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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
27 lines
443 B
C++
27 lines
443 B
C++
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#include<stdio.h>
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int arr[21];
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void func( void )
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{
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int i;
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arr[1]=0;arr[2]=1;
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for(i=3;i<=20;i++)
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arr[i]=(i-1)*(arr[i-1]+arr[i-2]);
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}
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int main( void )
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{
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int n,t,i,a;
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double sum;
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func();
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scanf("%d",&t);
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while(t--)
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{ sum=0.0;
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a=1;
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scanf("%d",&n);
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if(n>=10)n=10;
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for(i=2;i<=n;i++)
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a*=i;
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printf("%0.2lf%%\n",(arr[n]*100.0)/a);
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}
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return 0;
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}
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