Submission #1360801

#	Time	Username	Problem	Language	Result	Execution time	Memory
1360801		yyc000123	Dark Ride (EGOI25_darkride)	C++20	Compilation error	0 ms	0 KiB

Main

#include<bits/stdc++.h>
using namespace std ;
const int N = 3e4+5 ;
int n , arr[N] , ans[2] ;
vector<int> v[2] ;

bool query(int t , int le , int ri){
    string s = "" ;
    for(int i=0 ; i<n ; i++) s+='0' ;
    for(int i=le ; i<=ri ; i++) s[v[t][i]]='1' ;
    cout << "? " << s << endl ;
    int k ; cin >> k ;
    return (k&1) ;
}

bool random(){
    v[0].clear() ; v[1].clear() ;
    srand(time(0)) ;
    for(int i=0 ; i<n ; i++){
        v[rand()%2].push_back(i) ;
    }
    return query(0,0,v[0].size()-1) ;
}

void f(int t , int le , int ri){
    if(le==ri){ ans[t]=v[t][le] ; return ; }
    else if(ri-le==1){
        bool temp = query(t,le,le) ;
        if(temp) ans[t]=v[t][le] ;
        else ans[t]=v[t][ri] ;
        return ;
    }
    int mi = (le+ri)/2 ;
    bool temp = query(t,le,mi) ;
    if(temp) f(t,le,mi) ;
    else f(t,mi+1,ri) ;
}

int main(){
    cin >> n ;
    while(!random()) ;
    f(0,0,v[0].size()-1) ; f(1,0,v[1].size()-1) ;
    cout << "! " << ans[0] << ' ' << ans[1] << endl ;
    return 0 ;
}

Compilation message (stderr)

Main.cpp:16:6: error: ambiguating new declaration of 'bool random()'
   16 | bool random(){
      |      ^~~~~~
In file included from /usr/include/c++/13/cstdlib:79,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:42,
                 from Main.cpp:1:
/usr/include/stdlib.h:521:17: note: old declaration 'long int random()'
  521 | extern long int random (void) __THROW;
      |                 ^~~~~~