144 lines
2.7 KiB
C
144 lines
2.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* part2.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tomoron <tomoron@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/07/17 23:03:36 by tomoron #+# #+# */
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/* Updated: 2024/12/08 13:47:46 by tomoron ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include <stdio.h>
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#include <stdlib.h>
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#include "libft/libft.h"
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static int *get_numbers(char *line, int *len)
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{
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int i;
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int *res;
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*len = 0;
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i = 0;
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while(line[i])
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{
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if(line[i] == ' ')
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(*len)++;
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i++;
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}
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*len += 1;
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res = malloc((*len) * sizeof(int));
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i = 0;
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while(*line)
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{
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res[i] = ft_atoi(line);
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i++;
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while(ft_isdigit(*line))
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line++;
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while(*line && !ft_isdigit(*line))
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line++;
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}
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return(res);
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}
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static int next_op(char *op, int i)
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{
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while(i >= 0 && op[i] == '|')
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{
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op[i] = '*';
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i--;
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}
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if(i < 0)
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return(0);
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if(op[i] == '*')
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op[i] = '+';
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else if(op[i] == '+')
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op[i] = '|';
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return(1);
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}
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static long int mult_nb(long int tmp, int nb)
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{
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while(nb)
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{
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nb /= 10;
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tmp *= 10;
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}
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return(tmp);
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}
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static long int test_nbrs(long int test_val, int *nbrs, char *op, int len)
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{
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int i;
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long int tmp;
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tmp = 0;
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while(tmp != test_val)
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{
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tmp = *nbrs;
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i = 1;
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while(i < len)
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{
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if(op[i - 1] == '+')
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tmp += nbrs[i];
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else if(op[i - 1] == '*')
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tmp *= nbrs[i];
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else if(op[i - 1] == '|')
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{
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tmp = mult_nb(tmp, nbrs[i]);
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tmp += nbrs[i];
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}
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if(tmp > test_val)
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break;
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i++;
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}
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if(i == len)
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i--;
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if(!next_op(op, i - 1) && tmp != test_val)
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{
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free(op);
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free(nbrs);
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return(0);
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}
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}
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free(op);
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free(nbrs);
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return(test_val);
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}
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static long int check_line(char *line)
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{
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long int test_val;
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int *nbrs;
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int len;
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char *op;
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test_val = atol(line);
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while(ft_isdigit(*line))
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line++;
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while(*line && !ft_isdigit(*line))
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line++;
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nbrs = get_numbers(line, &len);
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op = malloc(len);
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ft_memset(op, '*', len);
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if(test_nbrs(test_val, nbrs, op, len))
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return(test_val);
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return(0);
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}
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long int resolve_part2(char *input, char **split)
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{
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(void)input;
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long int res;
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res = 0;
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while(*split)
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{
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res+= check_line(*split);
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split++;
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}
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return(res);
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}
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