#include <stdio.h>
#include <string.h>

int main()
{
    char listOfKids[1000][80], lastestKid[80];
    short unsigned int num_kids = 0, loopValue;

    while(fgets(listOfKids[num_kids], 80, stdin))num_kids++;

    strcpy(lastestKid, listOfKids[0]);

    for(loopValue = 0; loopValue < num_kids; loopValue++)
    {
        if(strcasecmp(lastestKid, listOfKids[loopValue]) < 0)
        {
            strcpy(lastestKid, listOfKids[loopValue]);
        }
    }

    printf("%s", lastestKid);

    return 0;
}

está dando runtime error, não sei porque