Compilare: user.cpp: In function ‘int main()’: user.cpp:35:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= pattern.size(); i++) ^ user.cpp:50:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (first[i+j].back() != pattern.size()) ^ user.cpp:54:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (first[i+j][0] != pattern.size()) ^ user.cpp:40:13: warning: unused variable ‘nr_sol’ [-Wunused-variable] int nr_sol = 0; ^ user.cpp:72:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < text.size(); i++) ^ user.cpp:15:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.in", "r", stdin); ^ user.cpp:16:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.out", "w", stdout); ^