Language: C++

#include <bits/stdc++.h>

using namespace std;
const int MAXN = 100000 + 10;
typedef long long ll;
vector<int> q[MAXN];
int color[MAXN];
int flag[MAXN];
int n, m, q;
int v[MAXN], d[MAXN], c[MAXN];
void dfs(int x, int cnt, int c)
{
	if (!color[x])
		color[x] = c;
	if (flag[x] >= cnt)
		return;
	if (cnt == 0)
		return;
	flag[x] = cnt;
	for (int i = 0; i < q[x].size(); i++)
		dfs(q[x][i], cnt - 1, c);
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= m; i++)
	{
		int x, y;
		cin >> x >> y;
		q[x].push_back(y);
		q[y].push_back(x);
	}
	
	cin >> q;
	for (register int i = 1; i <= q; i++)
		cin >> v[i] >> d[i] >> c[i];
	for (register int i = q; i >= 1; i--)
		dfs(v[i], d[i], c[i]);
	for (register int i = 1; i <= n; i++)
		cout << color[i] << "\n";
	return 0;
}

Compiler output:
a.cc:9:11: error: conflicting declaration 'int q'
    9 | int n, m, q;
      |           ^
a.cc:6:13: note: previous declaration as 'std::vector<int> q [100010]'
    6 | vector<int> q[MAXN];
      |             ^
a.cc: In function 'int main()':
a.cc:36:13: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::vector<int> [100010]')
   36 |         cin >> q;
      |         ~~~ ^~ ~
      |         |      |
      |         |      std::vector<int> [100010]
      |         std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'std::vector<int>*'
   36 |         cin >> q;
      |                ^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'short int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(short int)((std::vector<int>*)(& q))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'short unsigned int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(short unsigned int)((std::vector<int>*)(& q))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(int)((std::vector<int>*)(& q))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'unsigned int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(unsigned int)((std::vector<int>*)(& q))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'long int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(long int)((std::vector<int>*)(& q))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'long unsigned int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(long unsigned int)((std::vector<int>*)(& q))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'long long int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(long long int)((std::vector<int>*)(& q))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: invalid conversion from 'std::vector<int>*' to 'long long unsigned int' [-fpermissive]
   36 |         cin >> q;
      |                ^
      |                |
      |                std::vector<int>*
a.cc:36:16: error: cannot bind rvalue '(long long unsigned int)((std::vector<int>*)(& q))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:36:16: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
   36 |         cin >> q;
      |                ^
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:25: note:   no known conversion for argument 1 from 'std::vector<int> [100010]' to 'float&'
  219 |       operator>>(float& __f)
      |                  ~~~~~~~^~~
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:26: note:   no known conversion for argument 1 from 'std::vector<int> [100010]' to 'double&'
  223 |       operator>>(double& __f)
      |                  ~~~~~~~~^~~
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:31: note:   no known conversion for argument 1 from 'std::vector<int> [100010]' to 'long double&'
  227 |       operator>>(long double& __f)
      |                  ~~~~~~~~~~~~~^~~
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:36: note:   no known conversion for argument 1 from 'std::vector<int> [100010]' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'}
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |                  ~~~~~~~~~