Submission #2095096
Source Code Expand
#include <bits/stdc++.h>
#define ADD(a, b) a = (a + ll(b)) % mod
#define MUL(a, b) a = (a * ll(b)) % mod
#define MAX(a, b) a = max(a, b)
#define MIN(a, b) a = min(a, b)
#define rep(i, a, b) for(int i = int(a); i < int(b); i++)
#define rer(i, a, b) for(int i = int(a) - 1; i >= int(b); i--)
#define all(a) (a).begin(), (a).end()
#define sz(v) (int)(v).size()
#define pb push_back
#define sec second
#define fst first
#define debug(fmt, ...) Debug(__LINE__, ":", fmt, ##__VA_ARGS__)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<int, pi> ppi;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vl> mat;
typedef complex<double> comp;
void Debug() {cout << '\n'; }
template<class FIRST, class... REST>void Debug(FIRST arg, REST... rest){
cout<<arg<<" ";Debug(rest...);}
template<class T>ostream& operator<<(ostream& out,const vector<T>& v) {
out<<"[";if(!v.empty()){rep(i,0,sz(v)-1)out<<v[i]<<", ";out<<v.back();}out<<"]";return out;}
template<class S, class T>ostream& operator<<(ostream& out,const pair<S, T>& v){
out<<"("<<v.first<<", "<<v.second<<")";return out;}
const int MAX_N = 200010;
const int MAX_V = 100010;
const double eps = 1e-6;
const ll mod = 1000000007;
const int inf = 1 << 29;
const ll linf = 1LL << 60;
const double PI = 3.14159265358979323846;
///////////////////////////////////////////////////////////////////////////////////////////////////
typedef pair<pi, double> pd;
int N;
double C[(1 << 15)];
double dp[(1 << 15)];
double X[15], Y[15], cap[15];
int par[MAX_N];
int find(int p) {
if(p == par[p]) return p;
else return par[p] = find(par[p]);
}
double dist(int a, int b) {
double dx = X[a] - X[b], dy = Y[a] - Y[b];
return sqrt(dx * dx + dy * dy);
}
double pre(int bit) {
vector<pd> e;
rep(i, 0, N) {
rep(j, i + 1, N) {
if(!(bit & (1 << i)) || !(bit & (1 << j))) continue;
e.pb(make_pair(pi(i, j), dist(i, j)));
}
}
sort(all(e), [](const pd& p1, const pd& p2){return p1.sec < p2.sec;});
rep(i, 0, N) par[i] = i;
double res = 0;
for(auto p : e) {
int a, b;
tie(a, b) = p.fst;
double d = p.sec;
a = find(a); b = find(b);
if(a != b) {
res -= d;
par[a] = b;
}
}
int cnt = 0;
rep(i, 0, N) {
if(!(bit & (1 << i))) continue;
cnt++;
res += cap[i];
}
return res / cnt;
}
void solve() {
cin >> N;
rep(i, 0, N) cin >> X[i] >> Y[i] >> cap[i];
rep(bit, 1, (1 << N)) {
C[bit] = pre(bit);
}
rep(i, 0, (1 << N)) dp[i] = -inf;
dp[0] = inf;
rep(bit, 0, (1 << N)) {
vector<int> vec;
rep(i, 0, N) {
if(!(bit & (1 << i))) vec.pb(i);
}
int sn = sz(vec);
rep(bit2, 1, (1 << sn)) {
int sbit = 0;
rep(i, 0, N) {
if(!(bit2 & (1 << i))) continue;
sbit |= (1 << vec[i]);
}
dp[bit | sbit] = max(dp[bit | sbit], min(dp[bit], C[sbit]));
}
}
cout << dp[(1 << N) - 1] << "\n";
}
int main() {
#ifndef LOCAL
ios::sync_with_stdio(false);
cin.tie(0);
#endif
cout << fixed;
cout.precision(20);
srand((unsigned int)time(NULL));
#ifdef LOCAL
//freopen("in.txt", "wt", stdout); //for tester
freopen("in.txt", "rt", stdin);
#endif
solve();
#ifdef LOCAL
cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
return 0;
}
Submission Info
Submission Time |
|
Task |
E - Water Distribution |
User |
omochana2 |
Language |
C++14 (GCC 5.4.1) |
Score |
1000 |
Code Size |
3401 Byte |
Status |
AC |
Exec Time |
769 ms |
Memory |
896 KB |
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
1000 / 1000 |
Status |
|
|
Set Name |
Test Cases |
Sample |
example0.txt, example1.txt |
All |
000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, 040.txt, 041.txt, 042.txt, 043.txt, example0.txt, example1.txt |
Case Name |
Status |
Exec Time |
Memory |
000.txt |
AC |
765 ms |
768 KB |
001.txt |
AC |
760 ms |
768 KB |
002.txt |
AC |
763 ms |
768 KB |
003.txt |
AC |
763 ms |
768 KB |
004.txt |
AC |
764 ms |
768 KB |
005.txt |
AC |
760 ms |
768 KB |
006.txt |
AC |
767 ms |
768 KB |
007.txt |
AC |
762 ms |
768 KB |
008.txt |
AC |
764 ms |
768 KB |
009.txt |
AC |
765 ms |
768 KB |
010.txt |
AC |
764 ms |
768 KB |
011.txt |
AC |
764 ms |
768 KB |
012.txt |
AC |
768 ms |
768 KB |
013.txt |
AC |
761 ms |
768 KB |
014.txt |
AC |
768 ms |
768 KB |
015.txt |
AC |
769 ms |
768 KB |
016.txt |
AC |
761 ms |
768 KB |
017.txt |
AC |
767 ms |
768 KB |
018.txt |
AC |
759 ms |
768 KB |
019.txt |
AC |
764 ms |
768 KB |
020.txt |
AC |
755 ms |
768 KB |
021.txt |
AC |
764 ms |
768 KB |
022.txt |
AC |
760 ms |
768 KB |
023.txt |
AC |
743 ms |
768 KB |
024.txt |
AC |
764 ms |
768 KB |
025.txt |
AC |
742 ms |
896 KB |
026.txt |
AC |
748 ms |
768 KB |
027.txt |
AC |
750 ms |
768 KB |
028.txt |
AC |
737 ms |
768 KB |
029.txt |
AC |
734 ms |
768 KB |
030.txt |
AC |
733 ms |
768 KB |
031.txt |
AC |
744 ms |
768 KB |
032.txt |
AC |
731 ms |
768 KB |
033.txt |
AC |
731 ms |
768 KB |
034.txt |
AC |
729 ms |
768 KB |
035.txt |
AC |
731 ms |
768 KB |
036.txt |
AC |
731 ms |
768 KB |
037.txt |
AC |
729 ms |
768 KB |
038.txt |
AC |
730 ms |
768 KB |
039.txt |
AC |
731 ms |
768 KB |
040.txt |
AC |
1 ms |
256 KB |
041.txt |
AC |
1 ms |
256 KB |
042.txt |
AC |
1 ms |
256 KB |
043.txt |
AC |
2 ms |
256 KB |
example0.txt |
AC |
1 ms |
256 KB |
example1.txt |
AC |
761 ms |
768 KB |