#include<iostream> using namespace std; int main() { int n; cin >> n; int c=0; for (int i = 1; i <= n; i++) { int x; cin >> x; int ge = x % 10; int shi = x / 10 % 10; int bai = x / 100 % 10; int qian = x / 1000 % 10; if(ge - bai - qian > 0){ c=c+1; } cout<<n; } return 0; }