84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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int64_t parse_number(char *end);
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int main(int argc, char **argv) {
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FILE *input;
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char *line = NULL;
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size_t line_buf_length = 0;
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if (argc == 1 || argv[1][0] == '-')
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input = stdin;
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else if ((input = fopen(argv[1], "r")) == NULL) {
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fprintf(stderr, "Cannot open file %s\n", argv[1]);
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return -1;
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}
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getline(&line, &line_buf_length, input);
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char *colon_pos = strchr(line, ':');
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size_t data_len = 0;
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for (char *space_pos = colon_pos+1; space_pos != NULL; space_pos = strchr(space_pos, ' ')) {
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data_len++;
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space_pos++;
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}
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uint64_t *data = (uint64_t *) calloc(data_len, sizeof(uint64_t));
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bool *data_v = (bool *) calloc(data_len, sizeof(bool));
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for (size_t i = 0, seeds_pos = (size_t) colon_pos+2;; seeds_pos++) {
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while (*(char *)(seeds_pos)>>4 == 0x3) seeds_pos++;
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data[i++] = parse_number((char *)(seeds_pos-1));
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if (*(char *)seeds_pos == '\n')
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break;
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}
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while (getline(&line, &line_buf_length, input) != -1) {
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if (line[0]>>4 != 0x3) {
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for (size_t i = 0; i < data_len; ++i)
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data_v[i] = false;
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continue;
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}
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uint64_t dst = 0, src = 0, rng = 0;
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sscanf(line, "%lu %lu %lu\n", &dst, &src, &rng);
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for (size_t i = 0; i < data_len; ++i)
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if (!data_v[i] && data[i] >= src && data[i] < src+rng) {
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data[i] = dst + (data[i] - src);
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data_v[i] = true;
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}
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memset(line, 0, line_buf_length);
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}
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uint64_t lowest_loc_n = INT32_MAX;
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for (size_t i = 0; i < data_len; ++i)
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lowest_loc_n = (data[i] < lowest_loc_n) ? data[i] : lowest_loc_n;
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printf("%lu\n", lowest_loc_n);
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return 0;
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}
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int64_t parse_number(char *end) {
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int64_t num = 0;
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for (size_t m = 1;; m *= 10) {
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if (*end>>4 != 0x3)
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break;
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num += (*end&0xf) * m;
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--end;
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}
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return num;
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} |