pervachi.c

#include <stdio.h>

#define N 5
#define M 3

int main() {
    int arrayOfGuys[N] = { 0 };
    int firstFiveGuys[5] = { 0 };
    int pointerInArrayOfFirstFive = 0;
    int counter = 0;
    int pointer = 0;
    int numOfDeleted = 0;

    while (numOfDeleted != (N - 1)) {
        if (arrayOfGuys[pointer] == 0 && ++counter == M) {
            arrayOfGuys[pointer] = 1;
            numOfDeleted++;
            if (pointerInArrayOfFirstFive < 5) {
                firstFiveGuys[pointerInArrayOfFirstFive++] = pointer;
            }
            counter = 0;
        }
        pointer = (pointer + 1) % N;
    }
    return 0;
}