Submission #1053533

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053533		VMaksimoski008	Calvinball championship (CEOI15_teams)	C++17	20 / 100	558 ms	32852 KiB

teams

#include <bits/stdc++.h>
#define int long long

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;

int n;
vector<int> v;
ll dp[1005][1005][2];

ll f(int pos, int mx, int under) {
    if(pos == n + 1) return under;
    if(dp[pos][mx][under] != -1) return dp[pos][mx][under];

    ll ans = 0;

    for(int i=1; i<=min(pos, mx+1); i++) {
        if(!under && i > v[pos]) continue;
        ans = (ans + f(pos+1, max(mx, i), under|(i<v[pos]))) % mod;
    }

    return dp[pos][mx][under] = ans;
}

signed main() {
    memset(dp, -1, sizeof(dp));

    cin >> n;
    v.resize(n+1);
    for(int i=1; i<=n; i++) cin >> v[i];

    cout << (f(2, 1, 0) + 1) % mod << '\n';
    return 0;
}

• 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