Submission #761626

#	Time	Username	Problem	Language	Result	Execution time	Memory
761626		SanguineChameleon	Ideal city (IOI12_city)	C++17	32 / 100	1085 ms	16468 KiB

city

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

const int maxN = 2e3 + 20;
const int dx[4] = {-1, 1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
int dist[maxN][maxN];

int DistanceSum(int N, int *X, int *Y) {
	fill_n(&dist[0][0], maxN * maxN, -1);
	int min_X = X[0];
	for (int i = 0; i < N; i++) {
		min_X = min(min_X, X[i]);
	}
	for (int i = 0; i < N; i++) {
		X[i] -= min_X - 1;
	}
	int min_Y = Y[0];
	for (int i = 0; i < N; i++) {
		min_Y = min(min_Y, Y[i]);
	}
	for (int i = 0; i < N; i++) {
		Y[i] -= min_Y - 1;
	}
	int res = 0;
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			dist[X[j]][Y[j]] = 0;
		}
		dist[X[i]][Y[i]] = 1;
		deque<pair<int, int>> Q;
		Q.emplace_back(X[i], Y[i]);
		while (!Q.empty()) {
			int cx = Q.front().first;
			int cy = Q.front().second;
			Q.pop_front();
			int cur = dist[cx][cy];
			res += cur - 1;
			for (int d = 0; d < 4; d++) {
				int nx = cx + dx[d];
				int ny = cy + dy[d];
				if (dist[nx][ny] == 0) {
					dist[nx][ny] = cur + 1;
					Q.emplace_back(nx, ny);
				}
			}
		}
	}
	return res / 2;
}

• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45