Submission #824554

#TimeUsernameProblemLanguageResultExecution timeMemory
824554arush_aguStar triangles (IZhO11_triangle)C++17
100 / 100
320 ms25360 KiB
#include <algorithm> #include <cctype> #include <cmath> #include <cstdio> #include <cstring> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #include <functional> #include <iomanip> #include <iostream> #include <iterator> #include <list> #include <map> #include <numeric> #include <queue> #include <random> #include <set> #include <sstream> #include <stack> #include <string> #include <unordered_map> #include <unordered_set> #include <vector> #ifdef DEBUG #include <time.h> #endif #define all(a) (a).begin(), (a).end() #define rev(a) (a).rbegin(), (a).rend() #define F first #define S second int recur_depth = 0; #ifdef DEBUG #define dbg(x) \ { \ ++recur_depth; \ auto x_ = x; \ --recur_depth; \ cerr << string(recur_depth, '\t') << "\e[91m" << __func__ << ":" \ << __LINE__ << "\t" << #x << " = " << x_ << "\e[39m" << endl; \ } #else #define dbg(x) #endif using namespace std; using namespace __gnu_pbds; typedef pair<int, int> ii; typedef long long ll; typedef long double ld; typedef pair<ll, ll> llll; typedef vector<int> vi; typedef vector<vi> vvi; typedef vector<pair<int, int>> vii; typedef vector<vii> vvii; typedef vector<ll> vl; typedef vector<vl> vvl; typedef vector<pair<ll, ll>> vll; typedef vector<vll> vvll; typedef vector<bool> vb; template <class type1> using ordered_set = tree<type1, null_type, less<type1>, rb_tree_tag, tree_order_statistics_node_update>; template <typename A, typename B> ostream &operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; } template <typename T_container, typename T = typename enable_if< !is_same<T_container, string>::value, typename T_container::value_type>::type> ostream &operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; } const ll MOD = 1e9 + 7; // const ll MOD = 998244353; const ll INF = 1e9; const ld EPS = 1e-9; void solve() { int n; cin >> n; vll a(n); for (auto &[x, y] : a) cin >> x >> y; sort(all(a)); map<ll, vl> by_x, by_y; for (auto &[x, y] : a) by_y[y].push_back(x); sort(all(a), [&](llll a, llll b) { return llll{a.second, a.first} < llll{b.second, b.first}; }); for (auto &[x, y] : a) by_x[x].push_back(y); ll res = 0; for (auto &[x, y] : a) res += ((ll)by_x[x].size() - 1) * ((ll)by_y[y].size() - 1); cout << res << '\n'; } int main() { ios_base::sync_with_stdio(0); cin.tie(NULL); clock_t start = clock(); int test_cases = 1; // cin >> test_cases; while (test_cases--) solve(); #ifdef DEBUG cerr << fixed << setprecision(10) << "\nTime Taken: " << (double)(clock() - start) / CLOCKS_PER_SEC << "s\n"; #endif return 0; }

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:119:11: warning: unused variable 'start' [-Wunused-variable]
  119 |   clock_t start = clock();
      |           ^~~~~
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