2009年3月25日星期三

Vijos 1512 SuperBrother打鼹鼠 解题报告

二维树状数组，为了便于处理，将坐标全部做+1，sum[x1+1,y1+1,x2+1,y2+1]=sum[1,1,x2+1,y2+1]-sum[1,1,x1,y2+1]-sum[1,1,x2+1,y1]+sum[1,1,x1,y1];主要是注意做了转化后坐标处理的一些细节即可。

R1187587 Accepted 100 From IwfWcf－ P1512 FPC Vivid Puppy 2009-3-25 21:35:27

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