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Submission #436578

# Submission time Handle Problem Language Result Execution time Memory
436578 2021-06-24T16:13:06 Z dqhungdl Fountain Parks (IOI21_parks) C++17
5 / 100
 793 ms 61408 KB 
#include "parks.h"

#include <bits/stdc++.h>
using namespace std;

typedef pair<int,int> ii;
int n;
vector<int> x,y;
map<ii,int> M;

bool isVertical(ii u) {
	return x[u.first]==x[u.second];
}

bool cmp(ii u,ii v) {
	if(x[u.first]==x[v.first]) {
		if(isVertical(u)==isVertical(v))
			return y[u.first]<y[v.first];
		return isVertical(u)>isVertical(v);
	}
	return x[u.first]<x[v.first];
}

vector<ii> constructBenches(vector<ii> &paths) {
	map<ii,int> deg;
	map<ii,bool> mark;
	vector<ii> benchesPos;
	for(int i=0;i<paths.size();i++) {
		ii path=paths[i];
		if(x[path.first]==x[path.second]) {
			int bx=x[path.first],by=y[path.first]+1;
			deg[ii(bx-1,by)]++;
			deg[ii(bx+1,by)]++;
			benchesPos.push_back({bx-1,by});
			benchesPos.push_back({bx+1,by});
		} else {
			int bx=x[path.first]+1,by=y[path.first];
			deg[ii(bx,by-1)]++;
			deg[ii(bx,by+1)]++;
			benchesPos.push_back({bx,by-1});
			benchesPos.push_back({bx,by+1});
		}
	}
	vector<ii> benches;
	for(int i=0;i<paths.size();i++) {
		if(deg[benchesPos[2*i+1]]==1||mark[benchesPos[2*i]]) {
			mark[benchesPos[2*i+1]]=true;
			deg[benchesPos[2*i+1]]--;
			benches.push_back(benchesPos[2*i+1]);
		} else {
			mark[benchesPos[2*i]]=true;
			deg[benchesPos[2*i]]--;
			benches.push_back(benchesPos[2*i]);
		}
	}
	return benches;
}

int construct_roads(std::vector<int> _x, std::vector<int> _y) {
	n=_x.size();
	x=_x,y=_y;
	for(int i=0;i<n;i++)
		M[ii(x[i],y[i])]=i;
	vector<ii> paths;
	for(int i=0;i<n;i++) {
		auto it=M.find({x[i]+2,y[i]});
		if(it!=M.end())
			paths.push_back({i,it->second});
		it=M.find({x[i],y[i]+2});
		if(it!=M.end())
			paths.push_back({i,it->second});
	}
	if(paths.size()<n-1)
		return 0;
	sort(paths.begin(),paths.end(),cmp);
	//for(ii path:paths)
	//	cerr<<x[path.first]<<' '<<y[path.first]<<' '<<x[path.second]<<' '<<y[path.second]<<'\n';
	vector<ii> benches=constructBenches(paths);
	vector<int> U(n-1),V(n-1),A(n-1),B(n-1);
	for(int i=0;i<n-1;i++) {
		U[i]=paths[i].first,V[i]=paths[i].second;
		A[i]=benches[i].first,B[i]=benches[i].second;
	}
	build(U,V,A,B);
	return 1;
}

Compilation message

parks.cpp: In function 'std::vector<std::pair<int, int> > constructBenches(std::vector<std::pair<int, int> >&)':
parks.cpp:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for(int i=0;i<paths.size();i++) {
      |              ~^~~~~~~~~~~~~
parks.cpp:45:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for(int i=0;i<paths.size();i++) {
      |              ~^~~~~~~~~~~~~
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:73:17: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   73 |  if(paths.size()<n-1)
      |     ~~~~~~~~~~~~^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Incorrect 1 ms 204 KB Given structure is not connected: There is no path between vertices 0 and 1
22 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Incorrect 1 ms 204 KB Given structure is not connected: There is no path between vertices 0 and 1
22 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Incorrect 774 ms 45768 KB Tree @(7, 199997) appears more than once: for edges on positions 3 and 4
21 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct
17 Correct 793 ms 61408 KB Output is correct
18 Incorrect 678 ms 61316 KB Given structure is not connected: There is no path between vertices 0 and 105803
19 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 392 ms 30824 KB Output is correct
10 Correct 25 ms 3280 KB Output is correct
11 Correct 149 ms 16720 KB Output is correct
12 Correct 34 ms 4800 KB Output is correct
13 Correct 30 ms 4736 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 344 ms 30748 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Incorrect 1 ms 204 KB Given structure is not connected: There is no path between vertices 0 and 1
22 Halted 0 ms 0 KB -