Submission #418313

#TimeUsernameProblemLanguageResultExecution timeMemory
418313acmDrzava (COCI15_drzava)C++14
16 / 160
1085 ms4568 KiB
#include <bits/stdc++.h> #define speed \ ios_base::sync_with_stdio(0); \ cin.tie(0); \ cout.tie(0); #define precision \ cout.precision(30); \ cerr.precision(10); #define ll long long #define ld long double #define pll pair<ll, ll> #define pii pair<int, int> #define forn(n) for (int i = 1; i <= n; i++) #define forlr(l, r) for (int i = l; i != r; (l > r ? i-- : i++)) #define pb(x) push_back(x) #define sz(x) (int)x.size() #define mp(x, y) make_pair(x, y) #define all(x) x.begin(), x.end() #define pc(x) __builtin_popcount(x) #define pcll(x) __builtin_popcountll(x) #define F first #define S second using namespace std; mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); void ioi(string name) { freopen((name + ".in").c_str(), "r", stdin); freopen((name + ".out").c_str(), "w", stdout); } ll n, k, d = (1LL << 60), a[50005], b[50005], c[50005]; int main() { speed; precision; // code cin >> n >> k; for (int i = 1; i <= n; i++) { cin >> a[i] >> b[i] >> c[i]; } for (int i = 1; i <= n; i++) { vector<pair<ll, int>> v; v.pb(mp(0, i)); for (int j = 1; j <= n; j++) { if (i == j) continue; v.pb(mp(abs(a[i] - a[j]) * abs(a[i] - a[j]) + abs(b[i] - b[j]) * abs(b[i] - b[j]), j)); } sort(all(v)); while (sz(v) > k) v.pop_back(); int l = 0, r = sz(v) - 1; while (l != r) { int tm = (l + r) / 2; int ok = 0; bitset<32> dp, pd; for (int j = 0; j < k; j++) pd[j] = 1; dp[0] = 1; for (int j = 0; j <= tm; j++) { int x = c[v[j].S]; dp |= (dp << (x % k)); if (dp[k] || !(x % k)) { ok = 1; break; } dp |= (dp >> k); dp &= pd; } if (ok) r = tm; else l = tm + 1; } d = min(d, v[l].F); } cout << fixed << setprecision(3) << sqrt(d) << "\n"; // endl #ifndef ONLINE_JUDGE cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n"; #endif return 0; }

Compilation message (stderr)

drzava.cpp: In function 'void ioi(std::string)':
drzava.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drzava.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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