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C.cpp
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C.cpp
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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define mp make_pair
#define ff first
#define ss second
#define vi vector<int>
#define pii pair<int, int>
#define all v.begin(),v.end()
#define mod 1000000007
#define ps(x,y) fixed << setprecision(y) << x
#define fastio ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL);
int main()
{
fastio
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int T;
cin >> T;
while (T-- > 0)
{
string s;
cin >> s;
stack<char> s1;
stack<char> s2;
ll pairs = 0;
for (int i = 0; i < (int)s.length(); i++)
{
if (s[i] == '(')
{
s1.push(s[i]);
}
else if (s[i] == '[')
{
s2.push(s[i]);
}
else if (s[i] == ')' && !s1.empty() && s1.top() == '(')
{
pairs++;
s1.pop();
}
else if (s[i] == ']' && !s2.empty() && s2.top() == '[')
{
pairs++;
s2.pop();
}
}
cout << pairs << '\n';
}
return 0;
}