Submission #546099

#	Time	Username	Problem	Language	Result	Execution time	Memory
546099		CPSC	Calvinball championship (CEOI15_teams)	C++14	20 / 100	247 ms	508 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 = 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]];
        dp1 = dp;
        for (int mx = 1; mx <= n; mx++) {
            dp[mx] = dp1[mx]*mx + dp1[mx + 1]; dp[mx] %= mod;
        }
    }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