Compilare: main.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 12 | main() | ^~~~ main.cpp: In function 'int main()': main.cpp:50:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int j=0; j<upd[i].size(); ++j) | ~^~~~~~~~~~~~~~ main.cpp:38:13: warning: unused variable 'cnt' [-Wunused-variable] 38 | int cnt=0; | ^~~