Compilare: user.cpp: In function ‘void uniform()’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp:50: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void comp(std::vector<std::pair<std::pair<int, int>, int>, std::allocator<std::pair<std::pair<int, int>, int> > >, int&, std::pair<std::pair<int, int>, int>, int, int)’: user.cpp:80: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:129: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result