Submission #244444

#	Time	Username	Problem	Language	Result	Execution time	Memory
244444		dwsc	Calvinball championship (CEOI15_teams)	C++14	100 / 100	732 ms	888 KiB

teams

#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 (stderr)

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

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10