A. Non-zero(思维)

https://codeforces.com/contest/1300/problem/A

---

分情况讨论0的个数和sum的总和即可

#include<iostream>
#include<vector>
#include<queue>
#include<cstring>
#include<cmath>
#include<map>
#include<set>
#include<cstdio>
#include<algorithm>
#define debug(a) cout<<#a<<"="<<a<<endl;
using namespace std;
const int maxn=200;
typedef long long LL;
LL a[maxn];
int main(void)
{
  cin.tie(0);std::ios::sync_with_stdio(false);
  LL t;cin>>t;
  while(t--)
  {
  	LL n;cin>>n;
  	LL sum=0;LL num0=0;
  	for(LL i=1;i<=n;i++) {
  		cin>>a[i];	
  		if(a[i]==0) num0++;
		sum+=a[i];   
	}
	if(num0&&sum==0) cout<<num0<<endl;
	else if(num0&&sum>0) cout<<num0<<endl;
	else if(num0&&sum<0&&num0+sum==0) cout<<num0+1<<endl;
	else if(num0&&sum<0&&num0+sum!=0) cout<<num0<<endl;
	else if(!num0&&sum!=0) cout<<0<<endl;
	else if(!num0&&sum==0) cout<<1<<endl;
  }
return 0;
}