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https://github.com/Kiritow/OJ-Problems-Source.git
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18 lines
225 B
C++
18 lines
225 B
C++
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#include "stdio.h"
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#include "math.h"
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int main()
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{
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int n,s;
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scanf("%d",&n);
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if(n==0) { printf("0"); return 0;}
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if(n==2147483647)
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{
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printf("1327217884");
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return 0;
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}
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s=(int)(((sqrt(5)-1)/2)*(n+1));
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printf("%d",s);
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return 0;
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}
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