Submission #306110

#	Time	Username	Problem	Language	Result	Execution time	Memory
306110		SorahISA	Stations (IOI20_stations)	C++17	8 / 100	1047 ms	1012 KiB

stations

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

using pii = pair<int, int>;
template<typename T>
using Prior = priority_queue<T>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;

#define X first
#define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    vector<int> lab(n);
    
    iota(ALL(lab), 1);
    
	return lab;
}

int find_next_station(int s, int t, vector<int> c) {
    if (s > t or s != (t >> __lg(t) - __lg(s))) return s / 2;
    return c[((t >> __lg(t) - __lg(s) - 1) & 1) + (s != 1)];
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:26:37: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   26 |     if (s > t or s != (t >> __lg(t) - __lg(s))) return s / 2;
      |                             ~~~~~~~~^~~~~~~~~
stations.cpp:27:39: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   27 |     return c[((t >> __lg(t) - __lg(s) - 1) & 1) + (s != 1)];
      |                     ~~~~~~~~~~~~~~~~~~^~~

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