Submission #144992

#	Time	Username	Problem	Language	Result	Execution time	Memory
144992		Linca_Robert	Cover (COCI18_cover)	C++14	120 / 120	29 ms	504 KiB

cover

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

const int DIM = 5e4 + 5;

int N;
long long dp[DIM];
pair<int,int> arr[DIM];

int main(){

    cin >> N;
    for( int i = 1; i <= N; i++ ){
        cin >> arr[i].first >> arr[i].second;
        if( arr[i].first  < 0 ) arr[i].first  *= (-1);
        if( arr[i].second < 0 ) arr[i].second *= (-1);
    }

    sort( arr + 1, arr + N + 1 );

    for( int i = 1; i <= N; i++ ){
        dp[i] = (1LL<<61);
        int H = 0;
        for( int j = i; j >= 1; j-- ){
            H = max( H, arr[j].second );
            dp[i] = min( dp[i], dp[j - 1] + 4LL * arr[i].first * H );
        }
    }

    cout << dp[N] << "\n";
    return 0;
}

• Subtask 1: 120 / 120