" v[v.size()]=200001; "

change this to v.push_back(200001);

and

" cout<<v.size()<<endl; "

change this to cout<<v.size()-1<<endl;

and your code will get Accepted..

in a vector, last allocation memory is at v[v.size()-1]; v[v.size()] has not been allocated yet...how can you assign a value to it?

moreover it is recommended to declare large arrays/vectors/maps globally rather than in the main function..

The moment you will declare your map, set, and vectors globally, you will get runtime error on test 1 itself...which is what is expected..

I am not sure how it worked for the first 37 cases when u declared them locally though....