Submission #869678

#	Time	Username	Problem	Language	Result	Execution time	Memory
869678		andrewp	Stations (IOI20_stations)	C++14	0 / 100	1 ms	384 KiB

stations

//Dedicated to my love,ivaziva
#include<bits/stdc++.h>
#include "stations.h"
using namespace std;
#define ll long long 
#define pb push_back 
const int maxn=1050;
const int mx=2000;
const int mod=998244353;  
vector<int> es[maxn]; //ivice
int tin[maxn],tout[maxn];
int vu=0,vi=0;//vreme ulaza, vreme izlaza
void dfs(int u,int par){
    tin[u]=vu++;
    for(auto e:es[u]){
        if(e!=par){
            dfs(e,u);
        }
    }
    tout[u]=vi++;
}   
vector<int> label(int n,int k,vector<int> u,vector<int> v){
    vector<int> kodiraj(n+1,0);
    for(int i=0;i<v.size();i++) u[i]++,v[i]++;//indeksiram od 1
    for(int i=0;i<v.size();i++){
        es[u[i]].pb(v[i]);
        es[v[i]].pb(u[i]);
    }
    vu=0,vi=0;
    dfs(1,-1);
    for(int i=1;i<=n;i++){
        kodiraj[i]=tin[i]*mx+tout[i];//tout[i]<=2k
    }
    return kodiraj;
}
int find_next_station(int s,int e,vector<int> c){
    if(e/mx<s/mx||e%mx>s%mx){
        for(auto p:c){
            if(p/mx<=s/mx) return p;
        }
    }
    for(auto p:c){
        int x=p/mx,y=p%mx;
        if(x>s/mx&&x<=e/mx&&y>=e%mx) return p;
    }
}
// void sol(){      
    
// }
// int main(){
//     int T=1;
//     // scanf("%d",&T);
//     while(T--){
//         sol();
//     }
//     return 0;
// }

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<v.size();i++) u[i]++,v[i]++;//indeksiram od 1
      |                 ~^~~~~~~~~
stations.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type]
   46 | }
      | ^

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