77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
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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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int compare(const void* a, const void* b) {
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return (*(int*)a - *(int*)b);
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}
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int main(int argc, char* argv[]) {
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int size = 0;
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int lines = 0;
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int sum = 0;
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int* list1 = NULL;
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int* list2 = NULL;
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if(argc < 2) {
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fprintf(stderr, "Filename required\n");
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return 1;
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}
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FILE* file = fopen(argv[1], "r");
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if(file == NULL) {
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fprintf(stderr, "Could not open %s\n", argv[1]);
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return 2;
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}
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char* line = NULL;
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size_t line_size = 0;
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while(getline(&line, &line_size, file) > 0) {
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lines += 1;
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}
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rewind(file);
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list1 = malloc(sizeof(int)*lines);
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list2 = malloc(sizeof(int)*lines);
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for(int i = 0; i < lines; i++) {
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char* line_save = NULL;
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getline(&line, &line_size, file);
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char* num1 = strtok_r(line, " ", &line_save);
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char* num2 = strtok_r(NULL, " ", &line_save);
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if(num1 == NULL || num2 == NULL) continue;
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list1[i] = atoi(num1);
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list2[i] = atoi(num2);
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size += 1;
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}
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free(line);
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qsort(list1, size, sizeof(int), compare);
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qsort(list2, size, sizeof(int), compare);
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for(int i = 0; i < size; i++) {
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sum += abs(list1[i] - list2[i]);
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}
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fprintf(stdout, "Sum: %d\n", sum);
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int similarity = 0;
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int* counts = malloc(sizeof(int)*size);
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memset(counts, 0, sizeof(int)*size);
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for(int i = 0; i < size; i++) {
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for(int j = 0; j < size; j++) {
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if(list1[i] == list2[j]) counts[i] += 1;
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}
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}
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for(int i = 0; i < size; i++){
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similarity += list1[i] * counts[i];
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}
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fprintf(stdout, "Similarity: %d\n", similarity);
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return 0;
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}
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