OJ-Problems-Source/HDOJ/5333_autoAC.cpp

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#pragma comment(linker, "/STACK:1024000000")
#include <stdio.h>
#include <string.h>
#include <map>
#include <algorithm>
using namespace std ;
typedef long long LL ;
#define clr( a , x ) memset ( a , x , sizeof a )
#define ls ( o << 1 )
#define rs ( o << 1 | 1 )
#define lson ls , l , m
#define rson rs , m + 1 , r
#define root 1 , 1 , n
#define mid ( ( l + r ) >> 1 )
const int MAXN = 100005 ;
const int MAXE = 200005 ;
const int INF = 0x3f3f3f3f ;
struct Edge {
int v , idx , n ;
Edge () {}
Edge ( int v , int idx , int n ) : v ( v ) , idx ( idx ) , n ( n ) {}
} ;
struct Node* null ;
struct Node {
Node* c[2] ;
Node* f ;
bool flip ;
int minv , val ;
int eidx , idx ;
void newnode ( int v , int i ) {
c[0] = c[1] = f = null ;
minv = val = v ;
eidx = idx = i ;
flip = 0 ;
}
void rev () {
if ( this == null ) return ;
swap ( c[0] , c[1] ) ;
flip ^= 1 ;
}
void up () {
if ( this == null ) return ;
if ( val <= c[0]->minv && val <= c[1]->minv ) {
minv = val ;
eidx = idx ;
} else if ( c[0]->minv <= c[1]->minv && c[0]->minv <= val ) {
minv = c[0]->minv ;
eidx = c[0]->eidx ;
} else {
minv = c[1]->minv ;
eidx = c[1]->eidx ;
}
}
void down () {
if ( this == null ) return ;
if ( flip ) {
c[0]->rev () ;
c[1]->rev () ;
flip = 0 ;
}
}
bool is_root () {
return f == null || f->c[0] != this && f->c[1] != this ;
}
void sign_down () {
if ( !is_root () ) f->sign_down () ;
down () ;
}
void setc ( Node* o , int d ) {
c[d] = o ;
o->f = this ;
}
void rot ( int d ) {
Node* p = f ;
Node* g = f->f ;
p->setc ( c[d] , !d ) ;
if ( !p->is_root () ) g->setc ( this , f == g->c[1] ) ;
else f = g ;
setc ( p , d ) ;
p->up () ;
}
void splay () {
sign_down () ;
while ( !is_root () ) {
if ( f->is_root () ) rot ( this == f->c[0] ) ;
else {
if ( f == f->f->c[0] ) {
if ( this == f->c[0] ) f->rot ( 1 ) , rot ( 1 ) ;
else rot ( 0 ) , rot ( 1 ) ;
} else {
if ( this == f->c[1] ) f->rot ( 0 ) , rot ( 0 ) ;
else rot ( 1 ) , rot ( 0 ) ;
}
}
}
up () ;
}
void access () {
Node* o = this ;
for ( Node* x = null ; o != null ; x = o , o = o->f ) {
o->splay () ;
o->setc ( x , 1 ) ;
o->up () ;
}
splay () ;
}
void make_root () {
access () ;
rev () ;
}
void link ( Node* o ) {
make_root () ;
f = o ;
}
void cut () {
access () ;
c[0] = c[0]->f = null ;
up () ;
}
void cut ( Node* o ) {
make_root () ;
o->cut () ;
}
int get_min ( Node* o ) {
make_root () ;
o->access () ;
return o->eidx ;
}
} ;
Node pool[MAXN + MAXE] ;
Node* cur ;
Node* node[MAXN] ;
Node* edge[MAXE] ;
Edge E[MAXE + MAXN] ;
int H[MAXN] , Q[MAXN] , cntE ;
int U[MAXE] , V[MAXE] ;
int ans[MAXN] ;
int p[MAXN] ;
int c[MAXN] ;
int n , m , q ;
int find ( int x ) {
return p[x] == x ? x : ( p[x] = find ( p[x] ) ) ;
}
void init ( int n ) {
cntE = 0 ;
cur = pool ;
cur->newnode ( INF , -1 ) ;
null = cur ++ ;
for ( int i = 1 ; i <= n ; ++ i ) {
p[i] = i ;
H[i] = -1 ;
Q[i] = -1 ;
c[i] = 0 ;
cur->newnode ( INF , -1 ) ;
node[i] = cur ++ ;
}
}
void addedge ( int u , int v , int idx , int H[] ) {
E[cntE] = Edge ( v , idx , H[u] ) ;
H[u] = cntE ++ ;
}
void add ( int x , int v ) {
for ( ; x <= n ; x += x & -x ) c[x] += v ;
}
int sum ( int x , int ans = 0 ) {
for ( ; x > 0 ; x -= x & -x ) ans += c[x] ;
return ans ;
}
void scanf ( int& x , char c = 0 ) {
while ( ( c = getchar () ) < '0' ) ;
x = c - '0' ;
while ( ( c = getchar () ) >= '0' ) x = x * 10 + c - '0' ;
}
void solve () {
int cnt = 0 ;
int u , v ;
init ( n ) ;
for ( int i = 1 ; i <= n ; ++ i ) add ( i , -1 ) ;
for ( int i = 0 ; i < m ; ++ i ) {
scanf ( "%d%d" , &u , &v ) ;
if ( u == v ) continue ;
if ( u < v ) swap ( u , v ) ;
addedge ( u , v , i , H ) ;
U[i] = u ;
V[i] = v ;
cur->newnode ( v , i ) ;
edge[i] = cur ++ ;
}
for ( int i = 0 ; i < q ; ++ i ) {
scanf ( "%d%d" , &u , &v ) ;
addedge ( v , u , i , Q ) ;
}
for ( int i = 1 ; i <= n ; ++ i ) {
++ cnt ;
for ( int j = H[i] ; ~j ; j = E[j].n ) {
int v = E[j].v , idx = E[j].idx ;
if ( v == i ) continue ;
int x = find ( i ) ;
int y = find ( v ) ;
if ( x != y ) {
-- cnt ;
p[x] = y ;
edge[idx]->link ( node[i] ) ;
edge[idx]->link ( node[v] ) ;
add ( v , 1 ) ;
} else {
int eidx = node[i]->get_min ( node[v] ) ;
if ( V[eidx] >= v ) continue ;
edge[eidx]->cut ( node[U[eidx]] ) ;
edge[eidx]->cut ( node[V[eidx]] ) ;
add ( V[eidx] , -1 ) ;
edge[idx]->link ( node[i] ) ;
edge[idx]->link ( node[v] ) ;
add ( v , 1 ) ;
}
}
for ( int j = Q[i] ; ~j ; j = E[j].n ) {
int v = E[j].v , idx = E[j].idx ;
ans[idx] = cnt + sum ( v - 1 ) + n - i + v - 1 ;
}
}
for ( int i = 0 ; i < q ; ++ i ) {
printf ( "%d\n" , ans[i] ) ;
}
}
int main () {
while ( ~scanf ( "%d%d%d" , &n , &m , &q ) ) solve () ;
return 0 ;
}