231128

#include <stdio.h>

int main()

{

int i,a,b,n=0;

scanf("%d %d", &a, &b);

for(i=a ; i<=b ; i++)

{

if(i%2==0)

{

n = n-i;

printf("-%d", i);

}

else if(i%2!=0)

{

n = n+i;

printf("+%d", i);

}

}

printf("=%d", n);

return 0;

}