william_zy @ 2022-05-21 19:54:59
#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10;
int n, m;
int fa[N];
int get(int x) {
if (fa[x] == x) return x;
return fa[x] = get(fa[x]);
}
bool same(int x, int y) { return get(x) == get(y); }
void merge(int x, int y) { fa[get(x)] = get(y); }
volatile bool linked[N], open[N];
vector<int> g[N];
int x[N], k;
int main() {
scanf("%d%d", &n, &m);
for (int i = 1; i <= m; i++) {
int u, v;
scanf("%d%d", &u, &v);
g[u + 1].push_back(v + 1);
g[v + 1].push_back(u + 1);
}
cin >> k;
for (int i = 1; i <= k; i++) {
scanf("%d", x + i);
++x[i];
}
for (int i = 1; i <= n; i++) {
fa[i] = i;
}
int sum = n, sigmaclosed = k;
for (int i = k; i >= 1; i--) {
cout<<(sum- sigmaclosed)<<endl;
linked[i] =sum - sigmaclosed;
while(sum - sigmaclosed!=linked[i])linked[i]=sum - sigmaclosed;//加上这句话,就TLE???(尽管代码本身不是AC代码,但是这太奇怪了)
cout<<sum - sigmaclosed<<"="<<linked[i]<<endl;
open[x[i]] = 1;
sigmaclosed--;
for (int j = 0; j < g[x[i]].size(); j++) {
if (open[g[x[i]][j]]) {
if (!same(g[x[i]][j], x[i])) {
merge(g[x[i]][j], x[i]);
--sum;
}
}
}
}
cout << sum << endl;
for (int i = 1; i <= k; i++) {
cout << (linked[i]) << endl;
}
}
这是怎么回事???
by william_zy @ 2022-05-21 19:57:19
注:其他的cout
是调试语句,每次输出的linked[i]
都是1
by william_zy @ 2022-05-21 20:04:53
明白了,linked
写成bool
了
by william_zy @ 2022-05-21 20:05:05
此帖终