Submission #1116030

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116030		Dan4Life	Coin Collecting (JOI19_ho_t4)	C++17	8 / 100	132 ms	15000 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N = (int)1e6+1e5;
const int LINF = (int)2e18;
int n, x[N], y[N];
array<int,2> a[N];
int dp[N];
int32_t main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n; n*=2;
    for(int i = 0; i < n; i++) cin >> x[i] >> y[i];
    for(int i = 1; i <= n; i+=2)
        a[i] = {i/2+1,1}, a[i+1] = {i/2+1,2};
    dp[0] = 0;
    for(int mask = 1; mask < (1<<n); mask++){
        int num = __builtin_popcount(mask);
        dp[mask] = LINF;
        for(int i = 0; i < n; i++){
            if(mask>>i&1){
                dp[mask] = min(dp[mask], dp[mask^(1<<i)]
                +abs(a[num][0]-x[i])+abs(a[num][1]-y[i]));
            }
        }
    }
    cout << dp[(1<<n)-1] << "\n";
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63