day 5

day_5/5.c

···
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
+#define MAX(X, Y) (((X) > (Y)) ? (X) : (Y))
+typedef struct {
+    long long min;
+    long long max;
+} tuple;
+
+
+tuple* remove_element(tuple* arr,int i,int* len) {
+    for (int j = i; j<*len; j++) {
+        arr[j] = arr[j+1];
+
+    }
+    arr = realloc(arr, (*len-1)*sizeof(tuple));
+    (*len)--;
+    return arr;
+
+}
+
+
+
+int main(int argc, char* argv[]) {
+
+    tuple* limits_arr = NULL;
+    int limits_arr_len = 0;
+
+    FILE* f = NULL;
+    ssize_t nread = 0;
+    size_t size = 0;
+    char* line = NULL;
+    long long start;
+    long long end;
+    long long ingridient;
+    int fresh_ingridients = 0;
+    int fresh = 0;
+    unsigned long long total_fresh_num = 0;
+
+    f = fopen(argv[1], "r");
+
+    while ((nread = getline(&line, &size, f)) > 1) {
+        printf("%s",line);
+
+        // add to the list of min and max values in typle format
+        //
+        start = atoll(strsep(&line, "-"));
+        end = atoll(strsep(&line, "-"));
+        int add_new_entry = 1;
+
+        //check overlaps ~ish~ if new range is bridging two other ranges it still results in overlaps.
+        //however reduces the original amount of ranges.
+        if (limits_arr_len>0) {
+            for (int i = 0; i<limits_arr_len; i++) {
+                if (start<=limits_arr[i].max && start >= limits_arr[i].min) {
+                    //[a,start,b],end
+                    // if
+                    if (end >= limits_arr[i].max) {
+                        limits_arr[i].max = end;
+                        add_new_entry = 0;
+                        break;
+                    } else {
+                        add_new_entry = 0;
+                        break;
+                    }
+
+                } else if (start < limits_arr[i].min) {
+                    if (end > limits_arr[i].max) {
+                        limits_arr[i].max = end;
+                        limits_arr[i].min = start;
+                        add_new_entry = 0;
+                        break;
+                    } else if (end<=limits_arr[i].max && end >= limits_arr[i].min) {
+                        limits_arr[i].min = start;
+                        add_new_entry = 0;
+                        break;
+                    } 
+                }
+            }
+        }
+        if (add_new_entry) {
+            limits_arr_len++;
+            limits_arr = realloc(limits_arr, limits_arr_len*sizeof(tuple));
+
+            limits_arr[limits_arr_len-1].min = start;
+            limits_arr[limits_arr_len-1].max = end;
+        }
+    }
+
+
+    // behold, as i am about to write the worst overlap search algorithm known to humankind.
+    int large_repeat = 0;
+
+    do {
+
+        large_repeat = 0;
+        // as long as we do mergets, we run the whole thing again.
+
+        for (int i = 0; i<limits_arr_len; i++) { // limit_arr_len will be changing as this goes i have no idea if this is optimal
+            start = limits_arr[i].min;
+            end = limits_arr[i].max;
+            int repeat = 0; // if a merge happened, we will set repeat to true, and so will run the cycle again to check for new overlaps
+            do {
+                repeat = 0;
+                for (int j = i+1; j<limits_arr_len; j++) {
+                    //this is horrible
+                    // we go over every entry in limit_arr.
+                    // if another entry has one of the ends inside, we set the other end equal to the appropriate value, whichever gives the largest range. 
+                    // then delete it. 
+                    if (limits_arr[j].min >= start && limits_arr[j].min <= end) {
+                        limits_arr[i].max = MAX(end, limits_arr[j].max);
+                        limits_arr = remove_element(limits_arr, j, &limits_arr_len);
+                        repeat = 1;
+                        large_repeat = 1;
+                        j--;
+                    }
+                    else if (limits_arr[j].max >= start && limits_arr[j].max <= end) {
+                        limits_arr[i].min = MIN(start, limits_arr[j].min);
+                        limits_arr = remove_element(limits_arr, j, &limits_arr_len);
+                        repeat = 1;
+                        large_repeat = 1;
+                        j--;
+                    }
+                    else if (limits_arr[j].min <= start && limits_arr[j].max >= end) {
+                        limits_arr[i] = limits_arr[j];
+                        limits_arr = remove_element(limits_arr, j, &limits_arr_len);
+                        repeat = 1;
+                        large_repeat = 1;
+                        j--;
+                    }
+                }
+            }while (repeat);
+        }
+
+
+    }while(large_repeat);
+
+
+
+
+
+
+    for (int i = 0; i<limits_arr_len; i++) {
+        total_fresh_num += limits_arr[i].max - limits_arr[i].min +1;
+        printf("min %lld, max %lld, num: %lld\n",limits_arr[i].min,limits_arr[i].max,(limits_arr[i].max - limits_arr[i].min +1));
+    }
+
+    //not we go through ingridients
+
+    while ((nread = getline(&line, &size, f)) != -1) {
+        printf("%s",line);
+        fresh = 0;
+        ingridient = atoll(line);
+        for (int i = 0; i<limits_arr_len; i++) {
+            if (ingridient >= limits_arr[i].min && ingridient <= limits_arr[i].max) {
+                fresh= 1; 
+                fresh_ingridients++;
+                //               printf("ingridient %lld is fresh in range %lld-%lld\n", ingridient,limits_arr[i].min,limits_arr[i].max);
+                break;
+            }
+        }
+
+    }
+
+
+
+    printf("total %d fresh ingridients",fresh_ingridients);
+    printf("total fresh ingridients possible: %lld\n",total_fresh_num);
+
+    free(limits_arr);
+
+    free(f);
+    free(line);
+
+
+    return 0;
+}

day_5/input.txt

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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
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[phone]
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[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
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[phone]
[phone]
[phone]
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[phone]
[phone]
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[phone]
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[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
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[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]

day_5/mini.txt

···
+3-5
+10-14
+16-20
+12-18
+
+1
+5
+8
+11
+17
+32