Submission #750386

#	Time	Username	Problem	Language	Result	Execution time	Memory
750386		mohav48173	Stations (IOI20_stations)	C++14	100 / 100	961 ms	788 KiB

stations

#include "stations.h"///15:49
#include<bits/stdc++.h>
using namespace std;
vector<int>cur;
vector<int>a[1001];
int counter;
void dfs(int n,int par=-1,int depth=0) {
    if(depth%2==0)cur[n]=counter++;
    for(int i:a[n]) {
        if(i!=par)dfs(i,n,depth+1);
    }
    if(depth%2==1)cur[n]=counter++;
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    cur=vector<int>(n,0);
    for(int i=0;i<n;i++){a[i].clear();}
    counter=0;
    for(int i=0;i<n-1;i++) {
        a[u[i]].push_back(v[i]);
        a[v[i]].push_back(u[i]);
    }
    dfs(0);
    return cur;
}

int find_next_station(int s, int t, vector<int> c) {
    if(c.size()==1)return c[0];
    int par=-1;
    if(s<c[0])par=c[c.size()-1];
    else par=c[0];
    c.erase(find(c.begin(),c.end(),par));
    if(par<s) {
        if(t>s || t<c[0])return par;
        for(int i=0;i<c.size();i++) {
            if(i==c.size()-1 || c[i+1]>t)return c[i];
        }
    } else {
        if(t<s || t>c[c.size()-1])return par;
        for(int i=0;i<c.size();i++) {
            if(t<=c[i])return c[i];
        }
    }
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:34:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(int i=0;i<c.size();i++) {
      |                     ~^~~~~~~~~
stations.cpp:35:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |             if(i==c.size()-1 || c[i+1]>t)return c[i];
      |                ~^~~~~~~~~~~~
stations.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i=0;i<c.size();i++) {
      |                     ~^~~~~~~~~
stations.cpp:43:1: warning: control reaches end of non-void function [-Wreturn-type]
   43 | }
      | ^

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