【題目敘述】https://zerojudge.tw/ShowProblem?problemid=a647
#include <iostream>
using namespace std;
int main() {
int n;
double a, b;
cin >> n;
for (int i = 0; i < n; i++){
cin >> a >> b;
b -= a;
b *= 100;
b /= a;
if (b > 0) b += 0.00001;
if (b < 0) b -= 0.00001;
if (b >= 10) printf(" %.2f%% dispose\n", b);
else if (b <= -10) printf("%.2f%% dispose\n", b);
else if (b >= 0) printf(" %.2f%% keep\n", b);
else if (b >= -7) printf(" %.2f%% keep\n", b);
else printf(" %.2f%% dispose\n", b);
}
}