ORIGIN

CodeForces-1300 A Non-zero

2020-02-09

A. Non-zero
time limit per test: 1 second
memory limit per test: 256 megabytes
input: standard input
output:standard output

Guy-Manuel and Thomas have an array $a$ of $n$ integers $[a_1,a_2,…,a_n]$. In one step they can add 1 to any element of the array. Formally, in one step they can choose any integer index $i$ $(1≤i≤n)$ and do $a_i:=a_i+1$.

If either the sum or the product of all elements in the array is equal to zero, Guy-Manuel and Thomas do not mind to do this operation one more time.

What is the minimum number of steps they need to do to make both the sum and the product of all elements in the array different from zero? Formally, find the minimum number of steps to make $a_1+a_2+\cdots+an≠0$ and $a_1⋅a_2⋅\space\cdots\space⋅a_n≠0$.

Input

Each test contains multiple test cases.

The first line contains the number of test cases $t$ $(1≤t≤10^3)$. The description of the test cases follows.

The first line of each test case contains an integer $n$ $(1≤n≤100)$ — the size of the array.

The second line of each test case contains $n$ integers $a_1,a_2,…,a_n$ $(−100≤a_i≤100)$ — elements of the array .

Output

For each test case, output the minimum number of steps required to make both sum and product of all elements in the array different from zero.

Example

input

output

Note

In the first test case, the sum is $0$. If we add $1$ to the first element, the array will be $[3,−1,−1]$, the sum will be equal to $1$ and the product will be equal to $3$.

In the second test case, both product and sum are $0$. If we add $1$ to the second and the third element, the array will be $[−1,1,1,1]$, the sum will be equal to $2$ and the product will be equal to $−1$. It can be shown that fewer steps can’t be enough.

In the third test case, both sum and product are non-zero, we don’t need to do anything.

In the fourth test case, after adding $1$ twice to the first element the array will be $[2,−2,1]$, the sum will be $1$ and the product will be $−4$.

Analysis

Calculate the number of zeros and sum.

If there is all zeros, the answer is n + 1;

If there the sum plus zeros is zero, then the answer is zeros + 1;

For other situation, just print the number of zeros.

Code

#include<bits/stdc++.h>

using namespace std;

int main() {
    int t;
    cin >> t;
    while(t --) {
        int n;
        cin >> n;
        int zero = 0;
        int count = 0;
        for(int i = 0; i < n; i ++) {
            int t;
            cin >> t;
            count += t;
            if(t == 0) {
                zero ++;
            }
        }
        if(count == 0 and zero == 0) {
            cout << 1 << endl;
        } else if(count + zero == 0) {
            cout << zero + 1 << endl;
        } else {
            cout << zero << endl;
        }
    }
    return 0;
}