CMake測試沒問題 這裡測試會炸開

以下是我的程式碼

#include<iostream>
#include<algorithm>

using namespace std;

int main()
{
    int nr,n,day[3],d,dayr = 0;

    while(cin >> n >> d)
    {
        for (int i = 0;i < n; i++) {
            for (int j = 0; j < 3; j++) {
                cin >> day[j];
            }
            sort(day, day + 3);
            if (day[2] - day[0] >= d)
            {
                nr = nr+1;
                dayr = dayr + (day[0] + day[1] + day[2])/3;
            }
        }
        cout << nr <<" "<< dayr;
    }
    return 0;
}

nr要初始化