84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
#include <iostream>
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using namespace std;
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int n, now = 0, m, e[100001][2] = { 0 }, g[100001] = { 0 }, p[100001][4] = { 0 };
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int mins(int a, int b)
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{
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return a < b ? a : b;
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}
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int maxs(int a, int b)
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{
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return a > b ? a : b;
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}
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void party(int a, int b)
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{
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// cout << a << " " << b << ":";
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if (g[a] == 0 && g[b] == 0) {
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g[a] = ++now;
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g[b] = now;
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int a0 = e[a][0], b0 = e[b][0], a1 = e[a][1], b1 = e[b][1];
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p[now][0] = mins(a0, b0);
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p[now][1] = mins(a1, b1);
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p[now][2] = maxs(a0, b0);
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p[now][3] = maxs(a1, b1);
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} else {
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while (p[g[a]][0] == -1) {
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a = p[g[a]][3];
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}
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while (p[g[b]][0] == -1) {
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b = p[g[b]][3];
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}
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if (g[a] > g[b]) {
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int o = a;
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a = b;
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b = o;
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}
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/*cout << g[a] << "?";
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cout << g[b] << "?" << endl;*/
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if (g[a] == 0) {
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g[a] = g[b];
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int a0 = e[a][0], a1 = e[a][1];
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p[g[b]][0] = mins(a0, p[g[b]][0]);
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p[g[b]][1] = mins(a1, p[g[b]][1]);
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p[g[b]][2] = maxs(a0, p[g[b]][2]);
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p[g[b]][3] = maxs(a1, p[g[b]][3]);
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} else {
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if (g[a] != g[b]) {
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p[g[b]][0] = mins(p[g[a]][0], p[g[b]][0]);
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p[g[b]][1] = mins(p[g[a]][1], p[g[b]][1]);
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p[g[b]][2] = maxs(p[g[a]][2], p[g[b]][2]);
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p[g[b]][3] = maxs(p[g[a]][3], p[g[b]][3]);
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p[g[a]][0] = -1, p[g[a]][3] = b;
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}
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}
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}/*
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for (int i = 0; i <= 3; i++) {
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cout << p[g[a]][i] << " ";
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}
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cout << endl;
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for (int i = 0; i <= 3; i++) {
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cout << p[g[b]][i] << " ";
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}
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cout << endl;*/
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}
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int main()
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{
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cin >> n >> m;
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for (int i = 1; i <= n; i++) {
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cin >> e[i][0] >> e[i][1];
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}
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for (int i = 1; i <= m; i++) {
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int yi, er;
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cin >> yi >> er;
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//cout << i << "||";
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party(yi, er);
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}
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int ans = 400000000;
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for (int i = 1; i <= now; i++) {
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if (p[i][0] != -1) {
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int zhou = p[i][2] - p[i][0] + p[i][3] - p[i][1];
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ans = mins(zhou * 2, ans);
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}
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}
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cout << ans;
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max()
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} |