Submission #71669

#	Time	Username	Problem	Language	Result	Execution time	Memory
71669		team (#119)	Angelic Hourglass (FXCUP3_hourglass)	C++98	100 / 100	3 ms	624 KiB

hourglass

#include <bits/stdc++.h>
#define INF 100000000
using namespace std;
int main(){
    int n;scanf("%d",&n);
    int ans=INF;
    int i=0;
    while(1){
        if((5*i)>n) break;
        if(!((n-5*i)%3)){
            ans=min(ans,i+(n-5*i)/3);
        }
        i++;
    }
    i=0;
     while(1){
        if((5*i)>n-7) break;
        if(!((n-7-5*i)%3)){
            ans=min(ans,i+(n-7-5*i)/3+4);
        }
        i++;
    }
    if(ans>=INF) ans=-1;
    printf("%d\n",ans);
    return 0;
}

Compilation message (stderr)

hourglass.cpp: In function 'int main()':
hourglass.cpp:5:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int n;scanf("%d",&n);
           ~~~~~^~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 42 / 42
• Subtask 3: 41 / 41