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Submission #440665

# Submission time Handle Problem Language Result Execution time Memory
440665 2021-07-02T17:34:05 Z antontsiorvas Fountain Parks (IOI21_parks) C++17
5 / 100
 130 ms 22480 KB 
#include "parks.h"

#include <cstdio>
#include <algorithm>
#include <map>
using namespace std;

int fount2[200005], fount4[200005];
int sy2[200005], sy4[200005];
int numofvis;
vector<int> adj[200005];
map<int,int> emf;
bool visited[200005];

bool compare2(int a, int b){	return sy2[a] < sy2[b];	}

bool compare4(int a, int b){	return sy4[a] < sy4[b];	}

void dfs(int v){
	visited[v] = true;
	numofvis++;
	int len = adj[v].size();
	for(int i=0; i<len; i++){
		int to = adj[v][i];
		if(!visited[to]) dfs(to);
	}
}

int construct_roads(std::vector<int> x, std::vector<int> y) {
    if (x.size() == 1) {
		build({}, {}, {}, {});
        return 1;
    }
    int n = x.size(), cnt2=0, cnt4=0;
    for(int i=0; i<n; i++){
    	if(x[i] == 2){
    		fount2[cnt2] = i;
    		sy2[cnt2++] = y[i];
		}
		else{
			fount4[cnt4] = i;
    		sy4[cnt4++] = y[i];
		}
    	
	}
    std::sort(&fount2[0],&fount2[cnt2],compare2);
    std::sort(&sy2[0],&sy2[cnt2]);
    std::sort(&fount4[0],&fount4[cnt4],compare4);
//    for(int i=1; i<cnt4; i++) emf[sy4[fount4[i]]] = i; 
//    emf[sy4[fount4[0]]] = -1;
    std::sort(&sy4[0],&sy4[cnt4]);
    for(int i=1; i<cnt4; i++) emf[sy4[i]] = i; 
    emf[sy4[0]] = -1;
    
    std::vector<int> u, v, a, b;
    
    if(cnt2 == 0){
    	for(int i=0; i<cnt4-1; i++){
	    	if(sy4[i+1]-sy4[i] != 2) return 0;
	    	u.push_back(fount4[i]);
	    	v.push_back(fount4[i+1]);
	    	a.push_back(5);
	    	b.push_back(sy4[i]+1);
		}
		build(u, v, a, b);
    	return 1;
	}
	if(cnt4 == 0){
    	for(int i=0; i<cnt2-1; i++){
	    	if(sy2[i+1]-sy2[i] != 2) return 0;
	    	u.push_back(fount2[i]);
	    	v.push_back(fount2[i+1]);
	    	a.push_back(1);
	    	b.push_back(sy2[i]+1);
		}
		build(u, v, a, b);
    	return 1;
	}
	
	for(int i=0; i<cnt2; i++){
		if(i == cnt2-1) continue;
		while(sy2[i+1]-sy2[i] == 2){
			u.push_back(fount2[i]);
			v.push_back(fount2[i+1]);
			a.push_back(1);
			b.push_back(sy2[i]+1);
			i++;
		}
	}
	
	for(int i=0; i<cnt4; i++){
		if(i == cnt4-1) continue;
		while(sy4[i+1]-sy4[i] == 2){
			u.push_back(fount4[i]);
			v.push_back(fount4[i+1]);
			a.push_back(5);
			b.push_back(sy4[i]+1);
			i++;
		}
	}
	
	for(int i=0; i<cnt2; i++){
		int temp = emf[sy2[i]];
		if(temp == 0) continue;
		if(temp == -1) temp = 0;
		u.push_back(fount2[i]);
		v.push_back(fount4[temp]);
		a.push_back(3);
		b.push_back(sy2[i]-1);
	}
	
	int s = u.size();
	for(int i=0; i<s; i++){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs(u[0]);
	if(numofvis != n) return 0;
    build(u, v, a, b);
    return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Incorrect 3 ms 4956 KB Pair u[2]=2 @(2, 4) and v[2]=3 @(4, 6) does not form a valid edge (distance != 2)
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Incorrect 3 ms 4956 KB Pair u[2]=2 @(2, 4) and v[2]=3 @(4, 6) does not form a valid edge (distance != 2)
19 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct
17 Incorrect 3 ms 4940 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct
17 Incorrect 130 ms 22480 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4896 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 4 ms 4940 KB Output is correct
7 Correct 3 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 78 ms 12144 KB Output is correct
10 Correct 10 ms 5836 KB Output is correct
11 Correct 34 ms 8856 KB Output is correct
12 Correct 12 ms 6348 KB Output is correct
13 Correct 15 ms 6748 KB Output is correct
14 Correct 4 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 78 ms 12148 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Incorrect 3 ms 4956 KB Pair u[2]=2 @(2, 4) and v[2]=3 @(4, 6) does not form a valid edge (distance != 2)
19 Halted 0 ms 0 KB -