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