题解 | A-B≠C

#include <stdio.h>
#include <math.h>

#define PRECISION 1000000

int main() {
    double a, b, c;
    scanf("%lf %lf %lf", &a, &b, &c);
    int ia = round(a * PRECISION);
    int ib = round(b * PRECISION);
    int ic = round(c * PRECISION);
    printf("%s\n", ia - ib == ic ? "YES" : "NO");
    return 0;
}