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arr[]={1,3,2,4,6,7,8,9,10, 11,12,16,5,8,7,8,4,6, 8,9,10, 11,12,16,2,4, 5};
split=2; // the arr[] will be divide in 2(no of splits) parts each with equal elements split=1,2,3...n
skip=2; // skip is no of element to be skipped. skip=1,2,3...n size of res[] should be accordingly.
group=3 // vary between 1,2,3..n
then
res[0]=15 //1+4+8
res[1]=18//3+6+9
res[2]=19 //2+7+10
res[3]=24 //11+5+8
res[4]= 24 //12+8+4
res[5]= 29//16+7+6
res[6]=21 //8+11+2
res[7]=25 //9+12+4
res[8]=31 //10+16+5
and like wise split can be 1 to n.
arr[]={1,2,3...n} elements