oj.uz

답안 #200476

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
200476 2020-02-06T23:58:39 Z CaroLinda 시간이 돈 (balkan11_timeismoney) C++14
70 / 100
 120 ms 852 KB 
#include <bits/stdc++.h>

#define all(x) x.begin(),x.end()

const int INF = 1e9+10 ;
const int MAXN = 210 ;
const int MAXM = 1e4 + 10 ;

using namespace std ;

struct Edge
{

	int u , v , x , y ;

	Edge(int u=0, int v=0, int x=0, int y=0) : u(u) , v(v) , x(x) , y(y) {}

} ;

int N , M , U , V , X , Y , A , B ;
int ans = INF , id_ans , id , ansx , ansy ;
vector< pair<int,int > > resp[MAXN] ;
vector<Edge> edge ;

int calc(int x , int y) { return x * A + y * B ; }

bool cmp1(Edge a , Edge b) { return a.x < b.x || (a.x == b.x && a.y < b.y) ; }
bool cmp2( Edge a , Edge b ) { return a.x > b.x || (a.x == b.x && a.y < b.y  ) ; }
bool cmp3( Edge a , Edge b ) { return calc(a.x, a.y)  < calc(b.x, b.y) ; }

// -------------------------------
//Kruskal's algorithm
int pai[MAXN] ;
int find(int x) { return ( pai[x] == x ) ? x : (pai[x] = find(pai[x]) ) ; }
bool join(int a, int b)
{
	a = find(a) ; 
	b = find(b) ;

	if( a == b ) return false ;

	if( rand() % 2 == 1 ) pai[a] = b ;
	else pai[b] = a ;

	return true ;

}

pair<int,int> MST( vector<Edge> edg, int save = 0 )
{

	iota(pai, pai+N , 0) ;
	id ++ ;

	X = 0 , Y = 0 ;

	for(Edge e : edg ) 
		if( join( e.u , e.v ) )
			X += e.x , Y += e.y , resp[id].push_back( make_pair(e.u, e.v) ) ;

	return make_pair( X , Y ) ;

}
inline void remake( pair<int,int> p1 )
{
	if( ans <= p1.first * p1.second ) return ;
	ans = p1.first * p1.second ;
	ansx = p1.first ;
	ansy = p1.second ;
	id_ans = id ;
}
// -------------------------------

int main()
{
	scanf("%d%d", &N , &M ) ;
	for(int i = 1 ; i <= M ; i++ )
	{
		scanf("%d%d%d%d", &U, &V, &X, &Y ) ;
		edge.push_back( Edge(U,V,X,Y) ) ;
	}

	sort( all(edge) , cmp1 ) ;
	pair<int,int> p1 = MST( edge ) ;
	remake(p1) ;
	sort( all(edge) , cmp2 ) ;
	pair<int,int> p2 = MST(edge) ;
	remake(p2) ;

	queue< pair< pair<int,int> ,pair<int,int> > > fila ;

	fila.push( make_pair(p1,p2) ) ;

	int cnt = 110 ;

	while( !fila.empty()  && cnt -- ) 
	{

		pair<int,int> l = fila.front().first ;
		pair<int,int> r = fila.front().second ;

		fila.pop() ;

		//printf("Testing %d %d, %d %d\n", l.first, l.second, r.first, r.second ) ;

		A = l.second - r.second ;
		B = -l.first + r.first ;

		sort(all(edge) , cmp3 ) ;

		pair<int,int> res = MST(edge) ;

		remake(res) ;

		if( res == l || res == r )
			continue ;

		fila.push( make_pair(l,res) ) ;
		fila.push( make_pair(res, r) ) ;

	}
	
	printf("%d %d\n" , ansx, ansy ) ;
	for(auto i : resp[id_ans]) printf("%d %d\n" , i.first, i.second ) ;

}

Compilation message

timeismoney.cpp: In function 'int main()':
timeismoney.cpp:76:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N , &M ) ;
  ~~~~~^~~~~~~~~~~~~~~~~~
timeismoney.cpp:79:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d", &U, &V, &X, &Y ) ;
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
70.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 6 ms 376 KB Output is correct
5 Correct 7 ms 376 KB Output is correct
6 Correct 7 ms 504 KB Output is correct
7 Incorrect 17 ms 632 KB Output isn't correct
8 Incorrect 58 ms 852 KB Output isn't correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 376 KB Output is correct
12 Correct 5 ms 376 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Incorrect 9 ms 380 KB Output isn't correct
15 Correct 9 ms 632 KB Output is correct
16 Incorrect 26 ms 632 KB Output isn't correct
17 Correct 26 ms 636 KB Output is correct
18 Correct 26 ms 632 KB Output is correct
19 Incorrect 119 ms 852 KB Output isn't correct
20 Incorrect 120 ms 852 KB Output isn't correct