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被精度恶心到死了

Posted by twf at 2010-05-25 14:22:45 on Problem 1151

for(int i=0;i<n*2;++i)
			for(int j=0;j<n*2;++j) 
					area+=mark[i][j]*(sortedx[i+1]-sortedx[i])*(sortedy[j+1]-sortedy[j]); 

与

for(int i=0;i<n*2;++i)
			for(int j=0;j<n*2;++j) 
				if(mark[i][j])
					area+=(sortedx[i+1]-sortedx[i])*(sortedy[j+1]-sortedy[j]); 

有很大差别吗？
一个ac， 一个wa

Followed by:

Re:被精度恶心到死了 (26) ARA 2010-06-15 16:18:26

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