117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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typedef struct SimpleVector {
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int *data;
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unsigned int capacity;
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unsigned int size;
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} SimpleVector;
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void sv_init(SimpleVector *sv, unsigned int capacity) {
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memset(sv, 0, sizeof(SimpleVector));
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sv->data = (int*)malloc(capacity * sizeof(int));
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sv->capacity = capacity;
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sv->size = 0;
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}
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void sv_cleanup(SimpleVector *sv) {
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if(sv->data) {
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free(sv->data);
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sv->data = NULL;
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sv->capacity = 0;
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sv->size = 0;
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}
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}
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void sv_add(SimpleVector *sv, int value) {
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if(!sv->data || sv->capacity == 0) {
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return;
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}
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if(sv->size == sv->capacity) {
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int *new_data = (int*)malloc(sv->capacity * 2 * sizeof(int));
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memcpy(new_data, sv->data, sv->size * sizeof(int));
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free(sv->data);
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sv->data = new_data;
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sv->capacity *= 2;
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}
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sv->data[sv->size] = value;
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++sv->size;
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}
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void sv_print(SimpleVector *sv) {
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if(!sv->data || sv->capacity == 0) {
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puts("Invalid SimpleVector, cannot print");
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return;
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} else if(sv->size == 0) {
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puts("SimpleVector is empty");
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return;
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}
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for(unsigned int i = 0; i < sv->size; ++i) {
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printf("%d ", sv->data[i]);
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}
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printf("\n");
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}
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int is_digit_sum_equal(int a, int b) {
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int sum_a = 0;
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int sum_b = 0;
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while(a > 0) {
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sum_a += a % 10;
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a /= 10;
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}
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while(b > 0) {
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sum_b += b % 10;
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b /= 10;
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}
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return sum_a == sum_b ? 1 : 0;
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}
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int main(int argc, char **argv) {
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SimpleVector sv;
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sv_init(&sv, 32);
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int temp_i;
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const char *temp_c;
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--argc; ++argv;
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while(argc > 0) {
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temp_i = 0;
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temp_c = argv[0];
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while(*temp_c != 0) {
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if(*temp_c < '0' || *temp_c > '9') {
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printf("ERROR: Input is not a digit!\n");
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return 1;
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}
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temp_i = temp_i * 10 + *temp_c - '0';
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++temp_c;
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}
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sv_add(&sv, temp_i);
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--argc; ++argv;
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}
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sv_print(&sv);
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// Actually do the problem here
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temp_i = -1;
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int temp_sum;
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for(unsigned int i = 0; i < sv.size; ++i) {
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for(unsigned int j = i + 1; j < sv.size; ++j) {
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if(is_digit_sum_equal(sv.data[i], sv.data[j])) {
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temp_sum = sv.data[i] + sv.data[j];
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printf("%d and %d has sum of %d\n", sv.data[i], sv.data[j], temp_sum);
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if(temp_sum > temp_i) {
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temp_i = temp_sum;
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}
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}
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}
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}
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printf("Got result %d\n", temp_i);
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sv_cleanup(&sv);
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return 0;
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}
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