Submission #156360

#	Time	Username	Problem	Language	Result	Execution time	Memory
156360		Akashi	Calvinball championship (CEOI15_teams)	C++14	100 / 100	288 ms	632 KiB

teams

#include <bits/stdc++.h>
using namespace std;

const int MOD = 1000007;

int n;
int a[10005], Max[10005];
int d[2][10005];

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

    int l = 0, cnt = 1;
    for(int i = 1; i <= n ; ++i) d[0][i] = 1;

    for(int i = n; i >= 1 ; --i){
        for(int j = 1; j <= a[i] - 1 ; ++j){
            cnt += d[l][Max[i - 1]];
            if(cnt >= MOD) cnt -= MOD;
        }

        l = 1 - l;
        for(int j = 1; j <= n ; ++j)
            d[l][j] = (1LL * d[1 - l][j] * j + d[1 - l][j + 1]) % MOD;
    }
    printf("%d", cnt);

    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
teams.cpp:14:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]), Max[i] = max(Max[i - 1], a[i]);
         ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• 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