21 lines
251 B
C++
21 lines
251 B
C++
#include<cstdio>
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int main(void)
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{
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int n,I,ans=1;
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scanf("%d%d",&n,&I);
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int max=1<<n-1;
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while (ans<max)
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{
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if (I%2==1) {
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I=I/2+1;
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ans=ans*2;
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} else {
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I=I/2;
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ans=ans*2+1;
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}
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}
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printf("%d\n",ans);
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return 0;
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}
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