src/work/jacint/preflow_excess.h
changeset 1327 ecc1cdea2ee7
parent 921 818510fa3d99
equal deleted inserted replaced
1:64cc8f30f501 2:b425b6096e92
   134 	  bfs_queue.pop();
   134 	  bfs_queue.pop();
   135 	  int l=level[v]+1;
   135 	  int l=level[v]+1;
   136 	  
   136 	  
   137 	  InEdgeIt e;
   137 	  InEdgeIt e;
   138 	  for(G.first(e,v); G.valid(e); G.next(e)) {
   138 	  for(G.first(e,v); G.valid(e); G.next(e)) {
   139 	    Node w=G.tail(e);
   139 	    Node w=G.source(e);
   140 	    if ( level[w] == n && w != s ) {
   140 	    if ( level[w] == n && w != s ) {
   141 	      bfs_queue.push(w);
   141 	      bfs_queue.push(w);
   142 	      Node first=level_list[l];
   142 	      Node first=level_list[l];
   143 	      if ( G.valid(first) ) left.set(first,w);
   143 	      if ( G.valid(first) ) left.set(first,w);
   144 	      right.set(w,first);
   144 	      right.set(w,first);
   152 	OutEdgeIt e;
   152 	OutEdgeIt e;
   153 	for(G.first(e,s); G.valid(e); G.next(e)) 
   153 	for(G.first(e,s); G.valid(e); G.next(e)) 
   154 	{
   154 	{
   155 	  T c=capacity[e];
   155 	  T c=capacity[e];
   156 	  if ( c == 0 ) continue;
   156 	  if ( c == 0 ) continue;
   157 	  Node w=G.head(e);
   157 	  Node w=G.target(e);
   158 	  if ( level[w] < n ) {	  
   158 	  if ( level[w] < n ) {	  
   159 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   159 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   160 	    flow.set(e, c); 
   160 	    flow.set(e, c); 
   161 	    excess.set(w, excess[w]+c);
   161 	    excess.set(w, excess[w]+c);
   162 	  }
   162 	  }
   180 	  int l=level[v]+1;
   180 	  int l=level[v]+1;
   181 	  
   181 	  
   182 	  InEdgeIt e;
   182 	  InEdgeIt e;
   183 	  for(G.first(e,v); G.valid(e); G.next(e)) {
   183 	  for(G.first(e,v); G.valid(e); G.next(e)) {
   184 	    if ( capacity[e] == flow[e] ) continue;
   184 	    if ( capacity[e] == flow[e] ) continue;
   185 	    Node w=G.tail(e);
   185 	    Node w=G.source(e);
   186 	    if ( level[w] == n && w != s ) {
   186 	    if ( level[w] == n && w != s ) {
   187 	      bfs_queue.push(w);
   187 	      bfs_queue.push(w);
   188 	      Node first=level_list[l];
   188 	      Node first=level_list[l];
   189 	      if ( G.valid(first) ) left.set(first,w);
   189 	      if ( G.valid(first) ) left.set(first,w);
   190 	      right.set(w,first);
   190 	      right.set(w,first);
   194 	  }
   194 	  }
   195 	    
   195 	    
   196 	  OutEdgeIt f;
   196 	  OutEdgeIt f;
   197 	  for(G.first(f,v); G.valid(f); G.next(f)) {
   197 	  for(G.first(f,v); G.valid(f); G.next(f)) {
   198 	    if ( 0 == flow[f] ) continue;
   198 	    if ( 0 == flow[f] ) continue;
   199 	    Node w=G.head(f);
   199 	    Node w=G.target(f);
   200 	    if ( level[w] == n && w != s ) {
   200 	    if ( level[w] == n && w != s ) {
   201 	      bfs_queue.push(w);
   201 	      bfs_queue.push(w);
   202 	      Node first=level_list[l];
   202 	      Node first=level_list[l];
   203 	      if ( G.valid(first) ) left.set(first,w);
   203 	      if ( G.valid(first) ) left.set(first,w);
   204 	      right.set(w,first);
   204 	      right.set(w,first);
   245 	OutEdgeIt e;
   245 	OutEdgeIt e;
   246 	for(G.first(e,s); G.valid(e); G.next(e)) 
   246 	for(G.first(e,s); G.valid(e); G.next(e)) 
   247 	{
   247 	{
   248 	  T rem=capacity[e]-flow[e];
   248 	  T rem=capacity[e]-flow[e];
   249 	  if ( rem == 0 ) continue;
   249 	  if ( rem == 0 ) continue;
   250 	  Node w=G.head(e);
   250 	  Node w=G.target(e);
   251 	  if ( level[w] < n ) {	  
   251 	  if ( level[w] < n ) {	  
   252 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   252 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   253 	    flow.set(e, capacity[e]); 
   253 	    flow.set(e, capacity[e]); 
   254 	    excess.set(w, excess[w]+rem);
   254 	    excess.set(w, excess[w]+rem);
   255 	  }
   255 	  }
   257 	
   257 	
   258 	InEdgeIt f;
   258 	InEdgeIt f;
   259 	for(G.first(f,s); G.valid(f); G.next(f)) 
   259 	for(G.first(f,s); G.valid(f); G.next(f)) 
   260 	{
   260 	{
   261 	  if ( flow[f] == 0 ) continue;
   261 	  if ( flow[f] == 0 ) continue;
   262 	  Node w=G.tail(f);
   262 	  Node w=G.source(f);
   263 	  if ( level[w] < n ) {	  
   263 	  if ( level[w] < n ) {	  
   264 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   264 	    if ( excess[w] == 0 && w!=t ) active[level[w]].push(w);
   265 	    excess.set(w, excess[w]+flow[f]);
   265 	    excess.set(w, excess[w]+flow[f]);
   266 	    flow.set(f, 0); 
   266 	    flow.set(f, 0); 
   267 	  }
   267 	  }
   301 	      int l=level[v]+1;
   301 	      int l=level[v]+1;
   302 	      
   302 	      
   303 	      InEdgeIt e;
   303 	      InEdgeIt e;
   304 	      for(G.first(e,v); G.valid(e); G.next(e)) {
   304 	      for(G.first(e,v); G.valid(e); G.next(e)) {
   305 		if ( capacity[e] == flow[e] ) continue;
   305 		if ( capacity[e] == flow[e] ) continue;
   306 		Node u=G.tail(e);
   306 		Node u=G.source(e);
   307 		if ( level[u] >= n ) { 
   307 		if ( level[u] >= n ) { 
   308 		  bfs_queue.push(u);
   308 		  bfs_queue.push(u);
   309 		  level.set(u, l);
   309 		  level.set(u, l);
   310 		  if ( excess[u] > 0 ) active[l].push(u);
   310 		  if ( excess[u] > 0 ) active[l].push(u);
   311 		}
   311 		}
   312 	      }
   312 	      }
   313 	    
   313 	    
   314 	      OutEdgeIt f;
   314 	      OutEdgeIt f;
   315 	      for(G.first(f,v); G.valid(f); G.next(f)) {
   315 	      for(G.first(f,v); G.valid(f); G.next(f)) {
   316 		if ( 0 == flow[f] ) continue;
   316 		if ( 0 == flow[f] ) continue;
   317 		Node u=G.head(f);
   317 		Node u=G.target(f);
   318 		if ( level[u] >= n ) { 
   318 		if ( level[u] >= n ) { 
   319 		  bfs_queue.push(u);
   319 		  bfs_queue.push(u);
   320 		  level.set(u, l);
   320 		  level.set(u, l);
   321 		  if ( excess[u] > 0 ) active[l].push(u);
   321 		  if ( excess[u] > 0 ) active[l].push(u);
   322 		}
   322 		}
   341 	  
   341 	  
   342 	  OutEdgeIt e;
   342 	  OutEdgeIt e;
   343 	  for(G.first(e,w); G.valid(e); G.next(e)) {
   343 	  for(G.first(e,w); G.valid(e); G.next(e)) {
   344 	    
   344 	    
   345 	    if ( flow[e] == capacity[e] ) continue; 
   345 	    if ( flow[e] == capacity[e] ) continue; 
   346 	    Node v=G.head(e);            
   346 	    Node v=G.target(e);            
   347 	    //e=wv	    
   347 	    //e=wv	    
   348 	    
   348 	    
   349 	    if( lev > level[v] ) {      
   349 	    if( lev > level[v] ) {      
   350 	      /*Push is allowed now*/
   350 	      /*Push is allowed now*/
   351 	      
   351 	      
   383 	if ( exc > 0 ) {	
   383 	if ( exc > 0 ) {	
   384 	  InEdgeIt e;
   384 	  InEdgeIt e;
   385 	  for(G.first(e,w); G.valid(e); G.next(e)) {
   385 	  for(G.first(e,w); G.valid(e); G.next(e)) {
   386 	    
   386 	    
   387 	    if( flow[e] == 0 ) continue; 
   387 	    if( flow[e] == 0 ) continue; 
   388 	    Node v=G.tail(e);  
   388 	    Node v=G.source(e);  
   389 	    //e=vw
   389 	    //e=vw
   390 	    
   390 	    
   391 	    if( lev > level[v] ) {  
   391 	    if( lev > level[v] ) {  
   392 	      /*Push is allowed now*/
   392 	      /*Push is allowed now*/
   393 	      
   393 	      
   567         Node w=queue.front();
   567         Node w=queue.front();
   568 	queue.pop();
   568 	queue.pop();
   569 
   569 
   570 	OutEdgeIt e;
   570 	OutEdgeIt e;
   571 	for(G.first(e,w) ; G.valid(e); G.next(e)) {
   571 	for(G.first(e,w) ; G.valid(e); G.next(e)) {
   572 	  Node v=G.head(e);
   572 	  Node v=G.target(e);
   573 	  if (!M[v] && flow[e] < capacity[e] ) {
   573 	  if (!M[v] && flow[e] < capacity[e] ) {
   574 	    queue.push(v);
   574 	    queue.push(v);
   575 	    M.set(v, true);
   575 	    M.set(v, true);
   576 	  }
   576 	  }
   577 	} 
   577 	} 
   578 
   578 
   579 	InEdgeIt f;
   579 	InEdgeIt f;
   580 	for(G.first(f,w) ; G.valid(f); G.next(f)) {
   580 	for(G.first(f,w) ; G.valid(f); G.next(f)) {
   581 	  Node v=G.tail(f);
   581 	  Node v=G.source(f);
   582 	  if (!M[v] && flow[f] > 0 ) {
   582 	  if (!M[v] && flow[f] > 0 ) {
   583 	    queue.push(v);
   583 	    queue.push(v);
   584 	    M.set(v, true);
   584 	    M.set(v, true);
   585 	  }
   585 	  }
   586 	} 
   586 	} 
   607 	queue.pop();
   607 	queue.pop();
   608 
   608 
   609 
   609 
   610 	InEdgeIt e;
   610 	InEdgeIt e;
   611 	for(G.first(e,w) ; G.valid(e); G.next(e)) {
   611 	for(G.first(e,w) ; G.valid(e); G.next(e)) {
   612 	  Node v=G.tail(e);
   612 	  Node v=G.source(e);
   613 	  if (!M[v] && flow[e] < capacity[e] ) {
   613 	  if (!M[v] && flow[e] < capacity[e] ) {
   614 	    queue.push(v);
   614 	    queue.push(v);
   615 	    M.set(v, true);
   615 	    M.set(v, true);
   616 	  }
   616 	  }
   617 	}
   617 	}
   618 	
   618 	
   619 	OutEdgeIt f;
   619 	OutEdgeIt f;
   620 	for(G.first(f,w) ; G.valid(f); G.next(f)) {
   620 	for(G.first(f,w) ; G.valid(f); G.next(f)) {
   621 	  Node v=G.head(f);
   621 	  Node v=G.target(f);
   622 	  if (!M[v] && flow[f] > 0 ) {
   622 	  if (!M[v] && flow[f] > 0 ) {
   623 	    queue.push(v);
   623 	    queue.push(v);
   624 	    M.set(v, true);
   624 	    M.set(v, true);
   625 	  }
   625 	  }
   626 	}
   626 	}