Submission #472085

#	Time	Username	Problem	Language	Result	Execution time	Memory
472085		nickmet2004	Hidden Sequence (info1cup18_hidden)	C++11	Compilation error	0 ms	0 KiB

hidden

#include<bits/stdc++.h>
#include "grader.h"
using namespace std;
int N , Q;
bool ask(int x , int y , int c){
    vector<int> v;
    while(x--)v.emplace_back(c);
    while(y--)v.emplace_back(c^1);
    return v;
}
vector<int> findSequence(int n){
    int n0 = 0 , n1 = 0;
    for(int i =1; i <= n; ++i){
        if(!ask(i , 0, 0)){
            n0 = i - 1;
            n1 = n - n0;
            break;
        }
        if(!ask(i,0,1)){
            n1 = i - 1;
            n0 = n - n1;
            break;
        }
    }
    int a0 =0 ,b0 =0, a1=n0 , b1 = n1;
    int  q= 0;
    vector<int> ans;
  ans.resize(n);
    for(int i =1; i <= n; ++i){
        if(a0 + b1 <= n/2){
            if(!ask(a0 + 1 , b1 , 0)) q = 1;
            else q = 0;
        } else {
            if(!ask(a1 + 1 , b0 , 1)) q = 0;
            else q = 1;
        }
        if(q){
            a1++;b1--;
            ans.push_back(1);
        }else{
            a0++; b0--;
            ans.push_back(0);
        }
    }
    return ans;
}

Compilation message (stderr)

hidden.cpp: In function 'bool ask(int, int, int)':
hidden.cpp:9:12: error: cannot convert 'std::vector<int>' to 'bool' in return
    9 |     return v;
      |            ^
grader.cpp: In function 'int main()':
grader.cpp:28:26: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   28 |     fprintf (fifo_out, "%d\n", ans.size ());
      |                         ~^     ~~~~~~~~~~~
      |                          |              |
      |                          int            std::vector<int>::size_type {aka long unsigned int}
      |                         %ld
grader.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i=0; i<ans.size () && i < N; i++)
      |                   ~^~~~~~~~~~~~