Welcome to collectivesolver - Programming & Software Q&A with code examples. A website with trusted programming answers. All programs are tested and work.

Contact: aviboots(AT)netvision.net.il

Secure & Reliable Web Hosting, Free Domain, Free SSL, 1-Click WordPress Install, Expert 24/7 Support

Instant Grammar Checker - Correct all grammar errors and enhance your writing

Semrush - keyword research tool

Linux Foundation Training and Certification

Disclosure: My content contains affiliate links.

33,431 questions

43,811 answers

573 users

How to find an element that appears once in an array of elements that appears three times in C

1 Answer

0 votes
#include <stdio.h>

int findElementThatAppearsOnceInArray(int vec[], int size) {
    int map[1024] = {0}; 

    for (int i = 0; i < size; ++i) {
        map[vec[i]]++;
    }

    for (int i = 0; i < 1000; ++i) {
        if (map[i] == 1) {
            return i;
        }
    }

    return -1;
}

int main() {
    int vec[] = {3, 5, 5, 2, 7, 3, 2, 8, 8, 3, 2, 5, 8};
    int size = sizeof(vec) / sizeof(vec[0]);

    printf("%d\n", findElementThatAppearsOnceInArray(vec, size));

    return 0;
}



/*
run:

7

*/

 



Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now


answered Jul 8 by avibootz
...