oj.uz

Submission #1031121

# Submission time Handle Problem Language Result Execution time Memory
1031121 2024-07-22T15:13:32 Z happy_node Stations (IOI20_stations) C++17
100 / 100
 627 ms 1304 KB 
#include "stations.h"
#include <bits/stdc++.h>
using namespace std;

const int MX=1005;

vector<int> adj[MX];

int cnt=0;

vector<int> tin, tout, dep;

void dfs(int v, int p) {
	tin[v]=cnt++;
	for(auto u:adj[v]) {
		if(u==p) continue;
		dep[u]=dep[v]+1;
		dfs(u,v);
	}
	tout[v]=cnt++;
}

std::vector<int> label(int N, int K, std::vector<int> u, std::vector<int> v) {
	for(int i=0;i<N;i++) adj[i].clear();

	for(int i=0;i<N-1;i++) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}

	cnt=0;
	tin.assign(N,0);
	tout.assign(N,0);
	dep.assign(N,0);
	dfs(0,-1);

	vector<pair<int,int>> res;
	for(int i=0;i<N;i++) {
		if(dep[i]&1) res.push_back({tin[i],i});
		else res.push_back({tout[i],i});
	}

	sort(res.begin(),res.end());	

	vector<int> ans(N);
	for(int i=0;i<N;i++) ans[res[i].second]=i; 

	return ans;
}

int find_next_station(int s, int t, std::vector<int> c) {
	bool ok=1;
	for(auto x:c) ok&=s<=x;

	if(ok) { // s itu tin
		int cur=s;
		for(int i=0;i+1<c.size();i++) {
			if(cur<t && t<=c[i]) { // c_i is tout
				return c[i];
			}
			cur=c[i];
		}
		return c.back();
	} else { // s itu tout
		c.push_back(s);
		for(int i=1;i+1<c.size();i++) {
			if(c[i]<=t && t<c[i+1]) {
				return c[i];
			}
		}
		return c[0];
	}
}

Compilation message

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |   for(int i=0;i+1<c.size();i++) {
      |               ~~~^~~~~~~~~
stations.cpp:66:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |   for(int i=1;i+1<c.size();i++) {
      |               ~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 371 ms 684 KB Output is correct
2 Correct 296 ms 684 KB Output is correct
3 Correct 627 ms 684 KB Output is correct
4 Correct 423 ms 684 KB Output is correct
5 Correct 401 ms 684 KB Output is correct
6 Correct 332 ms 684 KB Output is correct
7 Correct 296 ms 684 KB Output is correct
8 Correct 2 ms 768 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 0 ms 776 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 684 KB Output is correct
2 Correct 395 ms 684 KB Output is correct
3 Correct 581 ms 684 KB Output is correct
4 Correct 399 ms 684 KB Output is correct
5 Correct 392 ms 944 KB Output is correct
6 Correct 306 ms 684 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 351 ms 1200 KB Output is correct
2 Correct 310 ms 940 KB Output is correct
3 Correct 568 ms 684 KB Output is correct
4 Correct 432 ms 684 KB Output is correct
5 Correct 395 ms 696 KB Output is correct
6 Correct 300 ms 684 KB Output is correct
7 Correct 283 ms 684 KB Output is correct
8 Correct 1 ms 776 KB Output is correct
9 Correct 1 ms 776 KB Output is correct
10 Correct 0 ms 768 KB Output is correct
11 Correct 393 ms 684 KB Output is correct
12 Correct 298 ms 788 KB Output is correct
13 Correct 317 ms 1188 KB Output is correct
14 Correct 290 ms 688 KB Output is correct
15 Correct 24 ms 768 KB Output is correct
16 Correct 32 ms 768 KB Output is correct
17 Correct 74 ms 748 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 600 ms 684 KB Output is correct
2 Correct 436 ms 684 KB Output is correct
3 Correct 373 ms 684 KB Output is correct
4 Correct 1 ms 760 KB Output is correct
5 Correct 2 ms 768 KB Output is correct
6 Correct 1 ms 768 KB Output is correct
7 Correct 381 ms 684 KB Output is correct
8 Correct 542 ms 796 KB Output is correct
9 Correct 424 ms 792 KB Output is correct
10 Correct 344 ms 792 KB Output is correct
11 Correct 4 ms 768 KB Output is correct
12 Correct 3 ms 764 KB Output is correct
13 Correct 4 ms 768 KB Output is correct
14 Correct 2 ms 764 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 296 ms 684 KB Output is correct
17 Correct 289 ms 684 KB Output is correct
18 Correct 282 ms 684 KB Output is correct
19 Correct 290 ms 796 KB Output is correct
20 Correct 313 ms 684 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 326 ms 940 KB Output is correct
2 Correct 334 ms 684 KB Output is correct
3 Correct 596 ms 684 KB Output is correct
4 Correct 426 ms 684 KB Output is correct
5 Correct 366 ms 684 KB Output is correct
6 Correct 285 ms 940 KB Output is correct
7 Correct 316 ms 684 KB Output is correct
8 Correct 2 ms 764 KB Output is correct
9 Correct 2 ms 776 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 302 ms 876 KB Output is correct
12 Correct 339 ms 684 KB Output is correct
13 Correct 588 ms 684 KB Output is correct
14 Correct 440 ms 684 KB Output is correct
15 Correct 359 ms 684 KB Output is correct
16 Correct 274 ms 684 KB Output is correct
17 Correct 345 ms 684 KB Output is correct
18 Correct 270 ms 692 KB Output is correct
19 Correct 275 ms 1188 KB Output is correct
20 Correct 243 ms 684 KB Output is correct
21 Correct 23 ms 768 KB Output is correct
22 Correct 33 ms 768 KB Output is correct
23 Correct 55 ms 768 KB Output is correct
24 Correct 2 ms 772 KB Output is correct
25 Correct 2 ms 780 KB Output is correct
26 Correct 2 ms 808 KB Output is correct
27 Correct 1 ms 768 KB Output is correct
28 Correct 0 ms 768 KB Output is correct
29 Correct 355 ms 792 KB Output is correct
30 Correct 330 ms 684 KB Output is correct
31 Correct 297 ms 684 KB Output is correct
32 Correct 358 ms 684 KB Output is correct
33 Correct 298 ms 940 KB Output is correct
34 Correct 188 ms 684 KB Output is correct
35 Correct 267 ms 940 KB Output is correct
36 Correct 242 ms 1304 KB Output is correct
37 Correct 224 ms 900 KB Output is correct
38 Correct 229 ms 804 KB Output is correct
39 Correct 224 ms 800 KB Output is correct
40 Correct 230 ms 932 KB Output is correct
41 Correct 265 ms 1044 KB Output is correct
42 Correct 28 ms 744 KB Output is correct
43 Correct 55 ms 864 KB Output is correct
44 Correct 79 ms 792 KB Output is correct
45 Correct 76 ms 920 KB Output is correct
46 Correct 151 ms 684 KB Output is correct
47 Correct 173 ms 792 KB Output is correct
48 Correct 39 ms 1068 KB Output is correct
49 Correct 28 ms 1304 KB Output is correct