Submission #1145280

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145280		SmuggingSpun	Coin Collecting (JOI19_ho_t4)	C++20	8 / 100	83 ms	8524 KiB

joi2019_ho_t4

#include<bits/stdc++.h>
#define taskname "D"
using namespace std;
typedef long long ll;
const ll INF = 1e18;
template<class T>void minimize(T& a, T b){
	if(a > b){
		a = b;
	}
}
int n;
namespace sub1{
	void solve(){
		vector<pair<int, int>>a(n << 1);
		for(auto& [x, y] : a){
			cin >> x >> y;
		}
		vector<ll>dp(1 << (n << 1), INF);
		dp[0] = 0;
		for(int mask = 1; mask < (1 << (n << 1)); mask++){
			int cnt = __builtin_popcount(mask);
			for(int i = 0; i < (n << 1); i++){
				if(1 << i & mask){
					if(cnt > n){
						minimize(dp[mask], dp[mask ^ (1 << i)] + abs(a[i].first - cnt + n) + abs(a[i].second - 2));
					}
					else{
						minimize(dp[mask], dp[mask ^ (1 << i)] + abs(a[i].first - cnt) + abs(a[i].second - 1));
					}
				}
			}
		}
		cout << dp.back();
	}
}
namespace sub23{
	void solve(){
		
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	if(n <= 10){
		sub1::solve();
	}
	else{
		sub23::solve();
	}
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:44:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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