Submission #44855

#	Time	Username	Problem	Language	Result	Execution time	Memory
44855		bogdan10bos	Calvinball championship (CEOI15_teams)	C++14	70 / 100	214 ms	65536 KiB

teams

#include <bits/stdc++.h>

using namespace std;

//#define FILE_IO

const int mod = 1e6 + 7;

int N;
int v[10005];
int dp[3005][3005];

int main()
{
    #ifdef FILE_IO
    freopen("1.in", "r", stdin);
    freopen("1.out", "w", stdout);
    #endif

    scanf("%d", &N);
    for(int i = 1; i <= N; i++) scanf("%d", &v[i]);

    for(int i = 1; i <= N; i++) dp[1][i] = 1;
    for(int i = 2; i <= N; i++)
        for(int j = 1; j <= N; j++)
            dp[i][j] = (dp[i - 1][j] * j + dp[i - 1][j + 1]) % mod;

    int ans = 1;
    int mx = 0;
    for(int i = 1; i <= N; i++)
    {
        (ans += (1LL * (v[i] - 1) * dp[N - i + 1][mx]) % mod) %= mod;
        mx = max(mx, v[i]);
    }

    printf("%d\n", ans);

    return 0;
}

Compilation message (stderr)

teams.cpp: In function 'int main()':
teams.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
     ~~~~~^~~~~~~~~~
teams.cpp:21:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1; i <= N; i++) scanf("%d", &v[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: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10