Submission

Score: 100

User: Ratthathammanoon

Problemset: อนุกรม

Language: cpp

Time: 0.003 second

Submitted On: 2025-10-13 00:39:34

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