Submission #342479

#	Time	Username	Problem	Language	Result	Execution time	Memory
342479		mjhmjh1104	The Potion of Great Power (CEOI20_potion)	C++14	Compilation error	0 ms	0 KiB

potion

#include <map>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;

map<pair<int, int>, vector<int>> m;
vector<int> adj[100006];
vector<int> h;

void init(int N, int D, int H[]) {
    for (int i = 0; i < N; i++) h.push_back(H[i]);
}

void curseChanges(int U, int A[], int B[]) {
    for (int i = 0; i < U; i++) {
        int a = A[i], b = B[i];
        if (a > b) swap(a, b);
        m[{ a, b }].push_back(i + 1);
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    auto it = m.begin();
    while (it != m.end()) {
        sort(it->second.begin(), it->second.end());
        it = next(it);
    }
}

struct cmp {
    operator() (const int &a, const int &b) const {
        return h[a] < h[b];
    }
};

int question(int x, int y, int v) {
    set<int, cmp> adjX, adjY;
    for (auto &i: adj[x]) {
        int a = x;
        int b = i;
        if (a > b) swap(a, b);
        auto it = m.find({ a, b });
        if (it == m.end()) continue;
        int la = upper_bound(it->second.begin(), it->second.end(), v) - it->second.begin();
        if (la % 2) adjX.insert(i);
    }
    for (auto &i: adj[y]) {
        int a = y;
        int b = i;
        if (a > b) swap(a, b);
        auto it = m.find({ a, b });
        if (it == m.end()) continue;
        int la = upper_bound(it->second.begin(), it->second.end(), v) - it->second.begin();
        if (la % 2) adjY.insert(i);
    }
    if (adjX.empty() || adjY.empty()) return 1e9;
    auto i = adjX.begin();
    auto j = adjY.begin();
    int res = 1e9;
    while (i != adjX.end() && j != adjY.end()) {
        res = min(res, abs(h[*i] - h[*j]));
        if (h[*i] <= h[*j]) i = next(i);
        else j = next(j);
    }
    return res;
}

Compilation message (stderr)

potion.cpp:31:45: error: ISO C++ forbids declaration of 'operator()' with no type [-fpermissive]
   31 |     operator() (const int &a, const int &b) const {
      |                                             ^~~~~
potion.cpp: In function 'int question(int, int, int)':
potion.cpp:37:5: error: 'set' was not declared in this scope
   37 |     set<int, cmp> adjX, adjY;
      |     ^~~
potion.cpp:5:1: note: 'std::set' is defined in header '<set>'; did you forget to '#include <set>'?
    4 | #include <algorithm>
  +++ |+#include <set>
    5 | using namespace std;
potion.cpp:37:9: error: expected primary-expression before 'int'
   37 |     set<int, cmp> adjX, adjY;
      |         ^~~
potion.cpp:45:21: error: 'adjX' was not declared in this scope; did you mean 'adj'?
   45 |         if (la % 2) adjX.insert(i);
      |                     ^~~~
      |                     adj
potion.cpp:54:21: error: 'adjY' was not declared in this scope; did you mean 'adj'?
   54 |         if (la % 2) adjY.insert(i);
      |                     ^~~~
      |                     adj
potion.cpp:56:9: error: 'adjX' was not declared in this scope; did you mean 'adj'?
   56 |     if (adjX.empty() || adjY.empty()) return 1e9;
      |         ^~~~
      |         adj
potion.cpp:56:25: error: 'adjY' was not declared in this scope; did you mean 'adj'?
   56 |     if (adjX.empty() || adjY.empty()) return 1e9;
      |                         ^~~~
      |                         adj
potion.cpp:57:14: error: 'adjX' was not declared in this scope; did you mean 'adj'?
   57 |     auto i = adjX.begin();
      |              ^~~~
      |              adj
potion.cpp:58:14: error: 'adjY' was not declared in this scope; did you mean 'adj'?
   58 |     auto j = adjY.begin();
      |              ^~~~
      |              adj