Submission #955369

#TimeUsernameProblemLanguageResultExecution timeMemory
955369vjudge1IOI Fever (JOI21_fever)C++17
0 / 100
1 ms452 KiB
// #pragma GCC target("avx2") // #pragma GCC optimize("O3") // #include <x86intrin.h> #include <bits/stdc++.h> #include <chrono> #include <random> // @author: Vlapos namespace operators { template <typename T1, typename T2> std::istream &operator>>(std::istream &in, std::pair<T1, T2> &x) { in >> x.first >> x.second; return in; } template <typename T1, typename T2> std::ostream &operator<<(std::ostream &out, std::pair<T1, T2> x) { out << x.first << " " << x.second; return out; } template <typename T1> std::istream &operator>>(std::istream &in, std::vector<T1> &x) { for (auto &i : x) in >> i; return in; } template <typename T1> std::ostream &operator<<(std::ostream &out, std::vector<T1> &x) { for (auto &i : x) out << i << " "; return out; } template <typename T1> std::ostream &operator<<(std::ostream &out, std::set<T1> &x) { for (auto &i : x) out << i << " "; return out; } } // name spaces using namespace std; using namespace operators; // end of name spaces // defines #define ll long long #define ull unsigned long long #define pb push_back #define mp make_pair #define pii pair<int, int> #define pll pair<ll, ll> #define f first #define s second #define uint unsigned int #define all(vc) vc.begin(), vc.end() // end of defines // usefull stuff void boost() { ios_base ::sync_with_stdio(false); cin.tie(0); cout.tie(0); } inline int getbit(int &x, int &bt) { return (x >> bt) & 1; } const int dx4[4] = {-1, 0, 0, 1}; const int dy4[4] = {0, -1, 1, 0}; const int dx8[8] = {-1, -1, -1, 0, 0, 1, 1, 1}; const int dy8[8] = {-1, -0, 1, -1, 1, -1, 0, 1}; const ll INF = (1e17) + 500; const int BIG = (1e9) * 2 + 100; const int MAXN = (1e5) + 5; const int MOD7 = (1e9) + 7; const int MOD9 = (1e9) + 9; const uint MODFFT = 998244353; #define int ll struct test { map<int, vector<pair<int, pii>>> d1, d2; vector<int> isDeleted; int cnt = 0; void dfs(int x, int y, int id) { cnt++; isDeleted[id] = 1; while (d1[x + y].size()) { if (isDeleted[d1[x + y].back().f]) d1[x + y].pop_back(); else { auto [nid, c] = d1[x + y].back(); dfs(c.f, c.s, nid); } } while (d2[x - y].size()) { if (isDeleted[d2[x - y].back().f]) d2[x - y].pop_back(); else { auto [nid, c] = d2[x - y].back(); dfs(c.f, c.s, nid); } } } void solve(int testcase) { boost(); int n; cin >> n; pii st; isDeleted.resize(n); for (int i = 0; i < n; ++i) { int x, y; cin >> x >> y; d1[x + y].pb({i, {x, y}}); d2[x - y].pb({i, {x, y}}); if (!i) st = {x, y}; } dfs(st.f, st.s, 0); cout << cnt << '\n'; } }; main() { boost(); int q = 1; // cin >> q; for (int i = 0; i < q; i++) { test t; t.solve(i); } return 0; } //[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]// // // // Coded by Der_Vlἀpos // // // //[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]//

Compilation message (stderr)

fever.cpp:149:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  149 | main()
      | ^~~~
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