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Submission #527147

# Submission time Handle Problem Language Result Execution time Memory
527147 2022-02-17T02:44:24 Z joelau Calvinball championship (CEOI15_teams) C++14
50 / 100
 1 ms 844 KB 
#include <bits/stdc++.h>
using namespace std;

long long N, A[105], dp[1005][1005], p = 1000007;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin >> N;
    for (long long i = 1; i <= N; ++i) cin >> A[i];
    for (long long i = 1; i <= N; ++i) dp[N+1][i] = 1;
    for (long long i = N; i > 0; --i) for (long long j = 1; j <= N; ++j) dp[i][j] = (dp[i+1][j] * j + dp[i+1][j+1]) % p;
    long long ans = 1, most = 0;
    for (long long i = 1; i <= N; ++i) {
        ans = (ans + dp[i+1][most] * min(most,A[i]-1)) % p;
        for (long long j = most+1; j < A[i]; ++j) ans = (ans + dp[i+1][j]) % p;
        most = max(most,A[i]);
    }
    cout << ans;

    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 312 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 304 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 320 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 708 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 844 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 324 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -