19 lines
303 B
C
19 lines
303 B
C
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#include <stdio.h>
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int main(void){
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int numbers = 0;
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scanf("%d",&numbers);
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int count = 0, m = 0;
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while(count++ < numbers){
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scanf("%d",&m);
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int i = 0;
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double all = 1.0;
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for(i = 2 ; i <= m; i++){
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if(!(i % 2)) all -= 1.0/i;
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else all += 1.0/i;
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}
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printf("%.2lf\n",all);
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}
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return 0;
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}
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