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Submission #1040871

# Submission time Handle Problem Language Result Execution time Memory
1040871 2024-08-01T11:14:42 Z yanb Fountain Parks (IOI21_parks) C++17
45 / 100
 136 ms 25284 KB 
#include <iostream>     // std::cout
#include <algorithm>    // std::sort
#include <vector>       // std::vector
#include "parks.h"


using namespace std;

vector<int> x, y;
vector<int> north, south, east, west;
vector<int> visited;

bool cmpx(int i, int j) {
	if (x[i] == x[j])
		return (y[i] < y[j]);
	return (x[i] < x[j]);
}

bool cmpy(int i, int j) {
	if (y[i] == y[j])
		return (x[i] < x[j]);
	return (y[i] < y[j]);
}



void RunDFS(int s) {
    vector<int> stack;
//    cout << s << visited[s] << " north: " << north[s] << " east: " << east[s] << " south: " << south[s] << " west: " << west[s] << endl;
    stack.push_back(s);
    while (stack.size() > 0) {
	    int t = stack.back();
	    stack.pop_back();
	    if (visited[t] != 1) {
		    visited[t]=1;
		    if(north[t] != -1) stack.push_back(north[t]);
      	 	    if(west[t] != -1) stack.push_back(west[t]);
	            if(south[t] != -1) stack.push_back(south[t]);
       		    if(east[t] != -1) stack.push_back(east[t]);
	    }
    }
}

/*
void RunDFS(int s) {
    if(visited[s] == 1) return;
    visited[s]=1;
    if(north[s] != -1) RunDFS(north[s]);
    if(west[s] != -1) RunDFS(west[s]);
    if(south[s] != -1) RunDFS(south[s]);
    if(east[s] != -1) RunDFS(east[s]);
}
*/

// Edge set and tree set
std::vector<int> u, v, a, b;

void add_edge(int i, int j) {
	u.push_back(i);
	v.push_back(j);
//	cout << "merge " << i << "," << j << endl;
	if (((x[i]+y[i])/2) % 2 == 0) {
		// insert tree on left
		if (x[i] == x[j]) {
			b.push_back( (y[i]+y[j])/2 );
			if (y[j] > y[i]) {
				a.push_back(x[i]-1);
			} else {
				a.push_back(x[i]+1);
			}
		} else {
			a.push_back( (x[i]+x[j])/2 );
			if (x[j] > x[i]) {
				b.push_back(y[i]+1);
			} else {
				b.push_back(y[i]-1);
			}
		}
	} else {
		// insert tree on right
		if (x[i] == x[j]) {
			b.push_back( (y[i]+y[j])/2 );
			if (y[j] > y[i]) {
				a.push_back(x[i]+1);
			} else {
				a.push_back(x[i]-1);
			}
		} else {
			a.push_back( (x[i]+x[j])/2 );
			if (x[j] > x[i]) {
				b.push_back(y[i]-1);
			} else {
				b.push_back(y[i]+1);
			}
		}
	}
}

/*
void build(std::vector<int> u, std::vector<int> v, std::vector<int> a, std::vector<int> b) {
	return 0;
}
*/

int construct_roads(std::vector<int> _x, std::vector<int> _y) {
	x = _x;
	y = _y;
	std::vector<int> idx;

	int n = x.size();

	for(int i=0; i<n; i++) {
		idx.push_back( i );
	}

	/*
	cout << "The vector before applying sort is:\n" ;
	for (int i=0; i<n; i++) {
		cout << idx[i] << ": " << x[idx[i]] << " " << y[idx[i]] << endl;
	}
	*/


	for (int i=0; i<n; i++) {
		north.push_back(-1);
		south.push_back(-1);
		east.push_back(-1);
		west.push_back(-1);
	}


	// Assign north & south
	std::sort(idx.begin(), idx.end(), cmpx);
	for (int i=0; i<n-1; i++) {
		if (x[idx[i]]==x[idx[i+1]] && y[idx[i]]+2 == y[idx[i+1]]) {
			add_edge(idx[i], idx[i+1]);
			north[idx[i]] = idx[i+1];
			south[idx[i+1]] = idx[i];
		}
	}

	// Assign east & west
	std::sort(idx.begin(), idx.end(), cmpy);
	for (int i=0; i<n-1; i++) {
		if (y[idx[i]]==y[idx[i+1]] && x[idx[i]]+2 == x[idx[i+1]]) {
			add_edge(idx[i], idx[i+1]);
			east[idx[i]] = idx[i+1];
			west[idx[i+1]] = idx[i];
		}
	}

//	cout << "Finish assigning directions\n";

	for(int i=0; i<n; i++) {
		visited.push_back(-1);
	}
	RunDFS(0);

	bool connected = true;
	for(int i=0; i<n; i++) {
		if (visited[i] == -1) {
			connected = false;
			break;
		}
	}
	if (connected == false) {
//		cout << "It is not connected" << endl;
		return 0;
	}
//	cout << "It is connected" << endl;


	build(u, v, a, b);

	return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct
17 Incorrect 1 ms 344 KB Tree @(3, 3) appears more than once: for edges on positions 2 and 3
18 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct
17 Incorrect 1 ms 344 KB Tree @(3, 3) appears more than once: for edges on positions 2 and 3
18 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 102 ms 21100 KB Output is correct
21 Correct 108 ms 20844 KB Output is correct
22 Correct 95 ms 20984 KB Output is correct
23 Correct 93 ms 18068 KB Output is correct
24 Correct 73 ms 11584 KB Output is correct
25 Correct 78 ms 14684 KB Output is correct
26 Correct 80 ms 14788 KB Output is correct
27 Correct 107 ms 20164 KB Output is correct
28 Correct 111 ms 20156 KB Output is correct
29 Correct 113 ms 20164 KB Output is correct
30 Correct 106 ms 20216 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 8 ms 2140 KB Output is correct
33 Correct 26 ms 5968 KB Output is correct
34 Correct 136 ms 21240 KB Output is correct
35 Correct 4 ms 1112 KB Output is correct
36 Correct 18 ms 4012 KB Output is correct
37 Correct 38 ms 7832 KB Output is correct
38 Correct 44 ms 9064 KB Output is correct
39 Correct 59 ms 11484 KB Output is correct
40 Correct 82 ms 16032 KB Output is correct
41 Correct 101 ms 18492 KB Output is correct
42 Correct 115 ms 21112 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 1 ms 604 KB Output is correct
56 Correct 51 ms 10784 KB Output is correct
57 Correct 78 ms 15872 KB Output is correct
58 Correct 79 ms 15660 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 114 ms 20324 KB Output is correct
63 Correct 113 ms 20316 KB Output is correct
64 Correct 109 ms 20164 KB Output is correct
65 Correct 2 ms 600 KB Output is correct
66 Correct 3 ms 856 KB Output is correct
67 Correct 47 ms 10108 KB Output is correct
68 Correct 74 ms 16072 KB Output is correct
69 Correct 100 ms 20212 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct
17 Correct 124 ms 20724 KB Output is correct
18 Correct 117 ms 20856 KB Output is correct
19 Correct 115 ms 20980 KB Output is correct
20 Correct 116 ms 25284 KB Output is correct
21 Correct 98 ms 19228 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 16 ms 3788 KB Output is correct
24 Correct 7 ms 1880 KB Output is correct
25 Correct 26 ms 6156 KB Output is correct
26 Correct 46 ms 9036 KB Output is correct
27 Correct 57 ms 11648 KB Output is correct
28 Correct 74 ms 14788 KB Output is correct
29 Correct 94 ms 18660 KB Output is correct
30 Correct 117 ms 20696 KB Output is correct
31 Correct 121 ms 23324 KB Output is correct
32 Correct 110 ms 21956 KB Output is correct
33 Correct 123 ms 20164 KB Output is correct
34 Correct 1 ms 856 KB Output is correct
35 Correct 3 ms 1116 KB Output is correct
36 Correct 50 ms 10740 KB Output is correct
37 Correct 85 ms 16972 KB Output is correct
38 Correct 104 ms 21188 KB Output is correct

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 45 ms 10424 KB Output is correct
10 Correct 4 ms 1500 KB Output is correct
11 Correct 18 ms 5524 KB Output is correct
12 Correct 10 ms 2140 KB Output is correct
13 Correct 9 ms 3668 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 44 ms 10416 KB Output is correct
17 Incorrect 1 ms 344 KB Tree @(3, 3) appears more than once: for edges on positions 2 and 3
18 Halted 0 ms 0 KB -