Submission #819891

#	Time	Username	Problem	Language	Result	Execution time	Memory
819891		Ozy	Boat (APIO16_boat)	C++17	9 / 100	2 ms	340 KiB

boat

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a <<  " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define pll pair<lli,lli> 

#define MAX 500
#define mod 1000000007

lli n,a,b,dp[MAX+2],res,v[MAX+2];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    rep(i,1,n) {
        cin >> a >> b;
        v[i] = a;
    }
    dp[0] = 1;
    rep(i,1,n) {
        repa(j,i-1,0) if (v[j] < v[i]) dp[i] += dp[j];
        res += dp[i];
        dp[i] %= mod;
        res %= mod;
    }
    cout << res;

    return 0;
}

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