Compilare: main.cpp: In function 'int main()': main.cpp:76:17: warning: unused variable 'y' [-Wunused-variable] int n, m, x, y; ^ main.cpp: In instantiation of 'LCS<T>::LCS(const std::vector<_Tp>&, const std::vector<_Tp>&) [with T = int]': main.cpp:80:19: required from here main.cpp:35:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) main.cpp: In instantiation of 'std::vector<_Tp> LCS<T>::run() [with T = int]': main.cpp:81:26: required from here main.cpp:43:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) main.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < b.size(); j++) main.cpp:72:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.in", "r", stdin); ^ main.cpp:73:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.out", "w", stdout); ^