Submission #101196

#	Time	Username	Problem	Language	Result	Execution time	Memory
101196		Pro_ktmr	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	20 ms	16768 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
using namespace std;
#define LL long long
#define MP(a,b) make_pair(a,b)
#define int long long
int N;
vector<pair<int,int> > coin;
int dp[20][1<<20];
int solve(int now, int state){
	if(now == 2*N) return 0;
	if(dp[now][state] != -1) return dp[now][state];
	int re = INT_MAX;
	for(int i=0; i<2*N; i++){
		if((state>>i)%2 == 0){
			int y = 1;
			if(i >= N) y = 2;
			int x = i % N + 1;
			re = min(re, abs(coin[now].first-x)+abs(coin[now].second-y)+solve(now+1, state+(1<<i)));
		}
	}
	return dp[now][state] = re;
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> N;
	if(N > 10) return -1;
	for(int i=0; i<N*2; i++){
		int a,b;
		cin >> a >> b;
		coin.push_back(MP(a,b));
		for(int j=0; j<(1<<20); j++) dp[i][j] = -1;
	}
	cout << solve(0,0) << endl;
	return 0;
}

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