Submission #791677

#	Time	Username	Problem	Language	Result	Execution time	Memory
791677		Khizri	Stations (IOI20_stations)	C++17	0 / 100	639 ms	688 KiB

stations

#include "stations.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
const int mxn=1010;
int n,tin[mxn],tout[mxn],tmr,color[mxn];
vector<int>vt[mxn];
void dfs(int u,int p,int dep){
    tin[u]=tmr++;
    for(int v:vt[u]){
        if(v!=p){
            dfs(v,u,dep+1);
        }
    }
    tout[u]=tmr++;
    if(dep%2==0){
        color[u]=tin[u]/2;
    }
    else{
        color[u]=tout[u]/2;
    }
}
vector<int> label(int N, int k, vector<int> u, vector<int> v) {
    n=N;
    for(int i=1;i<=n;i++){
        vt[i].clear();
        color[i]=0;
        tin[i]=0;
        tout[i]=0;
    }
    tmr=0;
    for(int i=0;i<u.size();i++){
        vt[u[i]+1].pb(v[i]+1);
        vt[v[i]+1].pb(u[i]+1);
    }
    dfs(1,-1,0);
	vector<int> labels(n);
	for (int i = 0; i < n; i++) {
		labels[i] = color[i+1];
	}
	return labels;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(c[0]>s){
        if(t>c.back()) return c.back();
        auto it=upper_bound(all(c),t);
        it--;
        return *it;
	}
	else{
        if(t>c.back()) return c[0];
        auto it=lower_bound(all(c),t);
        return *it;
	}
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for(int i=0;i<u.size();i++){
      |                 ~^~~~~~~~~

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