1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
#include <algorithm>
#include <iostream>
#include <queue>
#include <vector>
#include <array>

using namespace std;

struct to_paint {
    char direction;
	int idx;
	int color;
};

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	int n, m;
	cin >> n >> m;

	vector<vector<int>> board(n, vector<int>(m));
	vector<array<int, 26>> colors_in_rows(n);
	vector<array<int, 26>> colors_in_columns(m);

	char color;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			cin >> color;
			board[i][j] = color - 'A';
			colors_in_rows[i][color - 'A']++;
			colors_in_columns[j][color - 'A']++;
		}
	}

	vector<int> zeros_in_rows(n);
	vector<int> zeros_in_columns(m);

	queue<to_paint> to_process;

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 26; j++) {
			zeros_in_rows[i] += (colors_in_rows[i][j] == 0);
		}
		if (zeros_in_rows[i] == 25) {
			for (int j = 0; j < 26; j++) {
				if (colors_in_rows[i][j] != 0)
					to_process.push({'R', i, j});
			}
		}
	}

	for (int i = 0; i < m; i++) {
		for (int j = 0; j < 26; j++) {
			zeros_in_columns[i] += (colors_in_columns[i][j] == 0);
		}
		if (zeros_in_columns[i] == 25) {
			for (int j = 0; j < 26; j++) {
				if (colors_in_columns[i][j] != 0)
					to_process.push({'K', i, j});
			}
		}
	}

	vector<to_paint> to_print;

	while (!to_process.empty()) {
		to_paint one_to_paint = to_process.front();
		to_print.push_back(to_process.front());
		to_process.pop();

		if (one_to_paint.direction == 'R') {
			for (int i = 0; i < m; i++) {
				if(--colors_in_columns[i][one_to_paint.color] == 0) {
                    if (++zeros_in_columns[i] == 25) {
						for (int j = 0; j < 26; j++) {
							if (colors_in_columns[i][j] > 0)
								to_process.push({'K', i, j});
						}
					}
				}
			}
		} else {
			for (int i = 0; i < n; i++) {
				if(--colors_in_rows[i][one_to_paint.color] == 0) {
                    if (++zeros_in_rows[i] == 25) {
						for (int j = 0; j < 26; j++) {
							if (colors_in_rows[i][j] > 0)
								to_process.push({'R', i, j});
						}
					}
				}
			}
		}
	}

	reverse(to_print.begin(), to_print.end());
	cout << to_print.size() << '\n';
	for (auto &one_to_print : to_print) {
		cout << one_to_print.direction << ' ' << one_to_print.idx + 1 << ' ' << char(one_to_print.color + 'A') << '\n';
	}
	
	return 0;
}