Submission #501349

#	Time	Username	Problem	Language	Result	Execution time	Memory
501349		Abrar_Al_Samit	Boat (APIO16_boat)	C++17	9 / 100	3 ms	1356 KiB

boat

#include<bits/stdc++.h>
using namespace std;
const int MX = 505;
const int Mod = 1e9 + 7;
int a[MX], b[MX];
int dp[MX][MX];
int n;
int solve(int i, int prev) {
    if(i>n) return (prev!=0);
    int &ret = dp[i][prev];
    if(ret!=-1) return ret;
    ret = solve(i+1, prev);
    if(b[i]>a[prev]) ret = (ret+solve(i+1, i))%Mod;
    return ret;
}
void PlayGround() {
    cin >> n;
    for(int i=1; i<=n; ++i) {
        cin >> a[i] >> b[i];
    }   
    memset(dp, -1, sizeof dp);
    cout << solve(1, 0) << endl;

}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    PlayGround();
    return 0;
}

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