USACO section1.2 Transformation

 /*
 ID: vincent63
 LANG: C
 TASK: transform
 */
 #include <stdio.h>
 #include<stdlib.h>
 #include<string.h>
 static char a[][];
 static char b[][];
 static char temp[][];
 static char temp2[][];
 static int n;
 //return 1 if can be done;
 //return 0,if cant be done;
 //
 int first_tran(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             temp2[j][n--i]=temp[i][j];
             if(a[i][j]!=b[j][n--i]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],j,n-1-i,b[j][n-i]);
             }
         }
     }
     return ret;
 }
 //
 int second_tran(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             temp2[n--i][n--j]=temp[i][j];
             if(a[i][j]!=b[n--i][n--j]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],n-1-i,n-1-j,b[n-1-i][n-1-j]);
             }
         }
     }
     return ret;
 }
 //
 int third_tran(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             temp2[n--j][i]=temp[i][j];
             if(a[i][j]!=b[n--j][i]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],n-1-j,i,b[n-1-j][i]);
             }
         }
     }
     return ret;
 }

 //mirror
 int fouth_tran(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             temp[i][n--j]=a[i][j];
             if(a[i][j]!=b[i][n--j]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],i,n-1-j,b[i][n-1-j]);
             }
         }
     }
     return ret;
 }
 int is_equal(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             if(temp2[i][j]!=b[i][j]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],i,j,b[i][j]);
             }
         }
     }
     return ret;
 }
 //combine
 int fifth_tran(){
     int i,j;
     fouth_tran();
     first_tran();
     if(is_equal()){
         return ;
     }

     printf("\n");
     for(i=;i<n;i++){
           for(j=;j<n;j++){
             printf("%c",temp2[i][j]);
         }
         printf("\n");
     }

     fouth_tran();
     second_tran();
     if(is_equal()){
         return ;
     }
     printf("\n");
     for(i=;i<n;i++){
         for(j=;j<n;j++){
             printf("%c",temp2[i][j]);
         }
         printf("\n");
     }

     fouth_tran();
     third_tran();
     if(is_equal()){
         return ;
     }
     printf("\n");
     for(i=;i<n;i++){
         for(j=;j<n;j++){
             printf("%c",temp2[i][j]);
         }
         printf("\n");
     }

     return ;
 }
 //no change
 int sixth_tran(){
     int ret=;
     int i,j;

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             if(a[i][j]!=b[i][j]){
                 ret=;
                 //printf("not match (%d,%d) %c (%d,%d) %c\n",i,j,a[i][j],i,j,b[i][j]);
             }
         }
     }
     return ret;
 }
 int test_tran(){
     if(first_tran()){
         return ;
     }else if(second_tran()){
         return ;
     }else if(third_tran()){
         return ;
     }else if(fouth_tran()){
         return ;
     }else if(fifth_tran()){
         return ;
     }else if(sixth_tran()){
         return ;
     }
     return ;
 }

 int main () {
     FILE *fin  = fopen ("transform.in", "r");
     FILE *fout = fopen ("transform.out", "w");

     int i,j,ret;
     char buf[];
     char buf2[];

     fgets(buf,,fin);
     n=atoi(buf); 

     for(i=;i<n;i++){
         fgets(buf2,,fin);
         strcpy(a[i],buf2);
     }
     for(i=;i<n;i++){
         fgets(buf2,,fin);
         strcpy(b[i],buf2);
     }

     for(i=;i<n;i++){
         for(j=;j<n;j++){
             printf("%c",a[i][j]);
         }
         printf("\n");
     }
     for(i=;i<n;i++){
         for(j=;j<n;j++){
             printf("%c",b[i][j]);
         }
         printf("\n");
     }

     ret=test_tran();

     char res[];
     sprintf(res,"%d\n",ret);
     fputs(res,fout);
     printf("%d",ret);
     return ;
 }