View Code of Problem 23

#include<stdio.h>
int day(int a)
{
    if(a==1)
        return 1;
    else if(a==2)
        return 2;
    else
        return (day(a-1)+day(a-2));
}
int main()
{
    int M,i,j,sum;
    scanf("%d",&M);
    while(M!=0)
    {
    if(M<=90)
    {sum=day(M);
    printf("%d\n",sum);
    scanf("%d",&M);}
    }
    return 0;
}

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