C :

#include <stdio.h>
#include <string.h>

int main()
{
    char a[5001];
    char b[5001];
    int i,j,m1,m2;
    int count;
    int len;
    while(scanf("%s%s",a,b)!=EOF)
    {
        m1=m2=0;
        len=strlen(a);
        for(i=0; i<len; i++)
        {
            if(a[i]=='+')
                m1++;
            if(b[i]=='+')
                m2++;
        }
        if(m1!=m2)
        {
            printf("-1\n");
            continue;
        }
        count=0;
        for(i=0; i<len; i++)
        {
            if(a[i]!=b[i])
            {
                for(j=i+1; j<len; j++)
                    if(a[j]==b[i])
                        break;
                count+=j-i;
               a[j]=a[i];
            }
            
        }

        printf("%d\n",count);
    }
}

C++ :

#include <stdio.h>
#include <string.h>

int main()
{
char a[5001];
char b[5001];
int aa[5001];
int bb[5001];
int i,j,m1,m2;
int count;
int len;
    while(scanf("%s%s",a,b)!=EOF)
    {
        m1=m2=0;
        len=strlen(a);
        for(i=0;i<len;i++)
        {
            if(a[i]=='+')
            {
                aa[m1]=i;
                m1++;
            }
            if(b[i]=='+')
            {
                bb[m2]=i;
                m2++;

            }
        }
        if(m1!=m2)
        {
        printf("-1\n");
        continue;
        }
        count=0;
        for(i=0;i<m1;i++)
        {
          if(bb[i]>aa[i])
          count+=bb[i]-aa[i];
          else count+=aa[i]-bb[i];
        }
        printf("%d\n",count);
    }
    return 0;
}