Compilare: main.cpp: In function 'void KMP_bullshit(std::string, std::string, int)': main.cpp:39:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while (i < a.size()) | ~~^~~~~~~~~~ main.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | while (i < s.size()) | ~~^~~~~~~~~~ main.cpp:50:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | if (j == a.size()) | ~~^~~~~~~~~~~ main.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | else if (i < s.size() && a[j] != s[i]) | ~~^~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for (int i = 1; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp: In function 'void clearr()': main.cpp:32:25: warning: iteration 1001 invokes undefined behavior [-Waggressive-loop-optimizations] 32 | check[i][j] = 0; | ~~~~~~~~~~~~^~~ main.cpp:31:27: note: within this loop 31 | for (int j = 1; j <= N; ++j) | ~~^~~~