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  1. Prepare
  2. Mathematics
  3. Number Theory
  4. Closest Number
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Closest Number

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  • saksham__gupta08
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    #include <stdio.h>
#include <math.h>
#include <stdlib.h>

int closest_multiple(int ab, int x) {
    int quotient = ab / x;
    int lower = quotient * x;
    int upper = (quotient + 1) * x;
    int diff_lower = abs(ab - lower);
    int diff_upper = abs(ab - upper);
    if (diff_lower < diff_upper) {
        return lower;
    } else {
        return upper;
    }
}

int main() {
    int T;
    scanf("%d", &T);
    while (T--) {
        long long a, b, x;
        scanf("%lld %lld %lld", &a, &b, &x);
        long long ab;
        if (b >= 0) {
            ab = pow(a, b);
        } else {
            ab = round(pow(a, b));
        }
        printf("%d\n", closest_multiple(ab, x));
    }    
    return 0;
}