Data Packet Routing

#include <iostream>
#include "stdio.h"
 
using namespace std;
 
int main()
{
    int N;
    cin >> N;
    for (int i = 0; i < N; i++) {
        int c, v, from, to;
        cin >> c >> v;
        int Cfrom[c], Cto[c];
        for (int j = 0; j < c; j++) {
            Cfrom[j] = 0;
            Cto[j] = 0;
        }
        for (int j = 0; j < v; j++) {
            cin >> from >> to;
            Cfrom[from]++;
            Cto[to]++;
        }
        int m = 0;
        for (int j = 0; j < c; j++) {
            if (Cfrom[j] > m) m = Cfrom[j];
            if (Cto[j] > m) m = Cto[j];
        }
        printf("%i\n", m);
    }
 
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER