This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "game.h"
#include <bits/stdc++.h>
using namespace std;
template<typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;
using int64 = long long;
using ld = long double;
constexpr int kInf = 1e9 + 10;
constexpr int64 kInf64 = 1e15 + 10;
constexpr int kMod = 1e9 + 7;
class dsu {
int n;
std::vector<int> e;
int pfind(const int x) {
return (e[x] < 0 ? x : e[x] = pfind(e[x]));
}
public:
dsu() : n(0), comp(0) {}
explicit dsu(const int n) : n(n), comp(n), e(n, -1) {}
int comp;
int find(const int x) {
assert(0 <= x and x < n);
return pfind(x);
}
bool unite(int x, int y) {
x = find(x), y = find(y);
if (x == y) return false;
if (e[x] > e[y]) swap(x, y);
e[x] += e[y];
e[y] = x;
comp--;
return true;
}
bool same(const int x, const int y) {
return (find(x) == find(y));
}
int size(const int x) {
return -e[find(x)];
}
std::vector<std::vector<int>> components() {
std::vector<std::vector<int>> res(n);
for (int x = 0; x < n; x++) {
res[pfind(x)].push_back(x);
}
res.erase(
std::remove_if(res.begin(), res.end(), [&](const std::vector<int> &v) { return v.empty(); }),
res.end());
return res;
}
};
int n;
dsu d;
set<int> leaders;
vector<map<int, int>> edges;
void initialize(const int N) {
n = N;
d = dsu(n);
for (int x = 0; x < n; x++) {
leaders.insert(x);
}
edges = vector<map<int, int>>(n);
}
int hasEdge(int x, int y) {
x = d.find(x);
y = d.find(y);
edges[x][y]++, edges[y][x]++;
const int cur = edges[x][y];
const int req = d.size(x) * d.size(y);
if (cur == req) {
d.unite(x, y);
if (x != d.find(x)) swap(x, y);
leaders.erase(y);
for (const int z : leaders) {
edges[x][z] += edges[y][z];
edges[z][x] += edges[z][y];
edges[z].erase(y);
}
}
return (cur == req);
}
Compilation message (stderr)
game.cpp: In constructor 'dsu::dsu(int)':
game.cpp:29:7: warning: 'dsu::comp' will be initialized after [-Wreorder]
29 | int comp;
| ^~~~
game.cpp:19:20: warning: 'std::vector<int> dsu::e' [-Wreorder]
19 | std::vector<int> e;
| ^
game.cpp:27:12: warning: when initialized here [-Wreorder]
27 | explicit dsu(const int n) : n(n), comp(n), e(n, -1) {}
| ^~~
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