40 lines
541 B
C
40 lines
541 B
C
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
int sq_frac(int x);
|
|
|
|
int N = 10000;
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int i, c;
|
|
|
|
c = 0;
|
|
for(i = 1; i <= N; ++i){
|
|
if(sq_frac(i) % 2 == 0){
|
|
++c;
|
|
}
|
|
}
|
|
printf("%d\n", c);
|
|
return 0;
|
|
}
|
|
|
|
int sq_frac(int x)
|
|
{
|
|
int m, n, d, a, c;
|
|
|
|
if((m = sqrt(x)) * m == x){
|
|
return 1;
|
|
}
|
|
d = c = 1;
|
|
n = m;
|
|
do{
|
|
d = (x - n * n) / d;
|
|
a = (n + m) / d;
|
|
n = a * d - n;
|
|
++c;
|
|
}while(d != 1);
|
|
return c;
|
|
}
|
|
|