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- #include<stdio.h>
- int main()
- {
- int N,t=1,l=1;
- scanf("%d",&N);
- while(1)
- {
- if(N<=l)
- {
- printf("%d",t);
- break;
- }
- l=l*2;
- t++;
- }
- return 0;
- }
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