第二题

#include<iostream>

using namespace std;

void input(int*p)

{

    cin >> *p;

for (int i = 1; i < 7; i++)

{

cin >> p[i];

}

}

void fengxi(int*p)

{

int free = 0;

for (int i = 1; i < 7; i += 2)

{

if (*(p + i) <= (*(p + i + 1))-2)

free++;

}

cout << free;

}

int main()

{

int *p = new int[7];

input(p);

fengxi(p);

}