Sicily 1395. Rounders

坑爹的0害我WA好几次

#include <iostream>
#include <cmath>

using namespace std;

int arr[100];

int num_dig(long long n){
	int k=0;
	while(n!=0){
		arr[k++]=n%10;
		n /= 10;
	}
	for(int i=0; i < k-1; i++){
		if(arr[i]>=5) arr[i+1]++;
		arr[i]=0;
	}

	return k;
}

int main()
{
	int n;
	cin >> n;
	while(n--){
		long long num; 
		cin >> num;
		if(num==0) cout << num;
		else {
		int count=num_dig(num);
		//cout << count << endl;
		for(int i=count-1; i >= 0; i--)
			cout << arr[i];
		}
		cout << endl;
	}
	return 0;
}