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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
13 lines
261 B
C++
13 lines
261 B
C++
#include<stdio.h>
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int main(){
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int m,i,n,a[21];
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a[0]=0;a[1]=3;a[2]=7;
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scanf("%d",&m);
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while(m--){
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scanf("%d",&n);
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for(i=3;i<=n;i++){
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a[i]=2*a[i-1]+a[i-2];}
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printf("%d\n",a[n]);}
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return 0;
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}
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