Submission #745170

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
745170	2023-05-19T13:44:41 Z	Desh03	Traffic (IOI10_traffic)	C++17	Compilation error	0 ms	0 KB

traffic

#include <bits/stdc++.h>
using namespace std;

vector<vector<int>> g;
vector<int> sz, a;
int ans = INT_MAX;

void dfs(int u, int p) {
    sz[u] = a[u];
    for (int v : g[u])
        if (v ^ p)
            dfs(v, u), sz[u] += sz[v];
}

void solve(int u, int p) {
    int x = sz[0] - sz[u];
    for (int v : g[u])
        if (v ^ p)
            solve(v, u), x = max(x, sz[v]);
    ans = min(ans, x);
}

int LocateCentre(int n, int p[], int s[], int d[]) {
    g.resize(n);
    a = p;
    for (int i = 0; i < n - 1; i++) {
        g[s[i]].push_back(d[i]);
        g[d[i]].push_back(s[i]);
    }
    dfs(0, 0);
    solve(0, 0);
    return ans;
}

Compilation message

traffic.cpp: In function 'int LocateCentre(int, int*, int*, int*)':
traffic.cpp:25:9: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'int*')
   25 |     a = p;
      |         ^
In file included from /usr/include/c++/10/vector:72,
                 from /usr/include/c++/10/functional:62,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from traffic.cpp:1:
/usr/include/c++/10/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'int*' to 'const std::vector<int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/functional:62,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from traffic.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'int*' to 'std::vector<int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'int*' to 'std::initializer_list<int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~