1592 영식이와 친구들

#include <stdio.h>
 
int main() {
    int n, m, l;
    scanf("%d %d %d", &n, &m, &l);
 
    int cnt = 0, maxN = -1, cur = 1;
    int chk[1005] = { 0 };
    chk[1] = 1;
 
    while (1) {
        if (maxN == m)
            break;
 
        if (chk[cur] % 2 == 1) {
            cur += l;
            if (cur > n)
                cur -= n;            
        }
        else {
            cur -= l;
            if (cur <= 0)
                cur += n;
        }
        chk[cur]++;
 
        if (chk[cur] > maxN)
            maxN = chk[cur];
 
        cnt++;
    }
    printf("%d", cnt);
}