a.cc:50:25: error: 'mae' was not declared in this scope
   50 |         }else if(cat == mae){
      |                         ^~~
Language: C++

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define REP(i,a,b) for (int i = a; i < (b); ++i)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define YY cout << "Yes" << endl;
#define NN cout << "No" << endl;
#define ve vector
#define pint pair<int,int>
const int INF = 1000000007;
const long double EPS = 1e-15;
const long double PI = acos(-1);
typedef long long ll;
using namespace std;
using Graph = vector<vector<int>>;
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; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { return (a * b) / gcd(a,b); }
// *max_element(all(d))
int solve(){
  int n;
  cin >> n;
  cout << 0 << endl;
  string f;
  cin >> f;
  int l = 0,r = n;
  if(f!="Vacant")while(1){
    int m = (l + r) / 2;
    cout << m << endl;
    string s;
    cin >> s;
    if(s == "Vacant")break;
    if(m % 2 && s != f || m % 2 == 0 && s == f)l = m + 1;
    else r = m
  }
  return 0; 
}
int main(){
  // ios::sync_with_stdio(false);cin.tie(nullptr);
  cout << fixed;cout << setprecision(16);
  solve();
  return 0;
}

Compiler output:
a.cc: In function 'int solve()':
a.cc:36:15: error: expected ';' before '}' token
   36 |     else r = m
      |               ^
      |               ;
   37 |   }
      |   ~
Language: C++

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define REP(i,a,b) for (int i = a; i < (b); ++i)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define YY cout << "Yes" << endl;
#define NN cout << "No" << endl;
#define ve vector
#define pint pair<int,int>
const int INF = 1000000007;
const long double EPS = 1e-15;
const long double PI = acos(-1);
typedef long long ll;
using namespace std;
using Graph = vector<vector<int>>;
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; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { return (a * b) / gcd(a,b); }
// *max_element(all(d))
int solve(){
  int n;
  cin >> n;
  rep(i,20){
    cout << rand() % n + 1 << endl;
    string s;
    cin >> s;
    if(s == "Vacant"){
      return;
    }
  }
  return 0; 
}
int main(){
  // ios::sync_with_stdio(false);cin.tie(nullptr);
  cout << fixed;cout << setprecision(16);
  solve();
  return 0;
}

Compiler output:
a.cc: In function 'int solve()':
a.cc:30:7: error: return-statement with no value, in function returning 'int' [-fpermissive]
   30 |       return;
      |       ^~~~~~
Language: C++

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


using namespace std;

using ll = long long;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

int anser(string s) {
	if (s == "Male") {
		return 0;
	}
	if (s == "Female") {
		return 1;
	}
	if (s == "Vacant") {
		exit(0);
	}
	exit(-1);
}

int query(int p) {
	cout << p << endl;
	string s;
	cin >> s;
	return anser(s);

}



bool bingo(int d, int v1, int v2) {
	if (d % 2 == 0) {
		return v1 != v2;
	} else {
		return v1 == v2;
	}
}

int main() {
	int n;
	cin >> n;
	int from = 0;
	int to = n - 1;

	int from_q = query(from);
	int to_q = query(to);

	while(true) {
		int mid = from + (to - from) / 2;
		int mid_q = query(mid);

		if (bingo(r1 - from,from_q, mid_q)) {
			to = mid;
			to_q = mid_q;
		} else if (bingo(to - mid, mid_q, to_q)) {
			from = mid;
			from_q = mid_q;
		} else {
			int a[0];
			a[-10000000] = 0;
		}
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:64:27: error: 'r1' was not declared in this scope; did you mean 'y1'?
   64 |                 if (bingo(r1 - from,from_q, mid_q)) {
      |                           ^~
      |                           y1
Language: C++

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


using namespace std;

using ll = long long;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

int anser(string s) {
	if (s == "Male") {
		return 0;
	}
	if (s == "Female") {
		return 1;
	}
	if (s == "Vacant") {
		exit(0);
	}
	exit(-1);
}

int query(int p) {
	cout << p << endl;
	string s;
	cin >> s;
	return anser(s);

}



bool bingo(int d, int v1, int v2) {
	if (d % 2 == 0) {
		return v1 != v2;
	} else {
		return v1 == v2;
	}
}

int main() {
	int n;
	cin >> n;
	int from = 0;
	int to = n - 1;

	int from_ans = query(from);
	int to_ans = query(to);

	while(true) {
		int r1 = from + (to - from) / 3;
		int r2 = from + (to - from) * 2) / 3;
		int r1_ans = query(r1);
		int r2_ans = query(r2);

		if (bingo(r1 - from,from_ans, r1_ans)) {
			to = r1;
			to_ans = r1_ans;
		} else if (bingo(r2 - r1, r1_ans, r2_ans)) {
			from = r1;
			to = r2;
			from_ans = r1_ans;
			to_ans = r2_ans;
		} else if (bingo(to - r2, r2_ans, to_ans)) {
			from = r2;
			from_ans = r2_ans;
		} else {
			int a[0];
			a[-10000000] = 0;
		}
	}

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:62:48: error: expected ',' or ';' before ')' token
   62 |                 int r2 = from + (to - from) * 2) / 3;
      |                                                ^
Language: C++

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

using namespace std;

#define INF 1e9
#define MAXN 100005
#define MAXM 100005
#define ll long long
#define vi vector<int>
#define vll vector<long long>
#define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define pii pair<int, int>

string S;
int N, k, id;
pii l, r, mid;

int readRes(string S){
    if(S == "Male"){
        return 0;
    } else if(S == "Female"){
        return 1;
    } else {
        exit(1);
    }
}

bool isLeft(){
    if(mid.first % 2 != 0){
        return l.second != mid.second;
    } else {
        return l.second == mid.second;
    }
}

void solve(){
 
    rep(i, k){
        if(l.first + 1 == r.first)
            id = 
        else
            id = (l.first + r.first)/2;
        cout << id << endl;
        cin >> S;
        mid = make_pair(id, readRes(S));

        if(isLeft()){
            l = mid;
        } else {
            r = mid;
        }        
        // cout << "(" << l.first << ", " << r.first << ")"<< endl;
        
        }
    }

int main(){
    cin >> N;
    k = 20;
    
    cout << 0 << endl;
    cin >> S;
    l = make_pair(0, readRes(S));

    cout << N-1 << endl;
    cin >> S;
    r = make_pair(N-1, readRes(S));

    k -= 2;

    solve();
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:45:9: error: expected primary-expression before 'else'
   45 |         else
      |         ^~~~
Language: C++

#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
typedef long long ll;


int main(void){
  int n,l,r,k,al,ar;
  string s;
  
  cin >> n;
  
  cout << 0 << endl;
  cin >> s;
  if (s=="Vacant") return 0;
  if (s=="Male") al=ar=0;
  else al=ar=1;
  
  l=0;
  r=n;
  while (r-l>1){
    mid=(l+r)/2;
    cout << mid << endl;
    cin >> s;
    if (s=="Vacant") return 0;
    if (s=="Male") k=0;
    else k=1;
    
    if ((al+k)%2==0 && (mid-l)%2==1){
      r=mid;
      ar=k;
    }else{
      l=mid;
      al=k;
    }
  }
  
  cout << l << endl;
  cin >> s;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:5: error: 'mid' was not declared in this scope
   23 |     mid=(l+r)/2;
      |     ^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long N;cin>>N;
  cout<<0<<endl;cout<<flush;
  string p;cin>>p;if(p=="Vacant")return 0;
  cout<<N/2<<endl;cout<<flush;
  string q;cin>>q;if(q=="Vacant")return 0;
  long l,r;
  string a,b;
  if(((N/2)%2==0&&p!=q)||((N/2)%2==1&&p==q)){l=0;r=N/2;a=p,b=q;}
  else {l=N/2+1;r=N;a=q,b=p;}
  while(1){
    long z=(l+r)/2;cout<<z<<endl;cout<<flush;
    string c;cin>>c;if(c=="Vacant")return 0;
    if(((z-l)%2==0&&a!=c)||((z-l)%2==1&&a==c)){r=z;b=c;}
    else if((r-z)%2==0&&b!=c)||((r-z)%2==1&&b==c){l=z;a=c;}
    else assert(0);
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:30: error: expected primary-expression before '||' token
   17 |     else if((r-z)%2==0&&b!=c)||((r-z)%2==1&&b==c){l=z;a=c;}
      |                              ^~
Language: C++

/*"""
Nは奇数
N<=99999, 20回まで聞ける

まず一番上を聞く



0 1 2 3 4
空席は少なくとも1つある
FVFみたいな状況は検出しようがないのですてる
2分探索しかない

常に奇数になってくれるか: なってくれない



"""*/
#include<bits/stdc++.h>
using namespace std;
int main(){
  long N;cin>>N;
  string p;cin>>p;if(p=="Vacant")return 0;
  cout<<N/2<<endl;cout<<flush;
  string q;cin>>q;if(q=="Vacant")return 0;
  long l,r;
  if(((N/2)%2==0&&p!=q)||((N/2)%2==1&&p==q)){l=0;r=N/2;string a=p,b=q;}
  else {l=N/2+1;r=N;string a=q,b=p;}
  while(r-l>0){
    long z=(l+r)/2;string c;cin>>c;if(c=="Vacant")return 0;
    if(((z-l)%2==0&&a!=c)||((z-l)%2==1&&a==c)){r=z;b=c;}
    else {l=z;a=c;}
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:31:21: error: 'a' was not declared in this scope
   31 |     if(((z-l)%2==0&&a!=c)||((z-l)%2==1&&a==c)){r=z;b=c;}
      |                     ^
a.cc:31:52: error: 'b' was not declared in this scope
   31 |     if(((z-l)%2==0&&a!=c)||((z-l)%2==1&&a==c)){r=z;b=c;}
      |                                                    ^
Language: C++

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <algorithm>
#include <cctype>
#include <cmath>
#include <queue>
#include <map>
#include <numeric>
#include <unordered_map>
#include <iomanip>
#include <functional>
#include <bitset>
#include <complex>
#include <stack>
#include <cstdint>



#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
#define rrep(i, n) for(ll i = (ll)(n-1); i >= 0; i--)
#define repi(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)
#define rrepi(i,a,b) for(ll i=(ll)(b-1);i>=(ll)(a);i--)

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

template<class T>inline bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>inline bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

typedef long long ll;

using namespace std;


int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  ll n;
  cin>>n;
  cout<<0<<endl;
  string s;
  cin>>s;
  ll l=0,r=0;
  if(s=="Female")l=1;
  if(s=="Vacant"){
    return 0;
  }

  cout<<n-1<<endl;
  cin>>s;
  if(s=="Female")r=1;
  if(s=="Vacant")return 0;
  ll ll=0,rr=n-1;
  while(rr-ll>1){
    ll mid=(ll+rr)/2;
    cout<<mid;
    cin>>s;
    ll f=0;
    if(s=="Vacant")return 0;
    if(s=="Female")f=1;
    if(mid%2)f^=1;
    if(f==l)ll=mid;
    else rr=mid;
  }
  return 0;

}


Compiler output:
a.cc: In function 'int main()':
a.cc:57:7: error: expected ';' before 'mid'
   57 |     ll mid=(ll+rr)/2;
      |       ^~~~
      |       ;
a.cc:58:11: error: 'mid' was not declared in this scope
   58 |     cout<<mid;
      |           ^~~
a.cc:60:7: error: expected ';' before 'f'
   60 |     ll f=0;
      |       ^~
      |       ;
a.cc:62:20: error: 'f' was not declared in this scope
   62 |     if(s=="Female")f=1;
      |                    ^
a.cc:63:14: error: 'f' was not declared in this scope
   63 |     if(mid%2)f^=1;
      |              ^
a.cc:64:8: error: 'f' was not declared in this scope
   64 |     if(f==l)ll=mid;
      |        ^
Language: C++

N = int(input())

def f(n):
    print(n)
    S = input()
    if S == 'Vacant':
        exit()
    return S

l = 0
r = N - 1
S = f(l)
U = f(r)
for i in range(20):
    mid = (l + r) // 2
    U = f(mid)
    len = m - l + 1
    if ((len % 2) ^ (S == U)):
        r = mid
        S = U
    else:
        l = mid


Compiler output:
a.cc:6:13: warning: multi-character literal with 6 characters exceeds 'int' size of 4 bytes
    6 |     if S == 'Vacant':
      |             ^~~~~~~~
a.cc:1:1: error: 'N' does not name a type
    1 | N = int(input())
      | ^
Language: C++

int main(){
    ll n;
    cin >> n;
    ll l = 0, r = n;
 
    cout << l << endl;
    string t, u = " ";
    cin >> t;
    if (t == "Vacant") exit;
    else u = t;
 
    while (r - l  > 1){
        ll y = (l + r) / 2;
        cout << y << endl;
        string s;
        cin >> s;
        if (s == "Vacant") break;
        else{
            if (((y - l + 1) % 2 == 0 && u != s) || ((y - l + 1) % 2 != 0 && u == s)){
                l = y;
                u = s;
            }
            else r = y;
        }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:5: error: 'll' was not declared in this scope
    2 |     ll n;
      |     ^~
a.cc:3:5: error: 'cin' was not declared in this scope
    3 |     cin >> n;
      |     ^~~
a.cc:3:12: error: 'n' was not declared in this scope
    3 |     cin >> n;
      |            ^
a.cc:4:7: error: expected ';' before 'l'
    4 |     ll l = 0, r = n;
      |       ^~
      |       ;
a.cc:6:5: error: 'cout' was not declared in this scope
    6 |     cout << l << endl;
      |     ^~~~
a.cc:6:13: error: 'l' was not declared in this scope
    6 |     cout << l << endl;
      |             ^
a.cc:6:18: error: 'endl' was not declared in this scope
    6 |     cout << l << endl;
      |                  ^~~~
a.cc:7:5: error: 'string' was not declared in this scope
    7 |     string t, u = " ";
      |     ^~~~~~
a.cc:8:12: error: 't' was not declared in this scope
    8 |     cin >> t;
      |            ^
a.cc:9:24: error: 'exit' was not declared in this scope
    9 |     if (t == "Vacant") exit;
      |                        ^~~~
a.cc:1:1: note: 'exit' is defined in header '<cstdlib>'; this is probably fixable by adding '#include <cstdlib>'
  +++ |+#include <cstdlib>
    1 | int main(){
a.cc:10:10: error: 'u' was not declared in this scope
   10 |     else u = t;
      |          ^
a.cc:12:12: error: 'r' was not declared in this scope
   12 |     while (r - l  > 1){
      |            ^
a.cc:13:11: error: expected ';' before 'y'
   13 |         ll y = (l + r) / 2;
      |           ^~
      |           ;
a.cc:14:17: error: 'y' was not declared in this scope
   14 |         cout << y << endl;
      |                 ^
a.cc:15:15: error: expected ';' before 's'
   15 |         string s;
      |               ^~
      |               ;
a.cc:16:16: error: 's' was not declared in this scope
   16 |         cin >> s;
      |                ^
a.cc:19:42: error: 'u' was not declared in this scope
   19 |             if (((y - l + 1) % 2 == 0 && u != s) || ((y - l + 1) % 2 != 0 && u == s)){
      |                                          ^
Language: C++

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

int main(){
  int n;
  cin >> n;
  int r=n,l=0;
  string t,u,m2;
  cout << 0 << endl;
  cin >> t;
  if("Vacant" ==t){return 0;}
  u=t;
  
  while(r-l>1){
    int y=(l+r)/2;
    cout << y << endl;
    string s;
    cin >> s;
    if("Vacant" ==s){return 0;}
    if(((y-l+1)%2==0 && u!=s)) && ((y - l + 1) % 2 != 0 && u == s)){
      l=y;
      u=s;
    }else {r=y;}
}
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:35: error: expected identifier before '(' token
   20 |     if(((y-l+1)%2==0 && u!=s)) && ((y - l + 1) % 2 != 0 && u == s)){
      |                                   ^
Language: C++

#include <bits/stdc++.h>

using namespace std;
using ll =long long;
#define SORT(a) sort((a).begin(),(a).end())
#define rSORT(a) reverse((a).begin(),(a).end())
#define For(i, a, b)    for(int i = (a) ; i < (b) ; ++i)
#define rep(i, n)       For(i, 0, n)
#define debug(x)  cerr << #x << " = " << (x) << endl;
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; }
void coY() {cout <<"Yes"<<endl;}
void coN(){cout <<"No"<<endl;}
const ll INF = 1LL << 60;
const int mod = 1e9+7;
//Write From this Line

int main()
{
	int n; 
	cin >> n; 
	int left = 0 ;
	int right = n ;
	cout << 0 << endl;
	string bef ;
	cin >> bef ;
	if(bef == "Vacant") {
		cout << endl;
		return 0 ;
	}
	int bef_num = 0 ;
	int i = 0; 
	while(right - left > 1){
		int c = (left + right ) / 2; 
		cout << c << endl;
		string s ;
		cin >> s ;
		if(s=="Vacant"){
		cout << endl;
			return 0 ;
		}
		int diff = abs(bef_num - c);
		if(diff % 2 == 0){
			if(s==bef){
				left = c ;
			} else {
				right = c;
			}
		} else {
			if(s == bef){
				right = c;
			} else {
				left = c;
			}
		}
		bef_num = c;
		bef = s;
		i ++ ;
	}
	cout << left << endl;
	cin >> s ;
	if(s=="Vacant"){
		cout << endl;
		return 0 ;
	}
	cout << right << endl;
	cin >> s;
	if(s=="Vacant"){
		cout << endl;
		return 0 ;
	}

}


Compiler output:
a.cc: In function 'int main()':
a.cc:61:16: error: 's' was not declared in this scope
   61 |         cin >> s ;
      |                ^
Language: C++

#include <bits/stdc++.h>

using namespace std;
using ll =long long;
#define SORT(a) sort((a).begin(),(a).end())
#define rSORT(a) reverse((a).begin(),(a).end())
#define For(i, a, b)    for(int i = (a) ; i < (b) ; ++i)
#define rep(i, n)       For(i, 0, n)
#define debug(x)  cerr << #x << " = " << (x) << endl;
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; }
void coY() {cout <<"Yes"<<endl;}
void coN(){cout <<"No"<<endl;}
const ll INF = 1LL << 60;
const int mod = 1e9+7;
//Write From this Line

int main()
{
	int n; 
	cin >> n; 
	int left = 0 ;
	int right = n ;
	cout << 0 << endl;
	string bef ;
	cin >> bef ;
	if(bef == "Vacant") {
		return 0 ;
	}
	int bef_num = 0 ;
	int i = 0; 
	while(r - l > 1){
		int c = (left + right ) / 2; 
		cout << c << endl;
		string s ;
		cin >> s ;
		if(s=="Vacant"){
			return 0 ;
		}
		int diff = abs(bef_num - c);
		if(diff % 2 == 0){
			if(s==bef){
				left = c ;
			} else {
				right = c;
			}
		} else {
			if(s == bef){
				right = c;
			} else {
				left = c;
			}
		}
		bef_num = c;
		bef = s;
		i ++ ;
	}
	cout << l << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:32:15: error: 'r' was not declared in this scope
   32 |         while(r - l > 1){
      |               ^
a.cc:32:19: error: 'l' was not declared in this scope
   32 |         while(r - l > 1){
      |                   ^
a.cc:58:17: error: 'l' was not declared in this scope
   58 |         cout << l << endl;
      |                 ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  vector<string> s(n);
  int n;cin >> n;
  cout << 0 << endl;
  cin >> s[0];
  if(s[0]=="Vacant"){
    return 0;
  }
  cout << n-1 << endl;
  cin >> s[n-1];
  if(s[n-1]=="Vacant"){
    return 0;
  }
  int l=0,r=n-1;
  for(int i=0;i<16;i++){
    int mid=(l>r)/2;
    cout << mid << endl;
    cin >> s[mid];
    if(s[mid]=="Vacant"){
      return 0;
    }
    if((s[l]==s[mid])^((mid-l)%2==1)){
      r=mid;
    }
    else{
      l=mid;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:20: error: 'n' was not declared in this scope
    4 |   vector<string> s(n);
      |                    ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef vector<ll> vl;
typedef pair<ll, ll> PP;
#define rep(i, n) for(ll i = 0; i < ll(n); i++)
#define all(v) v.begin(), v.end()
#define inputv(v, n)                                                           \
    vl v;                                                                      \
    rep(i, n) {                                                                \
        ll x;                                                                  \
        cin >> x;                                                              \
        v.push_back(x);                                                        \
    }
bool chmin(ll& a, ll& b) { if (b < a) { a = b; return 1; } return 0; }
bool chmax(ll& a, ll& b) { if (b > a) { a = b; return 1; } return 0; }
const ll INF = 999999999999999;
const ll MOD = 1000000007;
const ll MAX_N = 500010;
ll a, b, c, d, e, f, p, t, x, y, z, q, m, n, r, h, k, w, l, ans;
int main(){
    string S;
    cin >> n;
    r = n - 1;
    l = 0;
    cout << r << endl;
    fflush();
    cin >> S;
    if (S[0] == 'V')return 0;
    cout << l << endl;
    fflush();
    cin >> S;
    if (S[0] == 'V')return 0;
    S1 = S;
    t = 0;
    while (1) {
        x = (l + r) / 2;
        cout << x << endl;
        fflush();
        cin >> S;
        if (S[0] == 'V')return 0;
        if (((x - l) % 2 == 0) ^ (S[0] == S1[0])) {
            r = x;
            S1 = S;
        }
        else l = x;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:11: error: too few arguments to function 'int fflush(FILE*)'
   27 |     fflush();
      |     ~~~~~~^~
In file included from /usr/include/c++/14/cstdio:42,
                 from /usr/include/c++/14/ext/string_conversions.h:45,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~
a.cc:31:11: error: too few arguments to function 'int fflush(FILE*)'
   31 |     fflush();
      |     ~~~~~~^~
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~
a.cc:34:5: error: 'S1' was not declared in this scope; did you mean 'S'?
   34 |     S1 = S;
      |     ^~
      |     S
a.cc:39:15: error: too few arguments to function 'int fflush(FILE*)'
   39 |         fflush();
      |         ~~~~~~^~
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef vector<ll> vl;
typedef pair<ll, ll> PP;
#define rep(i, n) for(ll i = 0; i < ll(n); i++)
#define all(v) v.begin(), v.end()
#define inputv(v, n)                                                           \
    vl v;                                                                      \
    rep(i, n) {                                                                \
        ll x;                                                                  \
        cin >> x;                                                              \
        v.push_back(x);                                                        \
    }
bool chmin(ll& a, ll& b) { if (b < a) { a = b; return 1; } return 0; }
bool chmax(ll& a, ll& b) { if (b > a) { a = b; return 1; } return 0; }
const ll INF = 999999999999999;
const ll MOD = 1000000007;
const ll MAX_N = 500010;
ll a, b, c, d, e, f, p, t, x, y, z, q, m, n, r, h, k, w, l, ans;
int main(){
    string S,S1;
    cin >> n;
    r = n - 1;
    l = 0;
    cout << r << endl;
    flush();
    cin >> S;
    if (S[0] == 'V')return 0;
    cout << l << endl;
    flush();
    cin >> S;
    if (S[0] == 'V')return 0;
    S1 = S;
    t = 0;
    while (1) {
        x = (l + r) / 2;
        cout << x << endl;
        flush();
        cin >> S;
        if (S[0] == 'V')return 0;
        if (((x - l) % 2 == 0) ^ (S[0] == S1[0]))r = x;
        else l = x;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:10: error: no matching function for call to 'flush()'
   27 |     flush();
      |     ~~~~~^~
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/ostream:766:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::flush(basic_ostream<_CharT, _Traits>&)'
  766 |     flush(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~~
/usr/include/c++/14/ostream:766:5: note:   candidate expects 1 argument, 0 provided
a.cc:31:10: error: no matching function for call to 'flush()'
   31 |     flush();
      |     ~~~~~^~
/usr/include/c++/14/ostream:766:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::flush(basic_ostream<_CharT, _Traits>&)'
  766 |     flush(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~~
/usr/include/c++/14/ostream:766:5: note:   candidate expects 1 argument, 0 provided
a.cc:39:14: error: no matching function for call to 'flush()'
   39 |         flush();
      |         ~~~~~^~
/usr/include/c++/14/ostream:766:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::flush(basic_ostream<_CharT, _Traits>&)'
  766 |     flush(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~~
/usr/include/c++/14/ostream:766:5: note:   candidate expects 1 argument, 0 provided
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef vector<ll> vl;
typedef pair<ll, ll> PP;
#define rep(i, n) for(ll i = 0; i < ll(n); i++)
#define all(v) v.begin(), v.end()
#define inputv(v, n)                                                           \
    vl v;                                                                      \
    rep(i, n) {                                                                \
        ll x;                                                                  \
        cin >> x;                                                              \
        v.push_back(x);                                                        \
    }
bool chmin(ll& a, ll& b) { if (b < a) { a = b; return 1; } return 0; }
bool chmax(ll& a, ll& b) { if (b > a) { a = b; return 1; } return 0; }
const ll INF = 999999999999999;
const ll MOD = 1000000007;
const ll MAX_N = 500010;
ll a, b, c, d, e, f, p, t, x, y, z, q, m, n, r, h, k, w, l, ans;
int main(){
    string S;
    cin >> n;
    r = n - 1;
    l = 0;
    cout << r << endl;
    fflush();
    cin >> S;
    if (S[0] == 'V')return 0;
    cout << l << endl;
    fflush();
    cin >> S;
    if (S[0] == 'V')return 0;
    S1 = S;
    t = 0;
    while (1) {
        x = (l + r) / 2;
        cout << x << endl;
        fflush();
        cin >> S;
        if (S[0] == 'V')return 0;
        if (((x - l) % 2 == 0) ^ (S[0] == S1[0]))r = x;
        else l = x;
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:11: error: too few arguments to function 'int fflush(FILE*)'
   27 |     fflush();
      |     ~~~~~~^~
In file included from /usr/include/c++/14/cstdio:42,
                 from /usr/include/c++/14/ext/string_conversions.h:45,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~
a.cc:31:11: error: too few arguments to function 'int fflush(FILE*)'
   31 |     fflush();
      |     ~~~~~~^~
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~
a.cc:34:5: error: 'S1' was not declared in this scope; did you mean 'S'?
   34 |     S1 = S;
      |     ^~
      |     S
a.cc:39:15: error: too few arguments to function 'int fflush(FILE*)'
   39 |         fflush();
      |         ~~~~~~^~
/usr/include/stdio.h:236:12: note: declared here
  236 | extern int fflush (FILE *__stream);
      |            ^~~~~~