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Submission #71746

# Submission time Handle Problem Language Result Execution time Memory
71746 2018-08-25T14:05:27 Z chobo(#2238, andy627) Angelic Hourglass (FXCUP3_hourglass) C++
100 / 100
 3 ms 624 KB 
#include <stdio.h>
#include <queue>
#include <algorithm>
using namespace std;

int ans[5555];
priority_queue<int> pq;

int main(){
    int n;

    scanf("%d",&n);

    if(n==7){
        printf("4");
        return 0;
    }

    for(int i=1;i<=5000;i++) ans[i]=-1;
    pq.push(0);
    while(!pq.empty()){
        int p=pq.top(); pq.pop();

        if(ans[p+3]==-1 || ans[p+3]>ans[p]+1) ans[p+3]=ans[p]+1,pq.push(p+3);
        if(ans[p+5]==-1 || ans[p+5]>ans[p]+1) ans[p+5]=ans[p]+1,pq.push(p+5);
    }

    printf("%d",ans[n]);

    return 0;
}

Compilation message

hourglass.cpp: In function 'int main()':
hourglass.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 380 KB Output is correct
2 Correct 3 ms 412 KB Output is correct
3 Correct 3 ms 380 KB Output is correct
4 Correct 3 ms 460 KB Output is correct
5 Correct 3 ms 412 KB Output is correct

Subtask #2
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 620 KB Output is correct
2 Correct 3 ms 588 KB Output is correct
3 Correct 3 ms 588 KB Output is correct
4 Correct 2 ms 616 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 2 ms 588 KB Output is correct
7 Correct 3 ms 616 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 3 ms 620 KB Output is correct
10 Correct 3 ms 620 KB Output is correct
11 Correct 3 ms 616 KB Output is correct
12 Correct 3 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 3 ms 620 KB Output is correct
15 Correct 3 ms 616 KB Output is correct
16 Correct 3 ms 588 KB Output is correct
17 Correct 2 ms 588 KB Output is correct
18 Correct 2 ms 620 KB Output is correct

Subtask #3
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 624 KB Output is correct
2 Correct 3 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 624 KB Output is correct
6 Correct 3 ms 624 KB Output is correct
7 Correct 2 ms 624 KB Output is correct
8 Correct 3 ms 624 KB Output is correct
9 Correct 2 ms 620 KB Output is correct
10 Correct 3 ms 620 KB Output is correct
11 Correct 3 ms 624 KB Output is correct
12 Correct 3 ms 620 KB Output is correct