#include <stdio.h> int main() { int n,i,temp; double a= 1.0,b= 2.0; double sum = 0.0; scanf("%d",&n); if(n>=1&&n<=10) { for(i=0;i<n;i++) { sum = sum + b/a; temp = b; b = a + b; a = temp; } } printf("%.6lf",sum); return 0; } |
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