#include <iostream>
#include <math.h>
#include <cmath>

            int a,b;
            cin >> a >> b;
            float k,j,t;
            k= a*b*0.812;
            j=(a/2)*0.6*b+(a/2)*b;
            if (a/2==0){
                if (ceil(j) == ceil(k)){
                    printf("SAME\n");
                }
                else if (ceil(j) < ceil(k))
                    printf("8-12=-4\n");
                else
                    printf(": )\n");

            }
            else{
                if (ceil(j+b) == ceil(k)){
                    printf("SAME\n");
                }
                else if (ceil(j+b) < ceil(k))
                    printf("8-12=-4\n");
                else
                    printf(": )\n");

我用範例給測過了
還是有錯..

但始終不知道哪裡的數值有問題...