Submission #1109958

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109958		dsyz	Boat (APIO16_boat)	C++17	9 / 100	2 ms	648 KiB

boat

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define MAXN (1000005)
ll mod = 1e9 + 7;
int main(){
	ios_base::sync_with_stdio(false);cin.tie(0);
	ll N;
	cin>>N;
	ll A[N], B[N];
	for(ll i = 0;i < N;i++){
		cin>>A[i]>>B[i];
	}
	ll dp[N];
	memset(dp,0,sizeof(dp));
	dp[0] = 1;
	for(ll i = 1;i < N;i++){
		dp[i] = 1;
		for(ll j = 0;j < i;j++){
			if(A[j] < A[i]){
				dp[i] += dp[j];
				dp[i] %= mod;
			}
		}
	}
	ll sum = 0;
	for(ll i = 0;i < N;i++){
		sum += dp[i];
		sum %= mod;
	}
	cout<<sum<<'\n';
}

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