第一周 水题 第二题

#include"pch.h"
#include
using namespace std;
struct room
{
int pi, qi;
};
int main()
{
room room1[100];
int n, i, sum = 0;
cin >> n;
for (i = 0; i < n; i++)
{
cin >> room1[i].pi >> room1[i].qi;
}
cout << endl;
for (i = 0; i < n; i++)
{
int temp;
if (room1[i].pi - room1[i].qi >= 2)
{
temp = 1;
}
else temp = 0;
sum += temp;
}
cout << sum;
}