Help me in solving IPCCERT problem

help
,
1

My issue

I’m failing a single test, but I have no idea why. I’m using a vector to store necessary data and after processing data for one player, I clear the vector. Please help me out!

My code

#include <iostream>
#include <vector>
using namespace std;

int main() {
	// your code goes here
	int N, M, K, watchHours, total, v;
	vector<int> arr;
	cin >> N >> M >> K;
	
	for(int i=0; i<N; i++){
	    for(int j=0; j<K+1; j++){
	        cin >> v;
	        arr.push_back(v);
	        watchHours = watchHours + v;
	    }
	    if(arr.at(K)<=10 && watchHours - arr.at(K) >=M){
	        total++;
	    }
	    arr.clear();
	}
	cout << total << endl;
    
	return 0;
}

Learning course: Level up from 1* to 2*
Problem Link: CodeChef: Practical coding for everyone