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feat: blyat

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s-prechtl 2024-12-02 20:12:45 +01:00
parent 7f7a6c21e9
commit 1ecac60045
1 changed files with 102 additions and 40 deletions
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138
2024/Day2/src/main.c
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@ -6,13 +6,14 @@
int count_lines(char *filename); int count_lines(char *filename);
int check_report(char *line, int is_problem);
int main() { int main() {
FILE *file; FILE *file;
char filename[] = "input.txt"; char filename[] = "input.txt";
char *buffer = malloc(BUFFER_SIZE); char *buffer = malloc(BUFFER_SIZE);
char *saveptr;
char *current_number_string;
int count = 0; int count = 0;
int check;
file = fopen(filename, "r"); file = fopen(filename, "r");
@ -22,44 +23,24 @@ int main() {
} }
while (fgets(buffer, BUFFER_SIZE, file) != NULL) { while (fgets(buffer, BUFFER_SIZE, file) != NULL) {
char *line = buffer; char *buffer_copy = malloc(BUFFER_SIZE);
int previous_level = -1; memcpy(buffer_copy, buffer, BUFFER_SIZE);
int is_decreasing = -1; check = check_report(buffer, 0);
int is_last = 0; count += check;
while ((current_number_string = strtok_r(line, " ", &saveptr))) { if (!check) {
if (line) { memcpy(buffer, buffer_copy, BUFFER_SIZE);
line = NULL; remove_second_level(buffer);
check = check_report(buffer, 1);
count += check;
} }
if (current_number_string[strlen(current_number_string) - 1] == '\n') { if (!check) {
current_number_string[strlen(current_number_string) - 1] = '\0'; memcpy(buffer, buffer_copy, BUFFER_SIZE);
is_last = 1; remove_first_level(buffer);
} check = check_report(buffer, 1);
int level = atoi(current_number_string); count += check;
if (previous_level == -1) {
previous_level = level;
continue;
}
if (abs(level - previous_level) < 1 || abs(level - previous_level) > 3) {
break;
}
if (is_decreasing == -1) {
is_decreasing = (level < previous_level) ? 1 : 0;
}
if (is_decreasing && level < previous_level) {
previous_level = level;
if (is_last) {
count++;
}
} else if (!is_decreasing && level > previous_level) {
previous_level = level;
if (is_last) {
count++;
}
} else {
break;
} }
if (!check) {
printf("%s", buffer_copy);
} }
} }
printf("%d", count); printf("%d", count);
@ -68,3 +49,84 @@ int main() {
return 0; return 0;
} }
void remove_second_level(char *report) {
char *first_space = strchr(report, ' ');
if (!first_space)
return;
char *second_space = strchr(first_space + 1, ' '); // Find the second space
if (!second_space)
return;
memmove(first_space + 1, second_space + 1, strlen(second_space + 1) + 1);
}
void remove_first_level(char *report) {
char *first_space = strchr(report, ' ');
if (!first_space)
return;
memmove(report, first_space + 1, strlen(first_space + 1) + 1);
}
int check_report(char *report, int is_problem) {
char *current_number_string;
char *saveptr;
int previous_level = -1;
int is_decreasing = -1;
int is_last = 0;
int level;
while ((current_number_string = strtok_r(report, " ", &saveptr))) {
if (report) {
report = NULL;
}
if (current_number_string[strlen(current_number_string) - 1] == '\n') {
current_number_string[strlen(current_number_string) - 1] = '\0';
is_last = 1;
}
level = atoi(current_number_string);
if (previous_level == -1) {
previous_level = level;
continue;
}
if (abs(level - previous_level) < 1 || abs(level - previous_level) > 3) {
if (!is_problem) {
if (is_last) {
return 1;
}
is_problem = 1;
continue;
} else {
break;
}
}
if (is_decreasing == -1) {
is_decreasing = (level < previous_level) ? 1 : 0;
}
if (is_decreasing && level < previous_level) {
previous_level = level;
if (is_last) {
return 1;
}
} else if (!is_decreasing && level > previous_level) {
previous_level = level;
if (is_last) {
return 1;
}
} else {
if (!is_problem) {
if (is_last) {
return 1;
}
is_problem = 1;
continue;
} else {
break;
}
}
}
return 0;
}