Popular Rice recipe...Wrong Answer...

Can someone please tell me where I am going wrong.Thanks in advance.
Following is the code:

#include
#include

using namespace std;

int main() {
int t; //test case
scanf("%d",&t);
while(t>0)
{
int n,i,k,l,j,val,tl,m; // n-no of names i=no of new names k-
// l-length of original string val - final value
//tl - length of string in names list
i=0;
val=0;
scanf("%d",&n);
char a[100][20];
while(n>0)
{ // printf("\n taking name %d\n",n);
char s[20];
char vote;
scanf("%s %c",&s,&vote);
l=strlen(s);
if(i==0)
{
strcpy(a[i],s);
a[i][l]=vote;
// printf(“first value %s and add %c”,a[i],s[l-1]);
if(vote==’+’)
val=1;
else
val=-1;
i++;
}
else
{
//char b[20];
//for(j=0;j<(l-2);j++)
// b[j]=s[j];
for(j=0;j<=i;j++)
{
tl=strlen(a[i])-1;
k=0;
if(tl==l)
for(m=0;m<l;m++)
{ if(a[j][m]!=s[m])
{
k=1;
break;
}
}
if(k==0)
break;
}
if(j>i) // no match found
{
i++;
strcpy(a[i],s);
a[i][l]=vote;
if(vote==’+’)
val+=1;
else
val-=1;
}
else // match found
{//printf(“matches %s\n”,a[j]);
if( a[j][l-1]==’+’)
val-=1;
else
val+=1;
if(vote==’+’)
val+=1;
else
val-=1;
a[j][l-1]=vote;

          }

    }
    n--;
   // printf("value till now=%d\n",val);
   } 
   //printf("\n test done for %d\n",t);
   printf("%d\n",val);
   t--;  
 }
return 0;

}

Sorry.The formatting isn’t good.Following is the link to the code : http://ideone.com/FjkQ3J

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