Compilare: main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::pair<_T1, _T2>)': main.cpp:7:36: warning: no return statement in function returning non-void [-Wreturn-type] ifstream in("strmatch.in"); ^ main.cpp: In function 'std::ostream& operator<<(std::ostream&, const Container<Types ...>&)': main.cpp:8:85: warning: this 'for' clause does not guard... [-Wmisleading-indentation] ofstream out("strmatch.out"); ^ main.cpp:9:26: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' ^ main.cpp: In function 'std::vector<int> kmpPre(std::__cxx11::string)': main.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < s.size(); i++) { ~~^~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == t.size()) { ~~^~~~~~~~~~~