Not compiling pls check the error

#1

#include <bits/stdc++.h>
using namespace std;
int main(){
int nums[]={2,3,4,1,3,2};
int ans=0;
int n=sizeof(nums)/sizeof(int);
for(int i=0;i<n;i++){
int temp=abs(nums[i]);
if(nums[temp-1]<0){
ans+=temp;
}
else{
nums[temp-1]*=-1;
}
}
cout<<ans;
return 0;
}

#2

it is compiling check again
code link

#3

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