fine.cpp

#include<iostream>

using namespace std;

int* create2DArray(int rows,int columus){
	int *int_p;
	int_p = new int[rows*columus];
	return int_p;
}

void set(int *arr,int rows,int columus,int desired_row,int desired_columu,int val){
	if((desired_row>=rows && desired_row<0) || (desired_columu>=columus && desired_columu<0)){
		cout<<"not exist";
	}else{
		arr[(desired_row)*columus+desired_columu]=val;
	}
}

int get(int *arr,int rows,int columus,int desired_row,int desired_columu){
	if((desired_row>=rows && desired_row<0) || (desired_columu>=columus && desired_columu<0)){
		cout<<"not exist";
	}else{
		return arr[(desired_row)*columus+desired_columu];
	}
}

int main(){
	int *int_p,rows,columus,drow,dcolumu,val;
	
	cin>>rows>>columus;
	
	int_p = create2DArray(rows,columus);
	
	cin>>drow>>dcolumu>>val;
	
	set(int_p,rows,columus,drow,dcolumu,val);
	
	cin>>drow>>dcolumu;
	
	cout<<get(int_p,rows,columus,drow,dcolumu);
	
	return 0;
}