Compilare: user.cpp: In function ‘int countCoverage(std::vector<int>, std::vector<int>)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < line.size(); i++) ^ user.cpp: In function ‘int countUnique(std::vector<std::vector<int> >, int)’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < array.size(); i++) ^ user.cpp:27:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < array.size() && sum < 2; j++) ^ user.cpp: In function ‘bool all_off(std::vector<int>)’: user.cpp:39:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:75:9: warning: ‘maxIndex’ may be used uninitialized in this function [-Wmaybe-uninitialized] int maxIndex, maxCoverage = 0, maxUnique = -1; ^