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12 lines
211 B
C++
12 lines
211 B
C++
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#include<stdio.h>
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int main()
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{
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int A,B,C;
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while(scanf("%d%d%d",&A,&B,&C)!=EOF)
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{
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double x=(double)(B+C)/(A+B+C*2);
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printf("%.6lf\n",(1-x)*B-x*C);
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}
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return 0;
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}
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