#include<stdio.h>
main()
{int a,b,n,fib=0;
a=0,b=1;
scanf("%d",&n);
if(n==0||n==1)
printf("%d\n",n);
while(n--!=0)
{

fib=a+b;
a=b;
b=fib;
printf("%d+",fib);

}
}

for n = 3 o/p is 1+2+3+
how to remve that extra '+' at the end of 3 so that o/p become 1+2+3


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