제출 #978436

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
978436		alexdd	popa (BOI18_popa)	C++17	61 / 100	228 ms	2000 KiB

popa

#include "popa.h"
#include<bits/stdc++.h>
using namespace std;
map<pair<pair<int,int>,pair<int,int>>,int> mp;
int myquery(int a, int b, int c, int d)
{
    int na=min(a,b),nb=max(a,b),nc=min(c,d),nd=max(c,d);
    if(mp[{{a,b},{c,d}}]==0) mp[{{a,b},{c,d}}] = query(na,nb,nc,nd)+1;
    return mp[{{a,b},{c,d}}]-1;
}
vector<int> ord;
void precalc(int limle[1005])
{
    limle[ord[0]]=0;
    for(int i=1;i<ord.size();i++)
    {
        if(myquery(ord[i-1],ord[i],ord[i],ord[i]))
        {
            limle[ord[i]] = limle[ord[i-1]];
            while(limle[ord[i]]>0 && myquery(ord[limle[ord[i]]-1],ord[i],ord[i],ord[i]))
                limle[ord[i]]--;
        }
        else
        {
            limle[ord[i]] = i;
        }
    }
    for(int i=0;i<ord.size();i++)
        limle[i] = ord[limle[i]];
}
int tole[1005],tori[1005];
int limle[1005],limri[1005];
int calc(int le, int ri)
{
    if(le>ri)
        return -1;
    if(le==ri)
    {
        tole[le]=tori[le]=-1;
        return le;
    }
    for(int root=le;root<=ri;root++)
    {
        if(limle[root]<=le && limri[root]>=ri)
        {
            tole[root] = calc(le,root-1);
            tori[root] = calc(root+1,ri);
            return root;
        }
    }
    return -5;
}
int solve(int N, int* Left, int* Right)
{
    mp.clear();
    ord.clear();
    for(int i=0;i<N;i++)
        ord.push_back(i);
    precalc(limle);
    reverse(ord.begin(),ord.end());
    precalc(limri);
    //for(int i=0;i<N;i++) cout<<i<<"  "<<limle[i]<<" "<<limri[i]<<" lim\n";
    for(int i=0;i<N;i++)
        tole[i]=tori[i]=-1;
    int root = calc(0,N-1);
    for(int i=0;i<N;i++)
    {
        Left[i]=tole[i];
        Right[i]=tori[i];
    }
    return root;
}

컴파일 시 표준 에러 (stderr) 메시지

popa.cpp: In function 'void precalc(int*)':
popa.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i=1;i<ord.size();i++)
      |                 ~^~~~~~~~~~~
popa.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i=0;i<ord.size();i++)
      |                 ~^~~~~~~~~~~

• Subtask 1: 37 / 37
• Subtask 2: 24 / 24
• Subtask 3: 0 / 39