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0_0_21550952_175.cpp: In function 'int main()':
0_0_21550952_175.cpp:79:64: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, std::pair<int, int> > > >::value_type' has no member named 'clear'
                                   for(int i=0;i<=1000;i++)v[i].clear();
                                                                ^