C++ lambda function error, while implementing dfs (closed)

Правка en9, от angry_pikachu, 2022-09-15 21:07:52

I am getting error

prog.cpp: In lambda function:

prog.cpp:118:28: error: use of ‘dfs’ before deduction of ‘auto’

118 | for(ll it: nde[i]) dfs(it,fren[i]);

In this code , ll means long long, nde[i] is a vector of int

auto dfs = [&](int i,int x)->void{
        fren[i]+=x;
        for(ll it: nde[i]) dfs(it,fren[i]);
    };
dfs(0,0);

Writing a blog in codeforces for first time

C++ 17 online compiler

Worked using

    function<void(int, int)> dfs = [&](int i, int x) -> void {
        fren[i] += x;
        for (ll it : nde[i])
            dfs(it, fren[i]);
};

Also by changing vector<int> nde[n] to vector<vector<int>> nde(n) and by using the function

    auto dfs = [&](int i,int x, auto &&dfs)->void{
        fren[i]+=x;
        for(ll it: nde[i]) dfs(it,fren[i], dfs);
    };
    dfs(0,0,dfs);

История

 
 
 
 
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  Rev. Язык Кто Когда Δ Комментарий
en9 Английский angry_pikachu 2022-09-15 21:07:52 320
en8 Английский angry_pikachu 2022-09-15 21:04:11 304
en7 Английский angry_pikachu 2022-09-15 20:05:12 27 Tiny change: 'ime \n\n\n\n\n' -> 'ime \n\n\nC++ 17 online compiler \n\n\n\n'
en6 Английский angry_pikachu 2022-09-15 19:49:09 17 Reverted to en4
en5 Английский angry_pikachu 2022-09-15 19:49:01 17 Reverted to en2
en4 Английский angry_pikachu 2022-09-15 19:48:38 16
en3 Английский angry_pikachu 2022-09-15 19:46:32 1 Tiny change: ' long long \nnde[i] ' -> ' long long, \nnde[i] '
en2 Английский angry_pikachu 2022-09-15 19:46:03 11 Tiny change: ' of int \n`\nauto ' -> ' of int \n\n\n\n\n\n`\nauto '
en1 Английский angry_pikachu 2022-09-15 19:45:06 479 Initial revision (published)