Submission #164473

#	Time	Username	Problem	Language	Result	Execution time	Memory
164473		mhy908	Carnival (CEOI14_carnival)	C++14	100 / 100	26 ms	380 KiB

carnival

#include <bits/stdc++.h>
int query(int a, int b){
    printf("%d ", b-a+1);
    for(int i=a; i<=b; i++)printf("%d ", i);
    fflush(stdout);
    int ret;
    scanf("%d", &ret);
    return ret;
}
int n, col[160], r, sum[160];
int main()
{
    scanf("%d", &n);
    col[1]=sum[1]=++r;
    for(int i=2; i<=n; i++){
        sum[i]=query(1, i);
        if(sum[i-1]+1==sum[i]){
            col[i]=++r;
            continue;
        }
        else{
            int s=1, e=i-1;
            while(s<e){
                int mid=(s+e)/2+1;
                if(query(mid, i)==query(mid, i-1)+1)e=mid-1;
                else s=mid;
            }
            col[i]=col[s];
        }
    }
    for(int i=0; i<=n; i++)printf("%d ", col[i]);
}

Compilation message (stderr)

carnival.cpp: In function 'int query(int, int)':
carnival.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &ret);
     ~~~~~^~~~~~~~~~~~
carnival.cpp: In function 'int main()':
carnival.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20