Compilare: user.cpp: In member function ‘std::pair<int, int> SufA::range(const string&)’: user.cpp:149:29: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] next = lr == elcp[i+lr] < cp; ^ user.cpp:152:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (cp < t.size() && t[cp] == s[k+cp]) cp++; ^ user.cpp:153:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cp == t.size()) { ^ user.cpp:177:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cp < t.size()) { ^ user.cpp:183:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (elcp[i-1] < t.size()) { ^ user.cpp:197:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (elcp[i] < t.size()) { ^ user.cpp: In instantiation of ‘void SufA::sais(int, const T&, int) [with T = std::basic_string<char>]’: user.cpp:106:29: required from here user.cpp:24:5: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] || s[i] == s[i+1] && t[i+1]; ^ user.cpp: In instantiation of ‘void SufA::sais(int, const T&, int) [with T = int*]’: user.cpp:84:22: required from ‘void SufA::sais(int, const T&, int) [with T = std::basic_string<char>]’ user.cpp:106:29: required from here user.cpp:24:5: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] user.cpp: In function ‘int main()’: user.cpp:219:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in", "r", stdin); ^ user.cpp:220:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.out", "w", stdout); ^