Submission #877085

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
877085	2023-11-22T20:33:11 Z	MilosMilutinovic	Toy Train (IOI17_train)	C++14	0 / 100	7 ms	1628 KB

train

#include "train.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
  int n = (int) a.size();
  int m = (int) u.size();
  vector<vector<int>> g(n);
  vector<vector<int>> t(n);
  for (int i = 0; i < m; i++) {
    g[u[i]].push_back(v[i]);
    t[v[i]].push_back(u[i]);
  }
  vector<bool> rem(n);
  auto CalcA = [&](vector<int> f) {
    vector<int> que = f;
    vector<int> deg(n);
    for (int i = 0; i < n; i++) {
      if (rem[i]) {
        continue;
      }
      if (a[i] == 1) {
        deg[i] = (int) g[i].size();
      } else {
        deg[i] = 1;
      }
    }
    for (int x : que) {
      deg[x] = 0;
    }
    for (int b = 0; b < (int) que.size(); b++) {
      int x = que[b];
      for (int y : t[x]) {
        if (deg[y] <= 0) {
          continue;
        }
        deg[y] -= 1;
        if (deg[y] == 0) {
          que.push_back(y);
        }
      }
    }
    return que;
  };
  auto CalcB = [&](vector<int> f) {
    vector<int> que = f;
    vector<int> deg(n);
    for (int i = 0; i < n; i++) {
      if (rem[i]) {
        continue;
      }
      if (a[i] == 1) {
        deg[i] = 1;
      } else {
        deg[i] = (int) g[i].size();
      }
    }
    for (int x : que) {
      deg[x] = 0;
    }
    for (int b = 0; b < (int) que.size(); b++) {
      int x = que[b];
      for (int y : t[x]) {
        if (deg[y] <= 0) {
          continue;
        }
        deg[y] -= 1;
        if (deg[y] == 0) {
          que.push_back(y);
        }
      }
    }
    return que;
  };
  vector<int> ans(n);
  while (true) {
    vector<int> c;
    for (int i = 0; i < n; i++) {
      if (r[i] == 1 && !rem[i]) {
        c.push_back(i);
      }
    }
    vector<int> v = CalcA(c);
    int cnt = 0;
    for (int i = 0; i < n; i++) {
      if (!rem[i]) {
        cnt += 1;
      }
    }
    if (v.size() == cnt) {
      for (int x : v) {
        ans[x] = 1;
      }
      break;
    }
    vector<bool> in(n);
    for (int x : v) {
      in[x] = true;
    }
    vector<int> vec;
    for (int i = 0; i < n; i++) {
      if (!rem[i] && !in[i]) {
        vec.push_back(i);
      }
    }
    vector<int> bad = CalcB(vec);
    for (int x : bad) {
      rem[x] = true;
    }
  }
  return ans;
}

Compilation message

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:91:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   91 |     if (v.size() == cnt) {
      |         ~~~~~~~~~^~~~~~

Subtask #1
0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	4 ms	1276 KB	3rd lines differ - on the 14th token, expected: '1', found: '0'
2	Halted	0 ms	0 KB	-

Subtask #2
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	348 KB	3rd lines differ - on the 8th token, expected: '0', found: '1'
2	Halted	0 ms	0 KB	-

Subtask #3
0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	1628 KB	Output is correct
2	Correct	5 ms	1628 KB	Output is correct
3	Correct	5 ms	1628 KB	Output is correct
4	Incorrect	6 ms	1372 KB	3rd lines differ - on the 1st token, expected: '1', found: '0'
5	Halted	0 ms	0 KB	-