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52 lines
679 B
52 lines
679 B
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int main()
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{
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//newline=10;
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int i;
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int sum;
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int a[10];
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sum=0;
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//m = 1478;
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//int t;
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i=0;
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while(i<10)
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{
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a[i]=i+1;
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i=i+1;
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}
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int x;
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int high;
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int low;
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int mid;
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int n;
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n=10;
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x=getint();
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high=n-1;
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low=0;
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mid=(high+low)/2;
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while(a[mid]!=x && low < high)
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{
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mid=(high+low)/2;
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if(x<a[mid])
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high=mid-1;
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else
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{
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low = mid +1;
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}
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}
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if(x==a[mid])
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putint(x);
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else
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{
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x = 0;
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putint(x);
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}
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x = 10;
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putch(x);
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return 0;
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}
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