Submission

PPPPP-----

Score: 50

User: noppaw

Problemset: อนุกรม

Language: c

Time: 0.002 second

Submitted On: 2024-10-14 21:00:57

#include<stdio.h>

int main(){
    int i,j,k=1,f=1,n;
    scanf("%d",&n);
    if(n>90||n<1){
        return 0;
    }
    if(n==1||n==2){
        printf("1");
        return 0;
    }
    for(i=1;i<=n-2;i++){
        j=f+k;
        k=f;
        f=j;
    }
    printf("%d",j);
    return 0;
}