#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,k,i;
int a[100010];
long long ans;
cin>>n>>k;ans=0;
for(i=1;i<=n;i++)
scanf("%d",&a[i]);
sort(a+1,a+1+n);
for(i=1;i<=k;i++)
ans+=a[i]+i-1;
cout<<ans<<endl;
return 0;
}
./Main.cpp: In function ‘int main()’:
./Main.cpp:10:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&a[i]);
^