#include <stdio.h>

char board[3][3] = {
    {' ', ' ', ' '},
    {' ', ' ', ' '},
    {' ', ' ', ' '}
};

void printBoard() {
    for (int i = 0; i < 3; i++) {
        printf("---|---|---\n");
        printf(" %c | %c | %c \n", board[i][0], board[i][1], board[i][2]);
    }
    printf("---|---|---\n");
}

int checkWin(char player) {
    for (int i = 0; i < 3; i++) {
        if (board[i][0] == player && board[i][1] == player && board[i][2] == player) return 1;
        if (board[0][i] == player && board[1][i] == player && board[2][i] == player) return 1;
    }
    if (board[0][0] == player && board[1][1] == player && board[2][2] == player) return 1;
    if (board[0][2] == player && board[1][1] == player && board[2][0] == player) return 1;
    
    return 0;
}

int isBoardFull() {
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            if (board[i][j] == ' ') return 0;
        }
    }
    return 1;
}

int main() {
    char currentUser = 'X';
    int x, y;
    
    while (1) {
        printBoard();
        
        if (checkWin('X')) {
            printf("사용자(X)가 승리했습니다!\n");
            break;
        }
        if (checkWin('O')) {
            printf("컴퓨터(O)가 승리했습니다!\n");
            break;
        }
        if (isBoardFull()) {
            printf("비겼습니다!\n");
            break;
        }
        
        if (currentUser == 'X') {
            printf("(x, y) 좌표: ");
            scanf("%d %d", &x, &y);
            
            if (x < 0 || x > 2 || y < 0 || y > 2 || board[x][y] != ' ') {
                printf("오류: 잘못된 위치이거나 이미 놓여진 자리입니다. 다시 입력하세요.\n");
                continue;
            }
            
            board[x][y] = 'X';
            currentUser = 'O';
            
        } else {
            printf("컴퓨터가 자동으로 다음 수를 결정합니다.\n");
            
            int compX = -1, compY = -1;
            for (int i = 0; i < 3; i++) {
                for (int j = 0; j < 3; j++) {
                    if (board[i][j] == ' ') {
                        compX = i;
                        compY = j;
                        break;
                    }
                }
                if (compX != -1) break;
            }
            
            if (compX != -1 && compY != -1) {
                board[compX][compY] = 'O';
                printf("(x, y) 좌표: %d %d\n", compX, compY);
            }
            currentUser = 'X';
        }
    }
    
    return 0;
}