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2 months ago
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void Mesh_JOO() { int q; cin>>q; stack<int>st; while (q--) { int ty; cin>>ty; if(ty==1) { int x; cin>>x; if (!st.empty())x=max(x,st.top()); st.push(x); }else if (ty==2) { if (!st.empty())st.pop(); }else { cout<<st.top()<<'\n'; } } }
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