백준 2193) 이친수

https://www.acmicpc.net/problem/2193

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import java.util.Scanner;

public class Main {

public static void main(String[] args){

Scanner scanner = new Scanner(System.in);

int input = scanner.nextInt();

long temp2 = 1;

if (input > 2 ) {

long temp1 = 1;

for (int i=2; i<input; i++) {

long temp3 = temp1 + temp2;

temp1 = temp2;

temp2 = temp3;

}

}

System.out.println(temp2);

scanner.close();

}

}