rust

#include <iostream>
#include <array>
#include <queue>

const int size = 10;

std::array<std::array<char, size>, size> readInput() {
    std::array<std::array<char, size>, size> input;
    for (auto& row : input) {
        for (auto& elem : row) {
            std::cin >> elem;
        }
    }
    return input;
}

void findRustPoints(std::array<std::array<char, size>, size>& input, std::queue<std::pair<int, int>>& currentRust) {
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            if (input[i][j] == '!') {
                currentRust.push(std::make_pair(i, j));
            }
        }
    }
}

void makeOneMove(std::array<std::array<char, size>, size>& input, std::queue<std::pair<int, int>>& currentRust) {
    while (!currentRust.empty()) {

        std::pair<int, int> currentRustPair = currentRust.front();
        int row = currentRustPair.first;
        int col = currentRustPair.second;

        if (row - 1 >= 0) {
            if (input[row - 1][col] != '#') {
                input[row - 1][col] = '!';
            }
        }
        if (row + 1 < size) {
            if (input[row + 1][col] != '#') {
                input[row + 1][col] = '!';
            }
        }

        if (col - 1 >= 0) {
            if (input[row][col - 1] != '#') {
                input[row][col - 1] = '!';
            }
        }

        if (col + 1 < size) {
            if (input[row][col + 1] != '#') {
                input[row][col + 1] = '!';
            }
        }
        currentRust.pop();
    }
}

void processRusting(std::array<std::array<char, size>, size>& input, std::queue<std::pair<int, int>>& currentRust, int& rustCount) {
    for (int i = 0; i < rustCount; ++i) {
        findRustPoints(input, currentRust);
        makeOneMove(input, currentRust);
    }
}

void printSolution(std::array<std::array<char, size>, size>& input) {
    for (auto& row : input) {
        for (auto& elem : row) {
            std::cout << elem;
        }
        std::cout << std::endl;
    }
}

int main() {
    std::array<std::array<char, size>, size> input = readInput();
    int rustCount = 0;
    std::cin >> rustCount;
    std::queue<std::pair<int, int>> currentRust;

    processRusting(input, currentRust, rustCount);
    printSolution(input);
}