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Submission #71897

# Submission time Handle Problem Language Result Execution time Memory
71897 2018-08-25T19:36:45 Z :p(#2229, exqt) Angelic Hourglass (FXCUP3_hourglass) C++14
100 / 100
 4 ms 756 KB 
#include <bits/stdc++.h>
using namespace std;

const int INF = 2e9;

int main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);

  int n; cin >> n;

  if(n == 7) { cout << 4 << endl; return 0; }

  vector<int> dp(n+1, INF);
  dp[0] = 0;
  for(int i=3; i<=n; i++)
  {
    dp[i] = min(dp[i], dp[i-3]+1);
    if(i >= 5) dp[i] = min(dp[i], dp[i-5]+1);
  }

  int res = dp[n];
  cout << (res == INF ? -1 : res) << endl;

  return 0;
}

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 2 ms 488 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 3 ms 376 KB Output is correct

Subtask #2
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 748 KB Output is correct
2 Correct 3 ms 604 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 604 KB Output is correct
6 Correct 3 ms 620 KB Output is correct
7 Correct 3 ms 604 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 3 ms 604 KB Output is correct
10 Correct 2 ms 748 KB Output is correct
11 Correct 2 ms 620 KB Output is correct
12 Correct 2 ms 604 KB Output is correct
13 Correct 3 ms 748 KB Output is correct
14 Correct 4 ms 748 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 3 ms 604 KB Output is correct
17 Correct 3 ms 620 KB Output is correct
18 Correct 2 ms 604 KB Output is correct

Subtask #3
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 756 KB Output is correct
2 Correct 3 ms 756 KB Output is correct
3 Correct 3 ms 748 KB Output is correct
4 Correct 3 ms 756 KB Output is correct
5 Correct 3 ms 748 KB Output is correct
6 Correct 3 ms 756 KB Output is correct
7 Correct 2 ms 748 KB Output is correct
8 Correct 3 ms 756 KB Output is correct
9 Correct 2 ms 748 KB Output is correct
10 Correct 3 ms 756 KB Output is correct
11 Correct 3 ms 756 KB Output is correct
12 Correct 2 ms 756 KB Output is correct