// Name: msglm
// Date: 
// Program Name:
// Description: 


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

// Named constants

int main() {

    //Variable declaration
    int i;
    int j;
    int rows;

    //Triangle 1
    for ( i = 1; i <= 5; i++ ) {

        for (j = 1; j <= i; j++)
            cout << "*";
        cout << endl;
    }

    //Triangle 2

    for ( i = 5; i >= 1 ; i-- ) { 
        for (j = 1; j <= i ; j++ )
            cout << "*";
        cout << endl;
    }

    //Triangle 3
    do {
    cout << "Enter the number of rowsI (between 2 and 20): ";
    cin >> rows;

    if (rows < 2 || rows > 20)
        cout << "Invalid input, try again!" << endl;
        
    } while(rows < 2 || rows > 20);

    for (i = 1; i <=rows; i++) {
        for (j = 1; j<=i;j++) 
            cout << "*";
        cout << endl;
    }



}

/*This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
 */