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| #include <stdlib.h>
#include <stdbool.h>
#include "snake.h"
int get_arr_size(int *ptr){
ptr++;
int size = 1;
while(*ptr != 0){
size++, ptr++;
}
return size;
}
int identify_column(int *ptr){
for(int i = 0;; i++){
if(ptr[i] != i) return i;
}
return -1;
}
int snake(int *ptr, int *row, int *column) {
int size = get_arr_size(ptr);
int c = identify_column(ptr);
int r = size / c;
int* correct = (int*) malloc((size + 1) * sizeof(int));
int now_num = 0;
for(int i = 0; i < r; i++){
if(i % 2 == 0){
for(int j = 0; j < c; j++){
correct[i * c + j] = now_num;
now_num++;
}
}
else{
for(int j = c - 1; j >= 0; j--){
correct[i * c + j] = now_num;
now_num++;
}
}
}
correct[size] = 0;
for(int i = 0; i < size + 1; i++){
if(ptr[i] != correct[i]){
*row = i / r;
if((*row) % 2 == 0){
*column = i % r;
}
else{
*column = c - (i % r) - 1;
}
return 0;
}
}
*row = r;
*column = c;
return 1;
}
|