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int left=min_diff,right=max_diff,mid;
int gval,slope;
while(left<=right) {
	mid=(left+right)/2;
	//kurangi semua dengan mid
	//monotone decreasing: cari MAXIMUM G(n)
	//monotone increasing; cari MINIMUM G(n)
	//cari elemen minimum untuk dapat sekian (cnt)
	if(cnt<=k) {
		slope=mid;
		gval=G(opt);
		//decreasing: right=mid-1, increasing: left=mid+1
	}
	else	//kebalikan dari sebelumnya
}
cout<<gval+k*slope<<"\n";
 

prog.cpp:1:10: error: ‘min_diff’ was not declared in this scope
 int left=min_diff,right=max_diff,mid;
          ^~~~~~~~
prog.cpp:3:1: error: expected unqualified-id before ‘while’
 while(left<=right) {
 ^~~~~

Standard output is empty