Submission #198294

#TimeUsernameProblemLanguageResultExecution timeMemory
198294forelaxpopa (BOI18_popa)C++14
100 / 100
86 ms376 KiB
#include<bits/stdc++.h> #include "popa.h" using namespace std; int solve(int n,int* lf,int* rg){ stack<int> st; for(int i = 0 ; i < n ; i ++){ lf[i]=-1; rg[i]=-1; while(st.size()&&!query(st.top(),st.top(),st.top(),i)){ lf[i]=st.top(); st.pop(); } if(st.size()){ rg[st.top()]=i; } st.push(i); } while(st.size()>1)st.pop(); int rez=st.top(); st.pop(); return rez; }
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