Submission #769505

#	Time	Username	Problem	Language	Result	Execution time	Memory
769505		Ellinor	Tracks in the Snow (BOI13_tracks)	C++14	Compilation error	0 ms	0 KiB

tracks

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

#define rep(i,a,b) for(int i = (a); i < (b); i++)
typedef long long ll;

int H, W;
vector<string> grid;

vector<vector<bool>> visited; // bitset ?
vector<vector<ll>> dp;

priority_queue<vector<ll>> q;

void dfs(int hat, int wat, ll num)
{
    if (visited[hat][wat]>0) return;
    if (grid[hat][wat] == '.') return;
    visited[hat][wat] = num;

    char ch = grid[hat][wat];
    if (hat + 1 < H) {
        if (grid[hat + 1][wat] == ch) q.push({-num, hat + 1, wat});
        else q.push({-(num + 1), hat + 1, wat});
    }
    if (wat + 1 < W) {
        if (grid[hat][wat + 1] == ch) q.push({-num, hat, wat + 1});
        else q.push({-(num + 1), hat, wat + 1});
    }
    if (hat - 1 >= 0) {
        if (grid[hat - 1][wat] == ch) q.push({-num, hat - 1, wat});
        else q.push({-(num + 1), hat - 1, wat});
    }
    if (wat - 1 >= 0) {
        if (grid[hat][wat - 1] == ch) q.push({-num, hat, wat - 1});
        else q.push({-(num + 1), hat, wat - 1});
    }
}

int32_t main()
{
    cin>>H>>W;
    grid.assign(H, "");
    rep(i,0,H){
        cin>>grid[i];
    }

    visited.assign(H, vector<bool>(W, false));
    dp.assign(H, vector<ll>(W, 0));
    q.push({-1,0,0});
    while(!q.empty())
    {
        vector<ll> x = q.top();
        q.pop();
        dfs(x[1], x[2], -(x[0]));
    }

    ll ans = 1;
    rep(i,0,H){
        rep(j,0,W){
            ans = max(ans, visited[i][j]);
        }
    }
    cout << ans;
}

Compilation message (stderr)

tracks.cpp: In function 'int32_t main()':
tracks.cpp:61:41: error: no matching function for call to 'max(ll&, std::vector<bool>::reference)'
   61 |             ans = max(ans, visited[i][j]);
      |                                         ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from tracks.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
tracks.cpp:61:41: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'std::vector<bool>::reference')
   61 |             ans = max(ans, visited[i][j]);
      |                                         ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from tracks.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
tracks.cpp:61:41: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'std::vector<bool>::reference')
   61 |             ans = max(ans, visited[i][j]);
      |                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from tracks.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
tracks.cpp:61:41: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   61 |             ans = max(ans, visited[i][j]);
      |                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from tracks.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
tracks.cpp:61:41: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   61 |             ans = max(ans, visited[i][j]);
      |                                         ^