oj.uz

Submission #289025

# Submission time Handle Problem Language Result Execution time Memory
289025 2020-09-02T09:39:11 Z AlexLuchianov Toy Train (IOI17_train) C++14
11 / 100
 11 ms 1668 KB 
#include "train.h"
#include <queue>
#include <iostream>

std::vector<std::vector<int>> g, depend;

int refresh(int node, std::vector<int> &own, std::vector<int> &state) {
  if(own[node] == 1) {
    for(int h = 0; h < g[node].size();h ++) {
      int to = g[node][h];
      if(state[to] == 1)
        return 1;
    }
    return 0;
  } else {
    for(int h = 0; h < g[node].size(); h++) {
      int to = g[node][h];
      if(state[to] == 0)
        return 0;
    }
    return 1;
  }
}

std::vector<int> first_phase(std::vector<int> own, std::vector<int> r) {
  int n = own.size();
  std::vector<int> state(n);
  std::queue<int> q;
  for(int i = 0; i < n; i++)
    if(r[i] == 1) {
      state[i] = 1;
      q.push(i);
    }

  while(0 < q.size()) {
    int node = q.front();
    q.pop();
    for(int h = 0; h < depend[node].size(); h++) {
      int to = depend[node][h];
      if(state[to] == 0) {
        state[to] = refresh(to, own, state);
        if(state[to] == 1)
          q.push(to);
      }
    }
  }
  return state;
}

int refresh2(int node, std::vector<int> &own, std::vector<int> &state) {

  if(own[node] == 1) {
    for(int h = 0; h < g[node].size(); h++) {
      int to = g[node][h];
      if(state[to] == 0)
        return 0;
    }
    return 1;
  } else {
    for(int h = 0; h < g[node].size(); h++) {
      int to = g[node][h];
      if(state[to] == 1)
        return 1;
    }
    return 0;
  }
}

std::vector<int> second_phase(std::vector<int> &own, std::vector<int> &init) {
  int n = own.size();
  std::vector<int> state(own.size());
  std::queue<int> q;
  for(int i = 0; i < n; i++)
    if(init[i] == 0) {
      state[i] = 1;
      q.push(i);
    }
  while(0 < q.size()) {
    int node = q.front();
    q.pop();
    for(int h = 0; h < depend[node].size(); h++) {
      int to = depend[node][h];
      if(state[to] == 0) {
        state[to] = refresh2(to, own, state);
        if(state[to] == 1) {
          q.push(to);
        }
      }
    }
  }
  
  return state;

}

std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
  
  std::vector<int> res(a.size());
  int n = a.size();
  g.clear();
  depend.clear();
  g.resize(n);
  depend.resize(n);
  for(int i = 0; i < u.size(); i++) {
    g[u[i]].push_back(v[i]);
    depend[v[i]].push_back(u[i]);
  }
  std::vector<int> state = first_phase(a, r); 
  
  std::vector<int> state2 = second_phase(a, state);
  for(int i = 0; i < n; i++)
    res[i] = !state2[i];
  return res;
}

Compilation message

train.cpp: In function 'int refresh(int, std::vector<int>&, std::vector<int>&)':
train.cpp:9:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int h = 0; h < g[node].size();h ++) {
      |                    ~~^~~~~~~~~~~~~~~~
train.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int h = 0; h < g[node].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~
train.cpp: In function 'std::vector<int> first_phase(std::vector<int>, std::vector<int>)':
train.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int h = 0; h < depend[node].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~~~~~~
train.cpp: In function 'int refresh2(int, std::vector<int>&, std::vector<int>&)':
train.cpp:53:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for(int h = 0; h < g[node].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~
train.cpp:60:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |     for(int h = 0; h < g[node].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~
train.cpp: In function 'std::vector<int> second_phase(std::vector<int>&, std::vector<int>&)':
train.cpp:81:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     for(int h = 0; h < depend[node].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~~~~~~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:104:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |   for(int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1152 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 1 ms 384 KB 3rd lines differ - on the 4th token, expected: '0', found: '1'
5 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 1536 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
2 Halted 0 ms 0 KB -

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 1280 KB Output is correct
2 Correct 9 ms 1536 KB Output is correct
3 Correct 10 ms 1664 KB Output is correct
4 Correct 10 ms 1664 KB Output is correct
5 Correct 10 ms 1668 KB Output is correct
6 Correct 10 ms 1664 KB Output is correct
7 Correct 10 ms 1664 KB Output is correct
8 Correct 9 ms 1664 KB Output is correct
9 Correct 9 ms 1536 KB Output is correct
10 Correct 10 ms 1664 KB Output is correct
11 Correct 10 ms 1664 KB Output is correct
12 Correct 10 ms 1664 KB Output is correct
13 Correct 10 ms 1664 KB Output is correct
14 Correct 9 ms 1536 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 1408 KB Output is correct
2 Correct 10 ms 1664 KB Output is correct
3 Correct 11 ms 1664 KB Output is correct
4 Correct 10 ms 1536 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 5 ms 1152 KB Output is correct
7 Correct 7 ms 1024 KB Output is correct
8 Incorrect 7 ms 1024 KB 3rd lines differ - on the 5th token, expected: '0', found: '1'
9 Halted 0 ms 0 KB -

Subtask #6
0 / 51.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 1152 KB 3rd lines differ - on the 1st token, expected: '0', found: '1'
2 Halted 0 ms 0 KB -