Topcoder SRM 640 div2 250point

this question is very easy!!

start and ribons

if left and right is different counting ++

my code is below~


problem
http://community.topcoder.com/stat?c=problem_statement&pm=13556

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public class ChristmasTreeDecorationDiv2 { public int solve(int[] col, int[] x, int[] y){ int len = x.length; int cnt =0; for(int i=0; i<len; i++){ if(col[x[i]-1] != col[y[i]-1]){ cnt++; } } return cnt; } }