USACO section1.2 Transformation

/*
ID: vincent63
LANG: C
TASK: transform
*/
#include <stdio.h>
#include<stdlib.h>
#include<string.h>
static char a[10][10];
static char b[10][10];
static char temp[10][10];
static char temp2[10][10];
static int n;
//return 1 if can be done; 
//return 0,if cant be done;
//90
int first_tran(){
    int ret=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            temp2[j][n-1-i]=temp[i][j];
            if(a[i][j]!=b[j][n-1-i]){
                ret=0;
                //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;
}
//180
int second_tran(){
    int ret=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            temp2[n-1-i][n-1-j]=temp[i][j];
            if(a[i][j]!=b[n-1-i][n-1-j]){
                ret=0;
                //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;
}
//270
int third_tran(){
    int ret=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            temp2[n-1-j][i]=temp[i][j];
            if(a[i][j]!=b[n-1-j][i]){
                ret=0;
                //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=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            temp[i][n-1-j]=a[i][j];
            if(a[i][j]!=b[i][n-1-j]){
                ret=0;
                //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=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            if(temp2[i][j]!=b[i][j]){
                ret=0;
                //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 1;
    }
    
    printf("\n");
    for(i=0;i<n;i++){
          for(j=0;j<n;j++){
            printf("%c",temp2[i][j]);
        }
        printf("\n");            
    }
    
    fouth_tran();
    second_tran();
    if(is_equal()){
        return 1;
    }
    printf("\n");
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            printf("%c",temp2[i][j]);
        }
        printf("\n");            
    }
    
    fouth_tran();
    third_tran();
    if(is_equal()){
        return 1;
    }
    printf("\n");
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            printf("%c",temp2[i][j]);
        }
        printf("\n");            
    }
    
    return 0;    
}
//no change
int sixth_tran(){
    int ret=1;
    int i,j;
          
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            if(a[i][j]!=b[i][j]){
                ret=0;
                //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 1;
    }else if(second_tran()){
        return 2;
    }else if(third_tran()){
        return 3;
    }else if(fouth_tran()){
        return 4;
    }else if(fifth_tran()){
        return 5;
    }else if(sixth_tran()){
        return 6;
    }
    return 7;
}

int main () {
    FILE *fin  = fopen ("transform.in", "r");
    FILE *fout = fopen ("transform.out", "w");
    
    int i,j,ret;
    char buf[10];
    char buf2[20];
    
    fgets(buf,10,fin);
    n=atoi(buf); 
       
    for(i=0;i<n;i++){        
        fgets(buf2,20,fin);
        strcpy(a[i],buf2);            
    }
    for(i=0;i<n;i++){      
        fgets(buf2,20,fin);
        strcpy(b[i],buf2);        
    }
    
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            printf("%c",a[i][j]);
        }
        printf("\n");            
    }
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            printf("%c",b[i][j]);
        }
        printf("\n");            
    }
    
    ret=test_tran();
    
    char res[10];
    sprintf(res,"%d\n",ret);
    fputs(res,fout);
    printf("%d",ret);
    return 0;
}