Submission #1027384

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027384		stdfloat	Boat (APIO16_boat)	C++17	0 / 100	224 ms	398788 KiB

boat

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

const int md = (int)1e9 + 7;

const int N = (int)1e5 + 1;

int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);

    int n;
    cin >> n;

    vector<int> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i] >> b[i];

    vector<vector<int>> dp(n, vector<int>(N));
    for (int i = 0; i < n; i++) {
        for (int j = a[i]; j <= b[i]; j++) {
            dp[i][j] = 1;
            for (int k = 0; k < i; k++) {
                for (int l = a[k]; l <= min(b[k], j - 1); l++) {
                    dp[i][j] = (dp[i][j] + dp[k][l]) % md;
                }
            }
        }
    }

    int sm = 0;
    for (auto i : dp) {
        for (auto j : i) sm = (sm + j) % md;
    }

    cout << sm;
}

/*sub1

vector<int> dp(n);
for (int i = 0; i < n; i++) {
    dp[i] = 1;
    for (int j = 0; j < i; j++) {
        if (a[j] < a[i]) dp[i] = (dp[i] + dp[j]) % md;
    }
}

int sm = 0;
for (auto i : dp) sm = (sm + i) % md;

cout << sm;
*/

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