You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
|
|
#define INPUT_FILE ("input.txt")
|
|
#define ARR_LEN (2000)
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
int measurements[ARR_LEN];
|
|
memset(measurements, 0, ARR_LEN * sizeof(int));
|
|
FILE* fp = fopen(INPUT_FILE, "r");
|
|
if(fp == NULL)
|
|
{
|
|
printf("File failed to open for reading...");
|
|
exit(-1);
|
|
}
|
|
|
|
char* line = NULL;
|
|
size_t len = 0;
|
|
ssize_t rc = 0;
|
|
uint16_t ct = 0;
|
|
|
|
// counter that keeps track of how many times a depth measurement has increased
|
|
int increase_count = 0;
|
|
|
|
if((rc = getline(&line, &len, fp)) < 0)
|
|
{
|
|
printf("Bad read...\n");
|
|
exit(-1);
|
|
}
|
|
else
|
|
{
|
|
measurements[ct++] = strtol(line, NULL, 10);
|
|
}
|
|
|
|
while((rc = getline(&line, &len, fp)) >= 0)
|
|
{
|
|
measurements[ct] = strtol(line, NULL, 10);
|
|
if(measurements[ct] - measurements[ct - 1] > 0)
|
|
{
|
|
increase_count++;
|
|
}
|
|
ct++;
|
|
}
|
|
printf("Increase count: %d\n", increase_count);
|
|
|
|
// part 2
|
|
int sum_increase_count = 0;
|
|
for(int ind = 2; ind < ARR_LEN - 1; ind++)
|
|
{
|
|
int sum_one = measurements[ind - 2] +
|
|
measurements[ind - 1] +
|
|
measurements[ind];
|
|
int sum_two = measurements[ind - 1] +
|
|
measurements[ind] +
|
|
measurements[ind + 1];
|
|
sum_increase_count += (sum_two > sum_one);
|
|
}
|
|
printf("Sum increase count: %d\n", sum_increase_count);
|
|
|
|
return 0;
|
|
}
|