Submission #440935

#	Time	Username	Problem	Language	Result	Execution time	Memory
440935		ogibogi2004	Fountain Parks (IOI21_parks)	C++17	5 / 100	355 ms	30884 KiB

parks

#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
struct point
{
	int x,y,idx;
	bool operator<(point const& other)const
	{
		return y<other.y;
	}
};
map<pair<int,int>,int>number;
int construct_roads(vector<int> x, vector<int> y) {
    if (x.size() == 1) {
	build({}, {}, {}, {});
        return 1;
    }
    vector<point>v[2];
    int n=x.size();
    for(int i=0;i<n;i++)
    {
		number[{x[i],y[i]}]=i;
		if(x[i]==2)v[0].push_back({x[i],y[i],i});
		else v[1].push_back({x[i],y[i],i});
	}
	if(v[0].size()==0)
	{
		sort(v[1].begin(),v[1].end());
		vector<int>ans1,ans2,ans3,ans4;
		for(int i=1;i<v[1].size();i++)
		{
			if(v[1][i].y-v[1][i-1].y>2)return 0;
			ans1.push_back(v[1][i-1].idx);
			ans2.push_back(v[1][i].idx);
			ans3.push_back(3);
			ans4.push_back(v[1][i].y-1);
		}
		build(ans1,ans2,ans3,ans4);
		return 1;
	}
	if(v[1].size()==0)
	{
		sort(v[0].begin(),v[0].end());
		vector<int>ans1,ans2,ans3,ans4;
		for(int i=1;i<v[0].size();i++)
		{
			if(v[0][i].y-v[0][i-1].y>2)return 0;
			ans1.push_back(v[0][i-1].idx);
			ans2.push_back(v[0][i].idx);
			ans3.push_back(3);
			ans4.push_back(v[0][i].y-1);
		}
		build(ans1,ans2,ans3,ans4);
		return 1;
	}
	sort(v[0].begin(),v[0].end());
	sort(v[1].begin(),v[1].end());
	vector<pair<int,int> >intervals[2];
	int l=v[0][0].y;
	vector<int>ans1,ans2,ans3,ans4;
	for(int i=1;i<v[0].size();i++)
	{
		if(v[0][i].y-v[0][i-1].y!=2)
		{
			intervals[0].push_back({l,v[0][i-1].y});
			l=v[0][i].y;
		}
		else
		{
			ans1.push_back(v[0][i-1].idx);
			ans2.push_back(v[0][i].idx);
			ans3.push_back(v[0][i-1].x-1);
			ans4.push_back(v[0][i-1].y+1);
		}
	}
	intervals[0].push_back({l,v[0].back().y});
	l=v[1][0].y;
	for(int i=1;i<v[1].size();i++)
	{
		if(v[1][i].y-v[1][i-1].y!=2)
		{
			intervals[1].push_back({l,v[1][i-1].y});
			l=v[1][i].y;
		}
		else
		{
			ans1.push_back(v[1][i-1].idx);
			ans2.push_back(v[1][i].idx);
			ans3.push_back(v[1][i-1].x+1);
			ans4.push_back(v[1][i-1].y+1);
		}
	}
	intervals[1].push_back({l,v[1].back().y});
	for(int i1=0;i1<intervals[0].size();i1++)
	{
		for(int i2=0;i2<intervals[1].size();i2++)
		{
			if(intervals[0][i1].second<intervals[1][i2].first)continue;
			if(intervals[0][i1].first>intervals[1][i2].second)continue;
			int p1=min(intervals[0][i1].second,intervals[1][i2].second);
			ans1.push_back(number[{2,p1}]);
			ans2.push_back(number[{4,p1}]);
			ans3.push_back(3);
			ans4.push_back(p1-1);
		}
	}
	build(ans1,ans2,ans3,ans4);
    return 1;
}

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:30:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |   for(int i=1;i<v[1].size();i++)
      |               ~^~~~~~~~~~~~
parks.cpp:45:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int i=1;i<v[0].size();i++)
      |               ~^~~~~~~~~~~~
parks.cpp:61:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |  for(int i=1;i<v[0].size();i++)
      |              ~^~~~~~~~~~~~
parks.cpp:78:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |  for(int i=1;i<v[1].size();i++)
      |              ~^~~~~~~~~~~~
parks.cpp:94:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |  for(int i1=0;i1<intervals[0].size();i1++)
      |               ~~^~~~~~~~~~~~~~~~~~~~
parks.cpp:96:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |   for(int i2=0;i2<intervals[1].size();i2++)
      |                ~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30