Samsung coding question

bomb_spaceship_samsung

/*
You’ll be given a grid as below:

                       0 1 0 2 0 --> Non highlighted part
                       0 2 2 2 1
                       0 2 1 1 1
                       1 0 1 0 0
                       0 0 1 2 2
                       1 1 0 0 1
                       x x S x x  -->highlighted yellow
 In the grid above,     
1: This cell has a coin.
2: This cell has an enemy.
0: It contains nothing.
The highlighted(yellow) zone is the control zone. S is a spaceship that we need to control so that we can get maximum coins.
Now, S’s initial position will be at the center and we can only move it right or left by one cell or do not move. At each time, the non-highlighted part of the grid will move down by one unit.
We can also use a bomb but only once. If we use that, all the enemies in the 5×5 region above the control zone will be killed.
If we use a bomb at the very beginning, the grid will look like this:

0 1 0 2 0  --> Non highlighted part
0 0 0 0 1
0 0 1 1 1
1 0 1 0 0
0 0 1 0 0
1 1 0 0 1
x x S x x  --> highlighted yellow
 As soon as, the spaceship encounters an enemy or the entire grid has come down, the game ends.     
For example,    
At the very first instance, if we want to collect a coin we should move left **( coins=1)**. This is because when the grid comes down by 1 unit we have a coin on the second position and by moving left we can collect that coin. Next, we should move right to collect another coin **( coins=2)** .
After this, remain at the same position **( coins=4)**.
This is the current situation after collecting 4 coins.
0 1 0 2 0                0 1 0 0 0
0 2 2 2 1 -->after using 0 0 0 0 1
x x S x x -->bomb        x x S x x
Now, we can use the bomb to get out of this situation. After this, we can collect at most 1 coin. So maximum coins=5.
*/



#include<iostream>
using namespace std;

void maxCoins(int arr[6][5],int crow,int ccol,int temp,int &ans,int bomb,int effect){
	if(crow == -1){
		if(temp > ans){
			ans = temp;
		}
		return;
	}
	for(int i=-1;i<=1;i++){
		if((ccol+i) < 0 || (ccol+i) > 4)
			continue;
		if(arr[crow][ccol+i] == 1 || arr[crow][ccol+i] == 0){//No enemy
			if(bomb == 0){
				maxCoins(arr,crow-1,ccol+i,temp+arr[crow][ccol+i],ans,bomb,effect-1);//If bomb has already been used, reduce its effect by 1
			}else{
				maxCoins(arr,crow-1,ccol+i,temp+arr[crow][ccol+i],ans,bomb,effect);
			}
			
		}else{//Enemy
			if(bomb == 0){
				if(effect > 0){
					maxCoins(arr,crow-1,ccol+i,temp,ans,bomb,effect-1);//Bomb already used so can pass but effect reduces by 1
				}
			}else{
				maxCoins(arr,crow-1,ccol+i,temp,ans,0,5); //Use bomb ans set effect for five rows
			}
		}
	}
	return;
}

int main(){
	int arr[6][5],ans;
	for(int i=0;i<6;i++){
		for(int j=0;j<5;j++){
			cin >> arr[i][j];
		}
	}
	
	maxCoins(arr,5,2,0,ans,1,0);
	cout << ans;
	return 0;
}

In most of the modern compilers, ans would be by default initialized to 0. You may Initialize it to 0 for your peace of mind.

Hi., gunpreet34 can u you help me in this problem.