习题8-25(uva-11175)

#include <iostream>
#include <istream>
#include <sstream>
#include <vector>
#include <stack>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
#include <algorithm>
#include <numeric>
#include <chrono>
#include <ctime>
#include <cmath>
#include <cctype>
#include <string>
#include <cstdio>
#include <iomanip>


#include <thread>
#include <mutex>
#include <condition_variable>
#include <functional>
#include <iterator>
using namespace std;
const int maxn = 300 + 5;
int t, n, m,kCase = 0,mmp[maxn][maxn],a,b;

bool judge()
{
    
    
	for (int i = 0; i < n; i++){
    
    
		for (int j = 0; j < n; j++) {
    
    
			int fk1 = 0, fk2 = 0;
			for (int k = 0; k < n; k++) {
    
    
				if (mmp[i][k] && mmp[j][k]) fk1 = 1;
				if (mmp[i][k] ^ mmp[j][k]) fk2 = 1;
			}
			if (fk1 && fk2) return false;
		}	
	}
	return true;
}
int main()
{
    
    
	cin >> t;
	while (t--) {
    
    
		cin >> n >> m;
		memset(mmp, 0, sizeof(mmp));
		for (int i = 0; i < m; i++) {
    
    
			cin >> a >> b;
			mmp[a][b] = 1;
		}
		cout << "Case #" << ++kCase << ": ";
		if (judge()) cout << "Yes" << endl;
		else cout << "No" << endl;
	}
	return 0;
}