题解 | 构造C的歪

#include <stdio.h>

int main() {
    int a, b;
    
    scanf("%d %d",&a,&b);

    if(((a+b)%2) == 0)
    {
        int c = (a + b)/2;
        printf("%d\n",c);
    }
    else
    {
        int c;
        if (a>b) 
        {
            c = a + (a-b);
        }
        else
        {
            c = b + (b-a);
        }
        printf("%d\n",c);
    
    }
}