Abhishek

A ..Multiple of 3


#include <stdio.h>
#include <stdlib.h>

int main() {
long long N;
if (scanf("%lld", &N) != 1) return 0;

long long r = N % 3;
long long ans = N;

if (r == 1) {
// e.g. N=4 → 4%3=1 → nearest is 4−1=3
ans = N - 1;
} else if (r == 2) {
// e.g. N=5 → 5%3=2 → nearest is 5+1=6
ans = N + 1;
}

printf("%lld\n", ans);
return 0;
}

6 days ago | [YT] | 2