26 lines
847 B
C
26 lines
847 B
C
#include <stdio.h>
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#define O 1000
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#define E(a,b,X)if(a==b){X}else
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#define u int
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#define C(x,y)I+=++m[x][y]==2;
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#define P(a,b)a<b?1:-1
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#define L(s,e)u S=P(s,e);for(u c=s;c!=e;c+=S)
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u
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main
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(void){u
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m[O][O]={0},
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x,X,y,Y,
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I=0;while(
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fscanf( stdin,
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"%i,%i -> %i,%i",&
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x,&y,&X,&Y)==4){E(x,X,L
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(y,Y)C(x,c)C(x,Y)
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)E(y,Y,L(x,X)C(c,y)C
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(X,y)){u h=x,v=y,H=P(x,X
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),V=P(y,Y);for(;h!=X&&v!=Y;h+=
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H,v+=V
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)C(h,v
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)C(h,v
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)}}printf(
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"Answer: %d\n",I);}
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