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Submission #422740

# Submission time Handle Problem Language Result Execution time Memory
422740 2021-06-10T11:29:27 Z KienTranluvChaeng Calvinball championship (CEOI15_teams) C++17
100 / 100
 527 ms 584 KB 
#include <bits/stdc++.h>
#define mod 1000007

using namespace std;

const int O = 1e4 + 1;

int n, f[2][O], a[O], Max[O];

main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++ i) cin >> a[i], Max[i] = max(Max[i - 1], a[i]);

    int bit = 0;
    for (int i = 0; i <= n; ++ i) f[bit][i] = 1;

    int ans = 1;
    for (int i = n; i >= 1; -- i){
        bit ^= 1;
        for (int j = 1; j <= n; ++ j){
            f[bit][j] = f[bit ^ 1][j + 1] + 1ll * f[bit ^ 1][j] * j % mod;
            f[bit][j] %= mod;
            if (j < a[i]) ans = (ans + f[bit ^ 1][max(Max[i - 1], j)]) % mod;
        }
    }
    cout << ans;
    return 0;
}

Compilation message

teams.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | main(){
      | ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 240 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 324 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 2 ms 316 KB Output is correct

Subtask #7
10.0 / 10.0

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

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 526 ms 496 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 404 KB Output is correct
2 Correct 104 ms 404 KB Output is correct
3 Correct 133 ms 332 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 409 ms 480 KB Output is correct
2 Correct 458 ms 476 KB Output is correct
3 Correct 527 ms 584 KB Output is correct