Monikulmio

input/code.cpp: In function 'int main()':
input/code.cpp:35:25: warning: statement has no effect [-Wunused-value]
   35 |                 prevRow == rowsAndColumns[0].first;
      |                 ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:15:9: warning: 'iterator' may be used uninitialized [-Wmaybe-uninitialized]
   15 |     int iterator,x,y = 0;
      |         ^~~~~~~~

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n, m, k;
    cin >> n>> m >>k;
    string lines[n];
    for (int i = 0; i < n; i++)
    {
        lines[i]= string(m,'.');
    }
    
    pair<int,int> rowsAndColumns[k];

    int iterator,x,y = 0;
    while(iterator<k){
        cin >> y >> x;
        rowsAndColumns[iterator]= make_pair(y,x);
        lines[y].replace(x,1,"*");
        if(y==rowsAndColumns[iterator-1].first){
            int prevCol = rowsAndColumns[iterator-1].second;
            if(x>prevCol){
                lines[y].replace(prevCol+1, x-prevCol-1, string(x-prevCol-1, '='));
            }else{
                lines[y].replace(x+1, prevCol-1, string(prevCol-1,'='));
            }
           
        }

        if(x==rowsAndColumns[iterator-1].second || ((iterator +1 == k)&&(x== rowsAndColumns[0].second))){//if in same column (second is x)
            int prevRow = 0;
            if(x==rowsAndColumns[iterator-1].second){
                prevRow = rowsAndColumns[iterator-1].first;
            }else{
                prevRow == rowsAndColumns[0].first;
            }
            //y is current row
            bool drawingFromBottomUp = prevRow<y;
            if(drawingFromBottomUp){
                for(int i = y-1; i>prevRow; i--){
                    lines[i].replace(x,1, "|");
                }
            }else{
                for(int i = prevRow+1; i<y; i++){
                    lines[i].replace(x,1, "|");
                }
            }
        }


        iterator++;
    }



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

Test 1 (public)

Verdict: WRONG ANSWER

Test 2 (public)

Verdict: WRONG ANSWER

Test 3 (public)

Verdict: WRONG ANSWER

Test 4 (public)

Verdict: WRONG ANSWER

Test 5 (public)

Verdict: WRONG ANSWER

Test 6 (public)

Verdict: WRONG ANSWER

Test 7 (public)

Verdict: RUNTIME ERROR

Test 8 (public)

Verdict: WRONG ANSWER

Test 9 (public)

Verdict: RUNTIME ERROR

Test 10 (public)

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::replace: __pos (which is 98) > this->size() (which is 93)