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- long long range(long long x,long long n)
- {
- vector<long long>op;
- op.push_back(x);
- sort(op.begin(),op.end());
- long long pre=1,final=op[1]-1,sum=0;
- for(i=0;i<op.size()-1;i++)
- {
- sum=sum+pre+final;
- pre=op[i]+1;
- final=op[i+2]-1;
- }
- long long k=op.size();
- sum+=op[k-2]+1+N;
- return sum;
- }
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