Monikulmio

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

int main() {
    // main input
    int n, m, k;
    cin >> n;
    cin >> m;
    cin >> k;
    
    // create the list
    vector<string> rows;
    for (int i = 0; i < n; i++){
        string row (m, '.');
        rows.push_back(row);
    }
    
    // add start point
    int y, x, prev_y, prev_x, start_y, start_x;
    cin >> y;
    cin >> x;
    start_y = y;
    start_x = x;
    rows[y-1][x-1] = '*';
    
    // add characters to the list
    for (int i = 1; i <= k; i++){
        prev_y = y;
        prev_x = x;
        if (i == k){ // back to start
            y = start_y;
            x = start_x;
        } else {
            cin >> y;
            cin >> x;
        }
        
        // add * to the point
        rows[y-1][x-1] = '*';
        
        // add lines between current and last point
        if (x == prev_x){ // up/down
            for (int j = 1; j < abs(prev_y-y); j++){
                if (y > prev_y){
                    rows[y-j-1][x-1] = '|';
                } else {
                    rows[y+j-1][x-1] = '|';
                }
            }
        }
        else if (y == prev_y){ // left/right
            for (int j = 1; j < abs(prev_x-x); j++){
                if (x > prev_x){
                    rows[y-1][x-j-1] = '=';
                } else {
                    rows[y-1][x+j-1] = '=';
                }
            }
        }
        else { // diagonal
            for (int j = 1; j < abs(prev_y-y); j++){
                if (x > prev_x && y > prev_y){
                    rows[y-j-1][x-j-1] = '\\';
                }
                else if  (x > prev_x && y < prev_y){
                    rows[y+j-1][x-j-1] = '/';
                }
                else if (y > prev_y){
                   rows[y-j-1][x+j-1] = '/';
                }
                else {
                    rows[y+j-1][x+j-1] = '\\';
                }
            }
        }
    }
    
    // print the list
    for (string row : rows){
        cout << row << 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