#include<stdio.h>

void main(){
	int n;
	int m;
	scanf("%d",&n);
	
	if(n>0){
		m=n;
	}else if(n<0){
		m=-1*n;
	}
	printf("%d",m);
} 
/**************************************************************
	Problem: 1348
	User: admin
	Language: C
	Result: Accepted
	Time:9 ms
	Memory:1144 kb
****************************************************************/