Monikulmio

#include <iostream>
#include <vector>
#include <string>
using namespace std;

int sgn(int val) {
    if (val == 0)
    {
        return 0;
    }
    else if (val < 0)
    {
        return -1;
    }
    else
    {
        return 1;
    }
    
}

int main() {
    // Init variables
    int n, m, k; 

    vector<string> board;
    vector<vector<int>> corners;

    cin >> n;
    cin >> m;
    cin >> k;

    // get the corner coords
    for (int i = 0; i < k; i++)
    {   
        int x, y;
        cin >> y;
        cin >> x;
        corners.push_back({y - 1, x - 1});
        
    }
    
    // create board
    for (int i = 0; i < n; i++)
    {
        board.push_back("");
        for (int j = 0; j < m; j++)
        {
            board[i] += ".";
        }
        
    }


    // mark corners and sides
    vector<int> last_corner;
    last_corner = corners.back();

    
    for (auto &&current_corner : corners)
    {
        int y1, x1, y2, x2, dy, dx;
        string side_char;
        y1 = last_corner[0];
        x1 = last_corner[1];
        y2 = current_corner[0];
        x2 = current_corner[1];
        dy = y1 - y2;
        dx = x1 - x2;
        board[y1].replace(x1, 1, "*");
        if (dy == 0)
        {
            side_char = "=";
        }
        else if (dx == 0)
        {
            side_char = "|";
        }
        else if (dx == dy)
        {
            side_char = "\\";
        }
        else
        {
            side_char = "/";
        }
        for (int i = 1; i < max(abs(dx), abs(dy)); i++)
        {

            int fy, fx;
            fy = y2 + i * sgn(dy); 
            fx = x2 + i * sgn(dx);
            board[fy].replace(fx, 1, side_char);
        }
        last_corner = current_corner;

    }
    for (int i = 0; i < n; i++)
    {
        cout << board[i] << "\n";
    }
    cout << endl;
    return 0;
}

Test 1 (public)

Verdict: ACCEPTED

Test 2 (public)

Verdict: ACCEPTED

Test 3 (public)

Verdict: ACCEPTED

Test 4 (public)

Verdict: ACCEPTED

Test 5 (public)

Verdict: ACCEPTED

Test 6 (public)

Verdict: ACCEPTED

Test 7 (public)

Verdict: ACCEPTED

Test 8 (public)

Verdict: ACCEPTED

Test 9 (public)

Verdict: ACCEPTED

Test 10 (public)

Verdict: ACCEPTED