Submission

Score: 100

User: fotonoi

Problemset: อนุกรม

Language: c

Time: 0.002 second

Submitted On: 2025-10-02 20:04:37

#include<stdio.h>
int main(){
    long long a,sum=1,sum2=1,sum3;
    scanf("%lld",&a);
    for(int i =1;i<a;i++){
        sum3=sum+sum2;
        sum=sum2;
        sum2=sum3;
        
    }
    printf("%lld",sum);
    
    
    
    
    
    
    
    return 0;
}