Submission #846923

#	Time	Username	Problem	Language	Result	Execution time	Memory
846923		manhlinh1501	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	Compilation error	0 ms	0 KiB

skyscraper

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

using pii = pair<int, int>;

const int N = 3e4 + 5;
const int oo = 1e9;
const int SQRT = 175;

#define eb emplace_back

struct node {
    int w, u, s;

    node() {
        w = u = s = 0;
    }

    node(int w, int u, int s) : w(w), u(u), s(s) {}

    friend bool operator > (node a, node b) {
        return a.w > b.w;
    }
};

struct data {
    int to, w, cur;
    data() {
        to = w = cur = 0;
    }

    data(int to, int w, int cur) : to(to), w(w), cur(cur) {}
};

int n, m;
int dist[N];
pii a[N];
vector<data> adj[N];
priority_queue<node, vector<node>, greater<node>> Q;

void update(int u, int v, int w, int cur) {
    if(dist[v] > dist[u] + w) {
        dist[v] = dist[u] + w;
        Q.emplace(dist[v], v, cur);
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;

    for(int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;

        for(int j = 1; j * v <= n or j * v <= u; j++)
            adj[u].eb(j * v, j, v);

        a[i] = {u, v};
    }

    for(int i = 0; i < n; i++)
        dist[i] = oo;

    dist[a[0].first] = 0;
    Q.emplace(0, a[0].first, a[0].second);

    while(!Q.empty()) {
        node top = Q.top();
        Q.pop();
        int u = top.u;

        if(top.w != dist[u])
            continue;

        for(auto [v, w, cur] : adj[u]) {
            if(u + v <= n)
                update(u, u + v, w, cur);

            if(u - v >= 0)
                update(u, u - v, w, cur);
        }
    }

    cout << (dist[a[1].first] == oo ? -1 : dist[a[1].first]);
}
/*
5 3
0 2
1 1
4 1
*/

Compilation message (stderr)

skyscraper.cpp:38:12: error: template argument 1 is invalid
   38 | vector<data> adj[N];
      |            ^
skyscraper.cpp:38:12: error: template argument 2 is invalid
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:10:12: error: request for member 'emplace_back' in 'adj[u]', which is of non-class type 'int'
   10 | #define eb emplace_back
      |            ^~~~~~~~~~~~
skyscraper.cpp:59:20: note: in expansion of macro 'eb'
   59 |             adj[u].eb(j * v, j, v);
      |                    ^~
skyscraper.cpp:78:37: error: 'begin' was not declared in this scope
   78 |         for(auto [v, w, cur] : adj[u]) {
      |                                     ^
skyscraper.cpp:78:37: note: suggested alternatives:
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from skyscraper.cpp:1:
/usr/include/c++/10/valarray:1224:5: note:   'std::begin'
 1224 |     begin(const valarray<_Tp>& __va)
      |     ^~~~~
In file included from /usr/include/c++/10/filesystem:46,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:129,
                 from skyscraper.cpp:1:
/usr/include/c++/10/bits/fs_dir.h:549:3: note:   'std::filesystem::__cxx11::begin'
  549 |   begin(recursive_directory_iterator __iter) noexcept
      |   ^~~~~
skyscraper.cpp:78:37: error: 'end' was not declared in this scope
   78 |         for(auto [v, w, cur] : adj[u]) {
      |                                     ^
skyscraper.cpp:78:37: note: suggested alternatives:
In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95,
                 from skyscraper.cpp:1:
/usr/include/c++/10/valarray:1244:5: note:   'std::end'
 1244 |     end(const valarray<_Tp>& __va)
      |     ^~~
In file included from /usr/include/c++/10/filesystem:46,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:129,
                 from skyscraper.cpp:1:
/usr/include/c++/10/bits/fs_dir.h:554:3: note:   'std::filesystem::__cxx11::end'
  554 |   end(recursive_directory_iterator) noexcept
      |   ^~~