Submission #529561

#	Time	Username	Problem	Language	Result	Execution time	Memory
529561		pokmui9909	Stations (IOI20_stations)	C++17	0 / 100	3068 ms	2097156 KiB

stations

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

ll in[1005], out[1005];
vector<ll> T[1005];
ll num = 0;
void dfs(ll u, ll p){
    in[u] = ++num;
    for(auto v : T[u]){
        if(v == p) continue;
        dfs(v, u);
    }
    out[u] = num;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	for(int i = 0; i < n - 1; i++){
		T[u[i]].push_back(v[i]);
		T[v[i]].push_back(u[i]);
	}
	dfs(0, -1);
	vector<int> L(n);
	for(int i = 0; i < n; i++){
		L[i] = in[i] * 1000 + out[i];
	}
	return L;
}
int find_next_station(int s, int t, std::vector<int> c) {
	ll ls = s / 1000, rs = s % 1000, lt = t / 1000, rt = t % 1000;
	for(int i = 0; i < c.size(); i++){
		ll k = c[i];
		ll lk = k / 1000, rk = k % 1000;
		if(lk <= lt && rt <= rk) return k;
	}
	return -1;
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |  for(int i = 0; i < c.size(); i++){
      |                 ~~^~~~~~~~~~
stations.cpp:30:5: warning: unused variable 'ls' [-Wunused-variable]
   30 |  ll ls = s / 1000, rs = s % 1000, lt = t / 1000, rt = t % 1000;
      |     ^~
stations.cpp:30:20: warning: unused variable 'rs' [-Wunused-variable]
   30 |  ll ls = s / 1000, rs = s % 1000, lt = t / 1000, rt = t % 1000;
      |                    ^~

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