Submission #546100

#	Time	Username	Problem	Language	Result	Execution time	Memory
546100		CPSC	Calvinball championship (CEOI15_teams)	C++17	100 / 100	234 ms	664 KiB

teams

# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pii pair <int ,int>
#define int long long
using namespace std;
const int N = 10005, mod = 1e6 + 7;
int 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];
    }
    vector <int> dp(n + 1, 0), dp1(n + 1,0);
    for (int i = 0; i <= n; i++) {
        dp[i] = 1;
    }
    vector <int> pr(n + 1, 0);
    for (int i = 1; i <= n; i++) {
        pr[i] = max(pr[i - 1], a[i]);
    }
    for (int i = n; i >= 1; i--) {
        ans += (a[i] - 1)*dp[pr[i - 1]]; ans %= mod;
        dp1 = dp;
        for (int mx = 1; mx <= n; mx++) {
            dp[mx] = dp1[mx]*mx + dp1[mx + 1]; dp[mx] %= mod;
        }
    }cout<<(ans+1)%mod<<"\n";
}

Compilation message (stderr)

teams.cpp:10:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   10 | 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