Submission #372328

#	Time	Username	Problem	Language	Result	Execution time	Memory
372328		hoaphat1	Airline Route Map (JOI18_airline)	C++17	0 / 100	1530 ms	1048580 KiB

Alice

#include<bits/stdc++.h>

using namespace std;

#include "Alicelib.h"
#include "Boblib.h"

void Alice( int N, int M, int A[], int B[] ) {
	vector<pair<int,int>> edges;
	for (int i = 0; i < M; i++) edges.emplace_back(A[i], B[i]);
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < 10; j++) if (i >> j & 1) edges.emplace_back(N + j, i);
	}
	for (int i = 0; i < N; i++) {
		edges.emplace_back(N + 10, i);
	}
	for (int i = 1; 1 < 10; i++) edges.emplace_back(N + i - 1, N + i);
	edges.emplace_back(N + 11, N + 10);
	InitG(N + 12, (int) edges.size());
	for (int i = 0; i < (int) edges.size(); i++) MakeG(i, edges[i].first, edges[i].second);
}

Bob

#include<bits/stdc++.h>

using namespace std;

#include "Alicelib.h"
#include "Boblib.h"

void Bob(int n, int m, int A[], int B[]){
  	vector<vector<int>> g(n);
	for(int i = 0; i < m; i++) {
		g[A[i]].emplace_back(B[i]);
		g[B[i]].emplace_back(A[i]);
	}
  	vector<bool> old(n);
 	int pos;
	for(int i = 0; i < n; i++) if(g[i].size() == 1 && g[g[i][0]].size() == n - 11) {
		pos = g[i][0];
		for(int x : g[pos]) old[x] = 1;
		break;
	}
	int now = pos;
	for(int i = 0; i < n; i++) if(i != pos && !old[i] && g[i].size() <= g[now].size()) now = i;
  	int pre = now;
  	vector<int> id(n);
	for(int i = 9; i >= 0; i--) {
		for(int x : g[now]) if(old[x])
			id[x] += 1 << i;
		for(int x : g[now]) if(!old[x] && x != pre) {
			pre = now, now = x;
			break;
		}
	}
 
	vector<pair<int,int>> edges;
	for(int i = 0; i < m; i++) if(old[A[i]] && old[B[i]]) edges.emplace_back(id[A[i]], id[B[i]]);
	InitMap(n - 12, (int)edges.size());
	for(auto& x : edges) MakeMap(x.first, x.second);
}

Compilation message (stderr)

Bob.cpp: In function 'void Bob(int, int, int*, int*)':
Bob.cpp:16:70: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |  for(int i = 0; i < n; i++) if(g[i].size() == 1 && g[g[i][0]].size() == n - 11) {
      |                                                    ~~~~~~~~~~~~~~~~~~^~~~~~~~~
Bob.cpp:22:52: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   22 |  for(int i = 0; i < n; i++) if(i != pos && !old[i] && g[i].size() <= g[now].size()) now = i;
      |                                ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 15
• Subtask 3: 0 / 63