Submission #586023

#	Time	Username	Problem	Language	Result	Execution time	Memory
586023		wdjpng	Stations (IOI20_stations)	C++17	0 / 100	925 ms	636 KiB

stations

#include<bits/stdc++.h>

#include "stations.h"

using namespace std;
#define rep(i,n) for(int i = 0; i<n;i++)

int c;
vector<vector<int>>E;
vector<int>pre;
void dfs(int v, int p)
{
	pre[v]=c++;
	for(int w : E[v]) if(w!=p) dfs(w,v);
}

vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	E.assign(n, vector<int>());
	pre.resize(n);
	c=0;
	rep(i,n-1) {E[u[i]].push_back(v[i]); E[v[i]].push_back(u[i]);}
	dfs(0,-1);

	return pre;
}

int find_next_station(int s, int t, std::vector<int> c) {
	sort(c.begin(),c.end());
	rep(i,c.size()-1) if(c[i+1]>t) return c[i];
	return c[c.size()-1];
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:6:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 | #define rep(i,n) for(int i = 0; i<n;i++)
......
   29 |  rep(i,c.size()-1) if(c[i+1]>t) return c[i];
      |      ~~~~~~~~~~~~                 
stations.cpp:29:2: note: in expansion of macro 'rep'
   29 |  rep(i,c.size()-1) if(c[i+1]>t) return c[i];
      |  ^~~

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