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int fsqrt(int a)
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{
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int x0=0;
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int x1;
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x1=a/2;
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while(x0-x1!=0)
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{
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x0=x1;
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x1=(x0+a/x0);
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x1=x1/2;
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}
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return x1;
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}
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int main()
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{
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int a;
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a=400;
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int res;
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res=fsqrt(a);
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putint(res);
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res = 10;
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putch(res);
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return 0;
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}
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