#include <stdio.h>                                               // Q2005_1.c
void main(void) {
    int n = 22;
    int k = 0, d = 1, s = 1;
    while ( s <= n ) {
        d = d + 2;
        s = s + d;
        k = k + 1;
        printf("k = %d\t d = %d\t s = %d\n", k, d, s);
    }
    printf("The result is %d.\n", k);
}