Submission #1029369

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029369		VMaksimoski008	Boat (APIO16_boat)	C++17	9 / 100	1 ms	604 KiB

boat

#include <bits/stdc++.h>

#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#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;

//subtask 1 - all different (kolku ima rastecki podnizi)

signed main() {
    int n;
    cin >> n;

    bool sub1 = 1;
    vector<int> a(n+1), b(n+1);
    for(int i=1; i<=n; i++) {
        cin >> a[i] >> b[i];
        if(a[i] < b[i]) sub1 = 0;
    }

    if(sub1) {
        vector<ll> dp(n+1, 1);

        for(int i=2; i<=n; i++)
            for(int j=1; j<i; j++)
                if(a[j] < a[i]) dp[i] = (dp[i] + dp[j]) % mod;

        ll ans = 0;
        for(int i=1; i<=n; i++) ans = (ans + dp[i]) % mod;
        cout << ans << '\n';
        return 0;
    }

    return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42