Submission #772592

#	Time	Username	Problem	Language	Result	Execution time	Memory
772592		khshg	Stations (IOI20_stations)	C++14	0 / 100	721 ms	508 KiB

stations

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

vector<vector<int>> adj;

vector<int> label(int N, int K, vector<int> u, vector<int> v) {
	vector<int> labels(N); iota(begin(labels), end(labels), 0);
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	vector<int> S, T;
	int start = s, target = t;
	while(s > 0) {
		S.push_back(s);
		s >>= 1;
	}
	S.push_back(0);
	while(t > 0) {
		T.push_back(t);
		t >>= 1;
	}
	T.push_back(0);
	int LCA = -1;
	while((int)S.size() && (int)T.size() && S.back() == T.back()) {
		LCA = S.back();
		S.pop_back();
		T.pop_back();
	}
	if(LCA == start) {
		return T.back();
	}
	return LCA / 2;
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:14:17: warning: unused variable 'target' [-Wunused-variable]
   14 |  int start = s, target = t;
      |                 ^~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61