Submission #1005311


Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))
#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))
static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL;
typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll;
template<typename T, typename U> static void amin(T &x, U y) { if(y < x) x = y; }
template<typename T, typename U> static void amax(T &x, U y) { if(x < y) x = y; }

struct City {
	int x, y, a;
};

int main() {
	int N;
	while(~scanf("%d", &N)) {
		vector<City> cities(N);
		rep(i, N) {
			int x; int y; int a;
			scanf("%d%d%d", &x, &y, &a);
			cities[i] = { x, y, a };
		}
		vector<vector<double>> dist(N, vector<double>(N));
		rep(i, N) rep(j, N)
			dist[i][j] = hypot(cities[i].x - cities[j].x, cities[i].y - cities[j].y);
		vector<double> mstCost(1 << N, 1e99);
		rep(i, N) mstCost[1 << i] = 0;
		reu(S, 1, (1 << N) - 1) {
			double x = mstCost[S];
			rep(i, N) if(S >> i & 1) rep(j, N) if(~S >> j & 1)
				amin(mstCost[S | 1 << j], x + dist[i][j]);
		}
		vector<double> value(1 << N);
		reu(S, 1, 1 << N) {
			double A = 0;
			int K = 0;
			rep(i, N) if(S >> i & 1) {
				A += cities[i].a;
				++ K;
			}
			value[S] = max(0., A - mstCost[S]) / K;
		}
		vector<double> dp(1 << N);
		dp[0] = 1e99;
		reu(S, 1, 1 << N) {
			double x = 0;
			for(int T = S; T > 0; (-- T) &= S)
				amax(x, min(value[T], dp[S - T]));
			dp[S] = x;
		}
		double ans = dp.back();
		printf("%.10f\n", ans);
	}
	return 0;
}

Submission Info

Submission Time
Task E - Water Distribution
User anta
Language C++14 (GCC 5.4.1)
Score 1000
Code Size 1676 Byte
Status AC
Exec Time 41 ms
Memory 1152 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d%d", &x, &y, &a);
                               ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1000 / 1000
Status
AC × 2
AC × 46
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 41 ms 1024 KB
001.txt AC 41 ms 1024 KB
002.txt AC 41 ms 1024 KB
003.txt AC 41 ms 1024 KB
004.txt AC 41 ms 1024 KB
005.txt AC 41 ms 1024 KB
006.txt AC 41 ms 1024 KB
007.txt AC 41 ms 1024 KB
008.txt AC 41 ms 1024 KB
009.txt AC 40 ms 1024 KB
010.txt AC 41 ms 1024 KB
011.txt AC 41 ms 1024 KB
012.txt AC 41 ms 1024 KB
013.txt AC 40 ms 1024 KB
014.txt AC 41 ms 1024 KB
015.txt AC 41 ms 1024 KB
016.txt AC 41 ms 1024 KB
017.txt AC 41 ms 1024 KB
018.txt AC 41 ms 1024 KB
019.txt AC 41 ms 1024 KB
020.txt AC 41 ms 1024 KB
021.txt AC 41 ms 1024 KB
022.txt AC 41 ms 1024 KB
023.txt AC 41 ms 1024 KB
024.txt AC 41 ms 1024 KB
025.txt AC 41 ms 1024 KB
026.txt AC 41 ms 1024 KB
027.txt AC 41 ms 1024 KB
028.txt AC 41 ms 1024 KB
029.txt AC 41 ms 1024 KB
030.txt AC 40 ms 1152 KB
031.txt AC 41 ms 1024 KB
032.txt AC 41 ms 1024 KB
033.txt AC 41 ms 1024 KB
034.txt AC 41 ms 1024 KB
035.txt AC 41 ms 1024 KB
036.txt AC 41 ms 1024 KB
037.txt AC 41 ms 1024 KB
038.txt AC 41 ms 1024 KB
039.txt AC 40 ms 1024 KB
040.txt AC 3 ms 256 KB
041.txt AC 3 ms 256 KB
042.txt AC 3 ms 256 KB
043.txt AC 3 ms 256 KB
example0.txt AC 3 ms 256 KB
example1.txt AC 41 ms 1024 KB