Submission #1009941

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009941		dimashhh	Stations (IOI20_stations)	C++17	0 / 100	618 ms	684 KiB

stations

#include <bits/stdc++.h>
using namespace std;
const int N = 1e3 + 12;
vector<int> g[N];
int timer = 0,tin[N],tout[N],dd[N];
void dfs(int v,int pr = -1,int depth = 0){
    tin[v] = ++timer;
    dd[v] = depth;
    for(int to:g[v]){
        if(to == pr) continue;
        dfs(to,v,depth+1);
    }
    tout[v] = ++timer;
}
vector<int> label(int n, int k,vector<int> u,vector<int> v){
    vector<int> lab(n);
    timer = 0;
    for(int i = 0;i < n;i++){
        g[i].clear();
    }
    for(int i = 0;i < n - 1;i++){
        g[u[i]].push_back(v[i]);
        g[v[i]].push_back(u[i]);
    }
    dfs(0);
    for(int i = 0;i < n;i++){
        if(dd[i] & 1){
            lab[i] = tout[i];
        }else{
            lab[i] = tin[i];
        }
        // cout << i << ' ' << 
    }
    return lab;
}
int find_next_station(int s, int t,vector<int> c){
    if((int)c.size() == 1){
        return c[0];
    }
    int m = (int)c.size();
    bool is_tin = false;
    if(s < c[0]){
        is_tin = 1;
    }
    if(is_tin){
        for(int i = 0;i < m - 1;i++){
            int ti = s + 1;
            if(i){
                ti = c[i - 1] + 1;
            }
            if(t >= i && t <= c[i]){
                return c[i];
            }
        }
        return c.back();
    }else{
        for(int i = 1;i < m;i++){
            int ti = c[i],to = s - 1;
            if(i + 1 < m){
                to = c[i + 1] - 1;
            }
            if(t >= ti && t <= to){
                return c[i];
            }
        }
        return c[0];
    }
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:47:17: warning: variable 'ti' set but not used [-Wunused-but-set-variable]
   47 |             int ti = s + 1;
      |                 ^~

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