33 lines
546 B
C
33 lines
546 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(void) {
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FILE *fp;
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char* line = NULL;
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size_t len = 0;
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int valid = 0;
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fp = fopen("input", "r");
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while(getline(&line, &len, fp) != -1) {
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int start, end;
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char subject;
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char* password;
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sscanf(line, "%d-%d %c: %s\n", &start, &end, &subject, password);
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int occ = 0;
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for(int i=0; password[i] != 0; i++) {
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if(password[i] == subject) occ++;
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}
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if(occ <= end && occ >= start) valid++;
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}
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fclose(fp);
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printf("There are %d valid passwords\n", valid);
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}
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