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Submission #244444

# Submission time Handle Problem Language Result Execution time Memory
244444 2020-07-04T05:59:26 Z dwsc Calvinball championship (CEOI15_teams) C++14
100 / 100
 732 ms 888 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
int MOD = 1e6+7;
int memo[2][10010][2];
int arr[10010];
int n;
main(){
    cin >> n;
    for (int i = 0; i < n; i++){
        int x;
        cin >> x;
        arr[i] = x;
    }
    for (int i = 0; i <= n; i++) memo[n%2][i][0] = memo[n%2][i][1] = 1;
    for (int i = n-1; i >= 0; i--){
        for (int j = 0; j <= i; j++){
            int curnum = arr[i];
            int ans = ((curnum-1)*memo[1-i%2][j][0]);
            ans += memo[1-i%2][max(j,curnum)][1];
            memo[i%2][j][1] = ans%MOD;
            int ans2 = (j*memo[1-i%2][j][0]) + memo[1-i%2][j+1][0];
            memo[i%2][j][0] = ans2%MOD;
        }
    }
    cout << memo[0][0][1];
}

Compilation message

teams.cpp:8:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 5 ms 256 KB Output is correct
6 Correct 5 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 384 KB Output is correct
2 Correct 11 ms 384 KB Output is correct
3 Correct 12 ms 384 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 714 ms 864 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 171 ms 512 KB Output is correct
2 Correct 166 ms 568 KB Output is correct
3 Correct 185 ms 564 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 662 ms 768 KB Output is correct
2 Correct 660 ms 888 KB Output is correct
3 Correct 732 ms 760 KB Output is correct