Submission #1194553

#TimeUsernameProblemLanguageResultExecution timeMemory
1194553steveonalexTowns (IOI15_towns)C++20
25 / 100
10 ms328 KiB
#include "towns.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned long long ull; #define MASK(i) (1ULL << (i)) #define GETBIT(mask, i) (((mask) >> (i)) & 1) #define ALL(v) (v).begin(), (v).end() ll max(ll a, ll b){return (a > b) ? a : b;} ll min(ll a, ll b){return (a < b) ? a : b;} ll gcd(ll a, ll b){return __gcd(abs(a), abs(b));} ll lcm(ll a, ll b){return abs(a) / gcd(a, b) * abs(b);} ll LASTBIT(ll mask){return (mask) & (-mask);} int pop_cnt(ull mask){return __builtin_popcountll(mask);} int ctz(ull mask){return __builtin_ctzll(mask);} int logOf(ull mask){return 63 - __builtin_clzll(mask);} // mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); mt19937_64 rng(1); ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);} double rngesus_d(double l, double r){ double cur = rngesus(0, MASK(60) - 1); cur /= MASK(60) - 1; return l + cur * (r - l); } template <class T1, class T2> bool maximize(T1 &a, T2 b){ if (a < b) {a = b; return true;} return false; } template <class T1, class T2> bool minimize(T1 &a, T2 b){ if (a > b) {a = b; return true;} return false; } template <class T> void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){ for(auto item: container) out << item << separator; out << finish; } template <class T> void remove_dup(vector<T> &a){ sort(ALL(a)); a.resize(unique(ALL(a)) - a.begin()); } int hubDistance(int n, int subtask){ int dih = 0; int u = 0; for(int i = 1; i < n; ++i) if (maximize(dih, getDistance(0, i))) u = i; int v = 0; dih = 0; vector<int> dih_list(n); for(int i = 0; i < n; ++i) if (i != u) { dih_list[i] = getDistance(i, u); if (maximize(dih, dih_list[i])) v = i; } int ans = 1e9 + 69; for(int i = 0; i < n; ++i) if (i != u && i != v){ int x = dih_list[i], y = getDistance(i, v); int cur = (x - y + dih) / 2; maximize(cur, dih - cur); minimize(ans, cur); } return ans; } // int main(void){ // ios::sync_with_stdio(0);cin.tie(0); cout.tie(0); // clock_t start = clock(); // cerr << "Time elapsed: " << clock() - start << " ms!\n"; // return 0; // }
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