Submission #682021

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
682021	2023-01-15 09:14:37	junkbot	Stations (IOI20_stations)	C++14	100 / 100	884 ms	1356 KiB

stations

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
#define D(x...) fprintf(stderr, x)
#define D(x...)
const int MAX_N = 1005;
const int UNLABELLED = -1;
const int PENDING = -2;
struct Solve {
    int upto;
    vector<vector<int>> adjlist;
    vector<int> labels;
    Solve(int n, vector<int> u, vector<int> v) : upto(0), adjlist(n), labels(n) {
        for (auto i=0;i<u.size();i++) {
            adjlist[u[i]].push_back(v[i]);
            adjlist[v[i]].push_back(u[i]);
        }
        fill(labels.begin(), labels.end(), UNLABELLED);
    }
    // label everything in u's subtree.
    void go(int u, bool isPre) {
        if (labels[u] != UNLABELLED) return;
        labels[u] = PENDING;
 
 
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Compilation message (stderr)

stations.cpp:7: warning: "D" redefined
    7 | #define D(x...)
      | 
stations.cpp:6: note: this is the location of the previous definition
    6 | #define D(x...) fprintf(stderr, x)
      | 
stations.cpp: In constructor 'Solve::Solve(int, std::vector<int>, std::vector<int>)':
stations.cpp:19:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (auto i=0;i<u.size();i++) {
      |                       ~^~~~~~~~~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:52:15: warning: unused variable 'l' [-Wunused-variable]
   52 |     for (auto l: solver->labels) {
      |               ^
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:64:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for (auto i=0;i<c.size()-1;i++) {
      |                       ~^~~~~~~~~~~

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