oj.uz

Submission #141723

# Submission time Handle Problem Language Result Execution time Memory
141723 2019-08-09T00:58:56 Z imsifile Organizing the Best Squad (FXCUP4_squad) C++17
100 / 100
 1142 ms 64064 KB 
#include "squad.h"
#include <algorithm>
#include <stdio.h>
using namespace std;

typedef long long lld;

struct coord {
	lld x, y; int ix;
	bool operator< (const coord& c) const {
		if(x!=c.x) return x<c.x;
		return y<c.y;
	}
} AP[1001001], DP[1001001];

int N;

lld ccw(coord a, coord b, coord c){ // clockwise < 0
	return (a.x*b.y+b.x*c.y+c.x*a.y) - (a.y*b.x+b.y*c.x+c.y*a.x);
}

void makehull(coord *ba, vector<int> &chk, int val, vector<coord> &cvx){
	cvx.clear();
	for(int i=0; i<N; i++){
		int sz;
		if(chk[ba[i].ix]==val) continue;
		while(1){
			sz=cvx.size();
			if(sz<2) break;
			if(ccw(cvx[sz-2], cvx[sz-1], ba[i]) < 0) break;
			cvx.pop_back();
		}
		cvx.push_back(ba[i]);
	}
}

void threehull(coord *ba, vector<coord> &cvx, vector<coord> &odd, vector<coord> &even){
	vector<int> chk(N,0);
	sort(ba, ba+N);
	makehull(ba, chk, 1, cvx);
	for(int i=cvx.size(); i--;){
		if(i%2) chk[cvx[i].ix]=1;
		else chk[cvx[i].ix]=2;
	}
	makehull(ba, chk, 1, odd);
	makehull(ba, chk, 2, even);
}

vector<coord> Acv, Aov, Aev, Dcv, Dov, Dev;

void Init(int N_, vector<int> A, vector<int> D, vector<int> P){
	N=N_;
	for(int i=0; i<N; i++){
		AP[i].ix=i, AP[i].x=A[i], AP[i].y=P[i];
		DP[i].ix=i, DP[i].x=D[i], DP[i].y=P[i];
	}
	threehull(AP, Acv, Aov, Aev);
	threehull(DP, Dcv, Dov, Dev);
}

int getfirst(lld A, lld B, vector<coord> &cvx){
	if(cvx.size() == 1) return 0;
	int mi=0, mx=cvx.size()-2, md;
	while(mi<=mx){
		md=(mi+mx)/2;
		if(cvx[md].x*A + cvx[md].y*B < cvx[md+1].x*A + cvx[md+1].y*B) mi=md+1;
		else mx=md-1;
	}
	return mi;
}

coord A1, A2, D1, D2;

lld BestSquad(int X, int Y){
	int ix;
	ix=getfirst(X, Y, Acv), A1=Acv[ix];
	if(ix%2) ix=getfirst(X, Y, Aov), A2=Aov[ix];
	else ix=getfirst(X, Y, Aev), A2=Aev[ix];

	ix=getfirst(X, Y, Dcv), D1=Dcv[ix];
	if(ix%2) ix=getfirst(X, Y, Dov), D2=Dov[ix];
	else ix=getfirst(X, Y, Dev), D2=Dev[ix];

	if(A1.ix != D1.ix) return (A1.x+D1.x)*X + (A1.y+D1.y)*Y;
	return max((A2.x+D1.x)*X + (A2.y+D1.y)*Y, (A1.x+D2.x)*X + (A1.y+D2.y)*Y);
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 284 ms 22648 KB Output is correct
4 Correct 286 ms 22756 KB Output is correct
5 Correct 19 ms 4208 KB Output is correct
6 Correct 319 ms 61596 KB Output is correct
7 Correct 317 ms 61496 KB Output is correct
8 Correct 315 ms 61548 KB Output is correct

Subtask #2
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 5 ms 504 KB Output is correct
3 Correct 432 ms 24992 KB Output is correct
4 Correct 441 ms 24988 KB Output is correct
5 Correct 23 ms 2292 KB Output is correct
6 Correct 712 ms 44020 KB Output is correct
7 Correct 708 ms 44048 KB Output is correct
8 Correct 702 ms 44016 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 284 ms 22648 KB Output is correct
4 Correct 286 ms 22756 KB Output is correct
5 Correct 19 ms 4208 KB Output is correct
6 Correct 319 ms 61596 KB Output is correct
7 Correct 317 ms 61496 KB Output is correct
8 Correct 315 ms 61548 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 5 ms 504 KB Output is correct
11 Correct 432 ms 24992 KB Output is correct
12 Correct 441 ms 24988 KB Output is correct
13 Correct 23 ms 2292 KB Output is correct
14 Correct 712 ms 44020 KB Output is correct
15 Correct 708 ms 44048 KB Output is correct
16 Correct 702 ms 44016 KB Output is correct
17 Correct 77 ms 2892 KB Output is correct
18 Correct 6 ms 632 KB Output is correct
19 Correct 477 ms 24992 KB Output is correct
20 Correct 475 ms 25120 KB Output is correct
21 Correct 36 ms 3060 KB Output is correct
22 Correct 1135 ms 64064 KB Output is correct
23 Correct 1142 ms 63992 KB Output is correct
24 Correct 1128 ms 63968 KB Output is correct