Compilare: user.cpp: In function ‘int main()’: user.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0 ; i < x.size() ; ++i) ~~^~~~~~~~~~ user.cpp:15:3: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (int i = 0 ; i < x.size() ; ++i) ^~~ user.cpp:24:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ fout << 1LL * min(nL,nR) * min(nU,nD) << "\n"; ^~~~