#include <iostream> using namespace std; bool satisfiesCondition(int number) { int units = number % 10; int thousands = number / 1000; int hundreds = (number / 100) % 10; int tens = (number / 10) % 10; return units - thousands - hundreds - tens > 0; } int main() { int n; cin >> n; int numbers[100]; int count = 0; for (int i = 0; i < n; ++i) { cin >> numbers[i]; } for (int i = 0; i < n; ++i) { if (satisfiesCondition(numbers[i])) { ++count; } } cout << count << endl; return 0; }