Submission #546096

#	Time	Username	Problem	Language	Result	Execution time	Memory
546096		CPSC	Calvinball championship (CEOI15_teams)	C++14	20 / 100	105 ms	65536 KiB

teams

# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pii pair <int ,int>
using namespace std;
const int N = 3005, mod = 1e9 + 7;
int dp[N][N],a[N],n,mx,ans;
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>n;
    for (int i = 1; i <= n; i++) {
        cin>>a[i];
    }
    for (int i = 0; i <= n; i++) {
        dp[0][i] = 1;
    }
    for (int i = 1; i <= n; i++) {
        for (int mx = 1; mx <= n; mx++) {
            dp[i][mx] = dp[i - 1][mx]*mx+dp[i - 1][mx + 1];
            dp[i][mx] %= mod;
        }
    }
    mx = 0;
    for (int i = 1; i <= n; i++) {
        ans += ((a[i] - 1)*dp[n - i][mx])%mod; ans %= mod;
        mx = max(mx,a[i]);
    }cout<<ans+1<<"\n";
}

Compilation message (stderr)

teams.cpp:9:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    9 | main() {
      | ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10