Submission #556480

#	Time	Username	Problem	Language	Result	Execution time	Memory
556480		InternetPerson10	Boat (APIO16_boat)	C++17	0 / 100	13 ms	16380 KiB

boat

#include <bits/stdc++.h>
typedef long long ll;

using namespace std;

const ll MOD = 1e9 + 7;
ll BIG = 1000002;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<ll> a(n), b(n);
    vector<ll> nums(BIG);
    nums[0] = 1;
    for(int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
        ll g = 0;
        for(int j = 0; j < a[i]; j++) g += nums[j];
        g %= MOD;
        for(int j = a[i]; j <= b[i]; j++) {
            g += nums[j];
            nums[j] += (g - nums[j]);
            nums[j] += MOD;
            nums[j] %= MOD;
            g %= MOD;
        }
    }
    ll ans = 0;
    for(int i = 1; i < BIG; i++) {
        ans += nums[i];
        ans %= MOD;
    }
    cout << ans << '\n';
}

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