#include<stdio.h>
main(){
	int a,b,m;
	char c,d;
	scanf("%d%c%d%c",&a,&c,&b,&d);
	if(c=='+'&&d=='='){
		m=a+b;
	printf("%d\n",m);
	}
	
}
/**************************************************************
	Problem: 1130
	User: admin
	Language: C
	Result: Accepted
	Time:17 ms
	Memory:1144 kb
****************************************************************/