39 lines
619 B
C++
39 lines
619 B
C++
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#include<bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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int n;
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cin>>n;
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unordered_map<string,int>m;
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for(int i=0; i<n; ++i)
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{
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string s;
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cin>>s;
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auto it= m.find(s);
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if(it==m.end())
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{
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m[s];
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cout<<"OK"<<endl;
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}
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else
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{
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m[s]++;
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s=s+to_string(m[s]);
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m[s];
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cout<<s<<endl;
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}
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}
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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//cin >> TC;
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//cin.ignore();
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while (TC--) solve();
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}
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