Submission #420542

#	Time	Username	Problem	Language	Result	Execution time	Memory
420542		SSRS	Split the Attractions (IOI19_split)	C++14	Compilation error	0 ms	0 KiB

split

#include <bits/stdc++.h>
using namespace std;
void dfs(vector<vector<int>> &E, vector<bool> &used, vector<int> &p, int v){
  p.push_back(v);
  for (int w : E[v]){
    if (!used[w]){
      used[w] = true;
      dfs(E, used, p, w);
    }
  }
}
vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q){
  int m = p.size();
  vector<vector<int>> E(n);
  for (int i = 0; i < m; i++){
    E[p[i]].push_back(q[i]);
    E[q[i]].push_back(p[i]);
  }
  for (int i = 0; i < n; i++){
    assert(E[i].size() == 2);
  }
  int s = 0;
  for (int i = 0; i < n; i++){
    if (E[i].size() == 1){
      s = i;
    }
  }
  vector<bool> used(n, false);
  vector<int> p;
  dfs(E, used, p, s);
  vector<int> ans(n);
  for (int i = 0; i < a; i++){
    ans[p[i]] = 1;
  }
  for (int i = a; i < a + b; i++){
    ans[p[i]] = 2;
  }
  for (int i = a + b; i < a + b + c; i++){
    ans[p[i]] = 3;
  }
  return ans;
}

Compilation message (stderr)

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:29:15: error: declaration of 'std::vector<int> p' shadows a parameter
   29 |   vector<int> p;
      |               ^
split.cpp:12:64: note: 'std::vector<int> p' previously declared here
   12 | vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q){
      |                                                    ~~~~~~~~~~~~^