Submission #205404

#	Time	Username	Problem	Language	Result	Execution time	Memory
205404		oko	Wall (IOI14_wall)	C++14	24 / 100	1132 ms	38612 KiB

wall

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "wall.h"
#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int> >mx[100005],mn[100005];
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[])
{
    for(int i=0;i<k;i++)
    {
        int l=left[i],r=right[i],h=height[i];
        if(op[i]==1)
        {
            mx[l].push_back({0,h});
            mx[r+1].push_back({1,h});
        }
        else
        {
            mn[l].push_back({0,h});
            mn[r+1].push_back({1,h});
        }
    }
    multiset<int>ms;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<mx[i].size();j++)
        {
            pair<int,int>x=mx[i][j];
            if(x.first==0)ms.insert(x.second);
            else ms.erase(ms.lower_bound(x.second));
        }
        if(ms.size()==0)continue;
        finalHeight[i]=*--ms.end();
    }
    ms.clear();
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<mn[i].size();j++)
        {
            pair<int,int>x=mn[i][j];
            if(x.first==0)ms.insert(x.second);
            else ms.erase(ms.lower_bound(x.second));
        }
        if(ms.size()==0)continue;
        int z=*ms.begin();
        finalHeight[i]=min(finalHeight[i],z);
    }
}

Compilation message (stderr)

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<mx[i].size();j++)
                     ~^~~~~~~~~~~~~
wall.cpp:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<mn[i].size();j++)
                     ~^~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 24 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39