Poj 2996 Help Me with the Game

#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
char chess[50][50];
struct location{
int face,row,col;
};
location white[64],black[64];
//K" (1), "Q" (2), "R" (3), "B" (4), "N" (5), or "P" (6).
int change(char a,bool flag)//flag 0->black down 1->white UP
{
if (!flag)
a=a-'a'+'A';
if (a=='K')		return 1;
if (a=='Q')		return 2;
if (a=='R')		return 3;
if (a=='B')		return 4;
if (a=='N')		return 5;
return 6;
}
char rever(int a)
{
if (a==1)		return 'K';
if (a==2)		return 'Q';
if (a==3)		return 'R';
if (a==4)		return 'B';
if (a==5)		return 'N';
if (a==6)		return 'P';
}
bool cmp1(const location a,const location b)//black
{
if (a.face!=b.face)
return a.face<b.face;
if (a.row!=b.row)
return a.row>b.row;
return a.col<b.col;
}
bool cmp2(location a,location b)//white
{
if (a.face!=b.face)
return a.face<b.face;
if (a.row!=b.row)
return a.row<b.row;
return a.col<b.col;
}
int main()
{
int i,j,ii,jj,wcnt,bcnt;
char x;
while (scanf("%s",chess[0])!=EOF){
for (i=1;i<17;i++)
scanf("%s",chess[i]);
wcnt=bcnt=0;
for (i=1,ii=8;i<17;i+=2,ii--)
for (j=2,jj=0;j<33;j+=4,jj++){
if (chess[i][j]>='a'&&chess[i][j]<='z'){
black[bcnt].face=change(chess[i][j],0);
black[bcnt].row=ii,black[bcnt++].col=jj;
}
else if (chess[i][j]>='A'&&chess[i][j]<='Z'){
white[wcnt].face=change(chess[i][j],1);
white[wcnt].row=ii,white[wcnt++].col=jj;
}
}
sort(black,black+bcnt,cmp1);
sort(white,white+wcnt,cmp2);
printf("White: ");
for (i=0;i<wcnt;i++){
if (i)
printf(",");
x=rever(white[i].face);
if (x!='P')
printf("%c",x);
printf("%c%d",white[i].col+'a',white[i].row);
}
printf("/nBlack: ");
for (i=0;i<bcnt;i++){
9376
if (i)
printf(",");
x=rever(black[i].face);
if (x!='P')
printf("%c",x);
printf("%c%d",black[i].col+'a',black[i].row);
}
printf("/n");
}
return 0;
}