제출 #1122678

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1122678		gustavo_d	도시들 (IOI15_towns)	C++17	0 / 100	364 ms	504 KiB

towns

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

const int MAXN = 110;
int cache[MAXN][MAXN];
int dist(int a, int b) {
	if (a > b) swap(a, b);
	if (a == b) return 0;
	if (cache[a][b] != 0) return cache[a][b];
	return cache[a][b] = getDistance(a, b);
}

int hubDistance(int n, int sub) {
	int r = 1e9;
	if (sub == 1) {
		for (int i=0; i<n; i++) {
			for (int j=i+1; j<n; j++) {
				map<pair<int, int>, int> mx_dist;
				for (int k=0; k<n; k++) {
					if (k == i or k == j) continue;
					int a = (dist(i, k) + dist(j, k) - dist(i, j)) / 2;
					int x = dist(i, k) - a;
					int y = dist(j, k) - a;
					// // cerr << i << ' ' << j << ' ' << k << ':' << a << ' ' << x << ' ' << y << endl;
					mx_dist[{x, y}] = max({mx_dist[{x, y}], a, x, y});
				}
				int pf[(int)mx_dist.size()+1]; pf[0] = 0; int pf_i = 1;
				int last_x = 0;
				for (auto it=mx_dist.begin(); it != mx_dist.end(); it++, pf_i++) {
					auto [x, y] = it->first;
					int mx = it->second;
					pf[pf_i] = max(mx, x-last_x + pf[pf_i-1]);
					last_x = x;
				}
				int sf[(int)mx_dist.size()+1]; sf[(int)mx_dist.size()] = 0; int sf_i = (int)mx_dist.size()-1;
				int last_y = 0;
				for (auto it = mx_dist.end(); it != mx_dist.begin(); sf_i--) {
					it--;
					auto [x, y] = it->first;
					int mx = it->second;
					sf[sf_i] = max(mx, y-last_y + sf[sf_i+1]);
					last_y = y;
				}
				int pt = 0;
				for (auto it=mx_dist.begin(); it != mx_dist.end(); it++, pt++) {
					int mx = max({it->second, pf[pt+1], sf[pt]});
					r = min(r, mx);
					// cerr << i << ' ' << j << ':' << mx << endl;
				}
			}
		}
	}
	return r;
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 13
• Subtask 6: 0 / 39