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43 lines (42 loc) · 839 Bytes
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CF_1374_C.cpp
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43 lines (42 loc) · 839 Bytes
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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
cin.tie(0);cin.sync_with_stdio(0);
cout.tie(0);cout.sync_with_stdio(0);
int t = 1;
cin >> t;
while (t--)
{
int size;
cin>>size;
string str;
cin>>str;
int ans=0;
int count=0;
for(int i=0; i<str.size(); i++)
{
if(str[i]=='(')
{
count++;
}
else
{
if(str[i]==')')
{
if(count>=1)
{
count--;
}
else
{
ans++;
}
}
}
}
cout<<ans<<endl;
}
return 0;
}