Plz help me, i not understand why i have WA.

#include <stdio.h>

int main()
{
  int i,j=0,tmp,real;
  int K;
  int wantnum=0;
  int grp[101];

  scanf("%d",&K);
  for(i=0; i<K; i++)
  {
    scanf("%d",&tmp);
    if((tmp%2 == 0)) continue;
    grp[j] = tmp; j++;
  }
  real=j;

  for(i=0; i<K; i++)
    for(j=0; j<K-i; j++)
      if(grp[j] > grp[j+1])
      {
        tmp=grp[j];
        grp[j]=grp[j+1];
        grp[j+1]=tmp;
      }
  for(i=0; i<real/2+1; i++)
    wantnum += grp[i]/2+1;
  printf("%d",wantnum);
  return 0;
}

your bubble sort is not working right.
add -1 on the second for check

for(i=0; i<K; i++)
for(j=0; j<K-i - 1; j++)
if(grp[j] > grp[j+1])
{
tmp=grp[j];
grp[j]=grp[j+1];
grp[j+1]=tmp;
}

sorry for my english :P