48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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int main() {
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//load input string
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FILE *file = fopen("input", "r");
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if (file == NULL) {
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perror("main: error opening file.");
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return -1;
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}
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uint32_t ncount = 0;
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uint8_t two_repeating_check = 0;
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uint8_t two_separated_check = 0;
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char input[256];
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while (fgets(input, sizeof(input), file) != NULL) {
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//two letters repeating test
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two_repeating_check = 0;
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for (uint8_t i = 0; i < strlen(input) - 1; i++) {
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for (uint8_t j = i + 2; j < strlen(input) - 1; j++) {
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if (input[i] == input[j] && input[i+1] == input[j+1])
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two_repeating_check = 1;
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}
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}
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//two letters separated by one test
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two_separated_check = 0;
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for (uint8_t i = 0; i < strlen(input) - 1; i++) {
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if (input[i] == input[i+2])
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two_separated_check = 1;
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}
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if (two_repeating_check && two_separated_check)
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ncount++;
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}
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if (ferror(file)) {
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perror("main: error reading file.");
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return -1;
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}
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printf("ncount: %i\n", ncount);
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return 0;
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}
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