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

struct Player {
	char name[30];
	int isWinner;
	char phoneNumber[10];
}players[100];

int getPlayersAmount() {
	int playersAmount = 0;

	while (playersAmount > 100 || playersAmount < 1) {
		printf("Podaj liczbe telefonujacych osob:\n");
		scanf("%d", &playersAmount);
	}

	return playersAmount;
}

struct Player getPlayerData() {
	struct Player p;
	printf("Podaj imie:\n");
	scanf("%s", p.name);
	do{
	printf("Podaj nr telefonu:\n");
	scanf("%s", p.phoneNumber);
	}while(strlen(p.phoneNumber) > 9 || strlen(p.phoneNumber) < 9);
	return p;
}

void getPlayersData(struct Player *players, int playersAmount) {
	int i;
	for ( i = 0; i < playersAmount; i++)
		players[i] = getPlayerData();
}

int generateRandomNumber() {
    return rand() % 99;  
}

int pickWinners(struct Player *players, int playersAmount) {
	while (1) {
		int randomNumber = generateRandomNumber();
		printf("Wylosowana liczba to: %d \n", randomNumber);

		if (checkWinners(players, playersAmount, randomNumber) > 0)
			return checkWinners(players, playersAmount, randomNumber);

		printf("Nikt nie wygral - powtarzamy losowanie...\n");
	}
}

int checkWinners(struct Player *players, int playersAmount, int winningNumber) {
	int i;
	int winners = 0;
	for (i = 0; i < playersAmount; i++) {
		int didWin = isWinner(players[i], winningNumber); 
		players[i].isWinner = didWin; 

		if (didWin){
			winners++;
		} 
	}

	return winners;
}

int isWinner(struct Player p, int winningNumber) {
	int strLen = strlen(p.phoneNumber);
	char winningNumberStr[3]; 
	sprintf(winningNumberStr, "%d", winningNumber); 

	if (winningNumber < 10) { 
		winningNumberStr[1] = winningNumberStr[0];
		winningNumberStr[0] = '0';
	}

	return p.phoneNumber[strLen - 2] == winningNumberStr[0] && p.phoneNumber[strLen - 1] == winningNumberStr[1];
}

void printWinners(struct Player *players, int playersAmount, int winnersAmount) {
	printf("Wygralo %d osob :\n",winnersAmount);
	int i;
	for (i = 0; i < playersAmount; i++)
		if (players[i].isWinner)
			printf("	%s \n", players[i].name);
}

int main() {
	srand(time(NULL));
	int playersAmount = getPlayersAmount();
	getPlayersData(players, playersAmount);
	int winnersAmount = pickWinners(players, playersAmount);
	printWinners(players, playersAmount, winnersAmount);
	return 0;
}