Submission #713670

#	Time	Username	Problem	Language	Result	Execution time	Memory
713670		stevancv	Calvinball championship (CEOI15_teams)	C++14	100 / 100	151 ms	520 KiB

teams

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e4 + 2;
const int mod = 1e6 + 7;
const int inf = 1e9;
int Add(int a, int b) {
    a += b;
    if (a >= mod) a -= mod;
    return a;
}
int Mul(int a, int b) {
    ll c = a; c *= b; c %= mod;
    return c;
}
int dp[N], novo[N];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n; cin >> n;
    int mx = 1;
    for (int i = 1; i <= n; i++) {
        int x; cin >> x;
        if (i == 1) continue;
        for (int j = 1; j <= i; j++) {
            novo[j] = 0;
            novo[j] = Add(dp[j - 1], Mul(dp[j], j));
        }
        novo[mx] = Add(novo[mx], x - 1);
        for (int j = 1; j <= i; j++) dp[j] = novo[j];
        smax(mx, x);
    }
    int ans = 1;
    for (int i = 1; i <= n; i++) ans = Add(ans, dp[i]);
    cout << ans << en;
    return 0;
}

• 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