qq_44879626的博客

#include <iostream>#include <cstring>#include <unordered_set>using namespace std;const int N = 10010;struct Node{ int a, b;}edge[N];int n, m;int color[N];int main(){ cin >> n >> m; for (int i = 0;

#include <iostream>#include <string>using namespace std;bool is_prime(int num){ if (num == 1 || num == 2) return true; for(int i = 2; i * i <= num; i++){ if(num % i == 0) return false; } return true;}int main