Compilare: user.cpp: In function ‘int cmlsc(std::string, std::string)’: user.cpp:29:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= y.size(); i++) ^ user.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= x.size(); i++) ^ user.cpp:33:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= x.size(); i++) ^ user.cpp:34:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j <= y.size(); j++) ^ user.cpp: In function ‘void solve()’: user.cpp:49:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size()-2; i++) ^ user.cpp:55:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:18:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, 110, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:62:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("randuri.in", "r", stdin); ^ user.cpp:63:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("randuri.out", "w", stdout); ^