xfstart07
Get busy living or get busy dying

/*
PROG: window
LANG: C++
*/

#include
< cstdio >
#include
< cstring >
using   namespace  std;

const   int  maxn = 128 ;
int  n,head,tail;
char  s[ 50 ];
int  prev[maxn],next[maxn];
int  x1[maxn],y1[maxn],x2[maxn],y2[maxn];
void  swap( int   & x, int   & y)
{
    
int  tmp = x;
    x
= y;
    y
= tmp;
}
void  addhead()
{
    prev[n]
=- 1 ;
    next[n]
= head;
    
if (head !=- 1 ) prev[head] = n;
    head
= n;
    
if (tail ==- 1 ) tail = n;
}
void  addtail()
{
    next[n]
=- 1 ;
    prev[n]
= tail;
    
if (tail !=- 1 ) next[tail] = n;
    tail
= n;
    
if (head ==- 1 ) head = n;
}
void  move()
{
    
if (n != head) next[prev[n]] = next[n];
    
if (n != tail) prev[next[n]] = prev[n];
    
if (n == head) head = next[n];
    
if (n == tail) tail = prev[n];
}
double  cut( int  x, int  y, int  l, int  r, int  z)
{
    
while (z !=- 1 && (x >= x2[z] || y >= y2[z] || l <= x1[z] || r <= y1[z]))
        z
= next[z];
    
if (z ==- 1 return  (l - x) * (r - y);
    
double  res = 0 ;
    
if (x < x1[z]){
        res
+= cut(x,y,x1[z],r,next[z]);
        x
= x1[z];
    }
    
if (l > x2[z]){
        res
+= cut(x2[z],y,l,r,next[z]);
        l
= x2[z];
    }
    
if (y < y1[z])
        res
+= cut(x,y,l,y1[z],next[z]);
    
if (r > y2[z])
        res
+= cut(x,y2[z],l,r,next[z]);
    
return  res;
}
void  solve_w()
{
    sscanf(s
+ 4 , " %d,%d,%d,%d " ,x1 + n,y1 + n,x2 + n,y2 + n);
    
if (x2[n] < x1[n]) swap(x1[n],x2[n]);
    
if (y2[n] < y1[n]) swap(y1[n],y2[n]);
    addtail();
}
void  solve_t()
{
    move();
    addtail();
}
void  solve_b()
{
    move();
    addhead();
}
void  solve_d()
{
    move();
}
void  solve_s()
{
    
double  ans = cut(x1[n],y1[n],x2[n],y2[n],next[n]);
    printf(
" %0.3lf\n " , 100.0 * (ans / ((x2[n] - x1[n]) * (y2[n] - y1[n]))));
}
void  solve()
{
    n
= s[ 2 ];
    
switch (s[ 0 ]){
        
case   ' w ' :
            solve_w();
            
break ;
        
case   ' t ' :
            solve_t();
            
break ;
        
case   ' b ' :
            solve_b();
            
break ;
        
case   ' d ' :
            solve_d();
            
break ;
        
case   ' s ' :
            solve_s();
    }
}
int  main()
{
    freopen(
" window.in " , " r " ,stdin);
    freopen(
" window.out " , " w " ,stdout);
    head
= tail =- 1 ;
    memset(prev,
- 1 , sizeof (prev));
    memset(next,
- 1 , sizeof (next));
    
do {
        scanf(
" %s\n " ,s);
        solve();
    }
while ( ! feof(stdin));
    
return   0 ;
}
/*

Executing
   Test 1: TEST OK [0.011 secs, 2804 KB]
   Test 2: TEST OK [0.011 secs, 2804 KB]
   Test 3: TEST OK [0.000 secs, 2804 KB]
   Test 4: TEST OK [0.011 secs, 2804 KB]
   Test 5: TEST OK [0.000 secs, 2804 KB]
   Test 6: TEST OK [0.000 secs, 2804 KB]
   Test 7: TEST OK [0.000 secs, 2804 KB]
   Test 8: TEST OK [0.000 secs, 2804 KB]
   Test 9: TEST OK [0.000 secs, 2804 KB]
   Test 10: TEST OK [0.011 secs, 2804 KB]
   Test 11: TEST OK [0.011 secs, 2804 KB]
*/



posted on 2009-07-23 13:53 xfstart07 阅读(136) 评论(0)  编辑 收藏 引用

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