Submission #357668

#	Time	Username	Problem	Language	Result	Execution time	Memory
357668		urd05	Colors (BOI20_colors)	C++14	9 / 100	2 ms	364 KiB

Colors

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

int main(void) {
    long long n;
    scanf("%lld",&n);
    long long l=2;
    long long r=n;
    long long now=1;
    printf("? %lld\n",now);
    fflush(stdout);
    int got;
    scanf("%d",&got);
    long long ret=1;
    for(int i=n-1;i>0;i--) {
        if (now==l-1) {
            now=r;
            r--;
        }
        else {
            now=l;
            l++;
        }
        printf("? %lld\n",now);
        fflush(stdout);
        scanf("%d",&got);
        if (got==0) {
            ret=i+1;
            break;
        }
    }
    printf("= %lld\n",ret);
    fflush(stdout);
}

Compilation message (stderr)

Colors.cpp: In function 'int main()':
Colors.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
Colors.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |     scanf("%d",&got);
      |     ~~~~~^~~~~~~~~~~
Colors.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   26 |         scanf("%d",&got);
      |         ~~~~~^~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33