11 lines
154 B
C
11 lines
154 B
C
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#include <stdio.h>
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#include <math.h>
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int main(void){
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double a, b;
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scanf("%lf %lf",&a,&b);
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sum = atan(b) - atan(a);
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printf("%.6lf",sum);
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return 0;
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}
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