比赛 |
2024暑假C班集训C |
评测结果 |
WWWWWWWWWW |
题目名称 |
喵星人集会 |
最终得分 |
0 |
用户昵称 |
LikableP |
运行时间 |
0.028 s |
代码语言 |
C++ |
内存使用 |
3.42 MiB |
提交时间 |
2024-07-12 09:58:07 |
显示代码纯文本
#include <iostream>
#include <fstream>
#include <random>
using namespace std;
struct EDGE {
int to, next;
} edge[110];
int head[60], edgeNum;
void AddEdge(int from, int to) {
edgeNum++;
edge[edgeNum].to = to;
edge[edgeNum].next = head[from];
head[from] = edgeNum;
}
int n;
int catCount;
int miao[60];
int main() {
freopen("party.in", "r", stdin);
freopen("party.out", "w", stdout);
cin >> n;
for (int i = 1; i <= n; i++) {
char x;
cin >> x;
if (x == '1') miao[i] = 1, catCount++;
}
default_random_engine engine(time(nullptr));
uniform_real_distribution <double> distribution(0, n + 1 - catCount - 1e-6);
for (int i = 1; i < n; i++) {
int u, v;
cin >> u >> v;
AddEdge(u, v);
AddEdge(v, u);
}
if (catCount == n || catCount == 1) {
cout << 0;
return 0;
} else if (2 <= catCount && catCount <= n - 3) {
cout << (int)distribution(engine);
} else {
cout << "QwQ";
}
return 0;
}