poj-3723

刚看完问题有点懵逼，二分图匹配？最大带权二分图匹配？

本来想学学KM算法，结果发现有O（N^3）,告辞~~

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cstring>
#include<queue>
using namespace std;
#define maxn 55000
#define INF 10100
struct Node {
	int be;
	int en;
	int len;
}que[maxn];
bool bml(Node a, Node b) {
	return a.len < b.len;
}
int par[maxn];
int find(int x) {
	if (par[x] != -1) {
		return par[x] = find(par[x]);
	}
	return x;
}
int main() {
	long long ans = 0;
	int T, n, m, r;
	int be, en, len;
	scanf("%d", &T);
	while (T--) {
		scanf("%d %d %d", &n, &m, &r);
		memset(par, -1, sizeof(par));
		for (int i = 0; i < r; i++) {
			scanf("%d %d %d", &que[i].be, &que[i].en, &que[i].len);
			que[i].en += INF;
			que[i].len = -que[i].len;
		}
		sort(que, que + r, bml);
		for (int i = 0; i < r; i++) {
			int a = find(que[i].be);
			int b = find(que[i].en);
			if (a != b) {
				ans += que[i].len;
				par[a] = b;
			}
		}
		printf("%lld
", 10000*(n+m) + ans);
		ans = 0;
	}
	return 0;
}