```
public class Solution {
public int threeSumSmaller(int[] nums, int target) {
Arrays.sort(nums);
int res=0;
for(int i=0;i<nums.length;i++){
int p1=i+1<nums.length? i+1:nums.length-1;
int p2=nums.length-1;
while(p1<p2){
int sum= nums[i]+nums[p1]+nums[p2];
if(sum<target){
res+=(p2-p1);// once we find a sum which is smaller than target then [p1,p1+1] [p1,p1+2]....[p1,p2] all of them should be inclued in the res;
p1++;
}
else
p2--;
}
}
return res;
}
```

}