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Submission #166536

# Submission time Handle Problem Language Result Execution time Memory
166536 2019-12-02T17:46:50 Z luciocf Calvinball championship (CEOI15_teams) C++14
20 / 100
 153 ms 65540 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e4+10;
const int mod = 1e9+7;

int n;
int a[maxn];

int dp[maxn][maxn];
int pref[maxn][maxn];

int main(void)
{
    scanf("%d", &n);

    for (int i = 1; i <= n; i++)
        scanf("%d", &a[i]);

    for (int i = 1; i <= n; i++)
        dp[1][i] = 1;

    for (int i = 2; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            dp[i][j] = (1ll*j*dp[i-1][j])%mod;
            dp[i][j] = (dp[i][j] + dp[i-1][j+1])%mod;
        }
    }

    int ans = 0, mx = 0;

    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j < a[i]; j++)
            ans = (ans + dp[n-i+1][max(mx, j)])%mod;

        mx = max(mx, a[i]);
    }

    printf("%d\n", ans+1);
}

Compilation message

teams.cpp: In function 'int main()':
teams.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
teams.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 296 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 760 KB Output isn't correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 760 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 3320 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 8312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 153 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 114 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 126 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -