Submission

Score: 100

User: asd

Problemset: อนุกรม

Language: c

Time: 0.002 second

Submitted On: 2025-10-11 10:18:32

#include <stdio.h>


int main(){
	
	int n = 0;
	long long x =1;
	scanf("%d",&n);
	long long y = 1;
	long long sum = 0 ;
	if(n ==0){
		printf("0");
		return 0;
	}
	if (n == 1){
		printf("1");
		return 0;
	}
	if (n == 2){
		printf("1");
		return 0;
	}
	for(int i = 2 ; i < n;i++){
		sum  = x+y;
		x=y;
		y=sum;
	}

	printf("%lld",sum);
	
	return 0;
}