import 'dart:io';
import 'dart:math';
import 'dart:math' show Random;

class InputOutput{
var history = new List();
input_output(){
print('Enter the total number of balls to begin with, then press enter and type the maximum number of balls to be removed on a single round...');
}

int input(){
int x = int.parse(stdin.readLineSync());
while (x < 1) {
print('Please enter a positive number...');
x = int.parse(stdin.readLineSync());
}
return x;
}

int player_move(int k, int n){
int m = input();
int tmp;
while(m > k || m < 1){
print('Please enter a positive number...');
m = input();
}
history.add('Player: $m');
tmp = n-m;
print('You removed $m, remaining number of balls is $tmp ');
return m;
}

int PC_move(int n_remain, int k_remove){
print('The PC removed $k_remove balls, the remaining number of balls equals $n_remain.');
history.add('PC: $k_remove');
}

void record(){
for (var i = 0; i < history.length; i++) print(history[i]);
}

}

class Player extends InputOutput{
int player_turn(int n, int k){
int move = player_move(k,n);
n -= move;
return n;
}
}

class PC extends InputOutput{
int PC_turn(int n, int k){
var rand = new Random();
int move = (rand.nextInt(k)%k)+1;
PC_move(n-move, move);
return move;
}
}

class Game extends InputOutput{
var human_player, pc_player;
int num_of_balls, max;
bool human = false, computer = false;
void game_turn(){
print('To start choose a 0 or a 1 to know your turn!');
int turn = int.parse(stdin.readLineSync());
while(turn != 0 && turn != 1){
print('Please enter a 0 or a 1...');
turn = int.parse(stdin.readLineSync());
}
var randomizer = new Random();
var rand_turn = randomizer.nextInt(2);
if (turn == rand_turn){
print('You go first!');
human = true;
}
else if (turn != rand_turn){
print("The PC goes first!");
computer = true;
}
}
Game(Player human_player, PC pc_player){
input_output();
num_of_balls = input();
max = input();
this.human_player = human_player;
this.pc_player = pc_player;
game_turn();
int move;
while (num_of_balls > 0) {
if (human) {
print('Pick a valid number of maximum value equals $max');
num_of_balls = human_player.player_turn(num_of_balls, max);
human = false;
computer = true;
if (num_of_balls <= 0) print('YOU WIN!!!!');
}else if (computer){
move = pc_player.PC_turn(num_of_balls, max);
num_of_balls -= move;
computer = false;
human = true;
if (num_of_balls <= 0) print('The PC won, good luck next time :(');
}
record();
}


}

}

void main(){

var inp_out = new InputOutput();
var human = new Player();
var pc = new PC();
var game = new Game(human, pc);

}