#include<iostream>
#include<vector>

using namespace std;

int main()
{
	//code
	int T, N;
	int number;
	vector<int> num;
	int p, n;
	int res;
	bool end;
	
	cin >> T;
	while (T--)
	{
	    cin >> N;
	    for (int i = 0;i < N;i++)
	    {
	        cin >> number;
	        num.push_back(number);
	    }
	    res = 0;
	    p = n = -1;
	    end = false;
	    while (!end)
	    {
	        end = true;
    	    for (int i = 0;i < N;i++)
    	    {
    	        if (num[i] > 0)
    	        {
            	    end = false;
    	            p = i;
    	            if (n != -1)
    	            {
    	                if (num[p] + num[n] >= 0)
    	                {
    	                    res += abs(num[n]) * (p - n) * 10;
    	                    num[p] += num[n];
    	                    num[n] = 0;
    	                }
    	                else
    	                {
    	                    res += num[p] * (p - n) * 10;
    	                    num[n] += num[p];
    	                    num[p] = 0;
    	                }
                	    p = n = -1;
    	            }
    	        }
    	        if (num[i] < 0)
    	        {
            	    end = false;
    	            n = i;
    	            if (p != -1)
    	            {
    	                if (num[p] + num[n] >= 0)
    	                {
    	                    res += abs(num[n]) * (n - p) * 10;
    	                    num[p] += num[n];
    	                    num[n] = 0;
    	                }
    	                else
    	                {
    	                    res += num[p] * (n - p) * 10;
    	                    num[n] += num[p];
    	                    num[p] = 0;
    	                }
                	    p = n = -1;
    	            }
    	        }
    	    }
    	    p = n = -1;
	    }
	    cout << res << endl;
	    num.clear();
	}
	return 0;
}
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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

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

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}