Compilare: main.cpp: In function 'int main()': main.cpp:33:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (int i = 0; i < A.size(); i++) { | ~~^~~~~~~~~~ main.cpp:34:26: warning: array subscript has type 'char' [-Wchar-subscripts] 34 | hA1 = (hA1 * P + F[A[i]]) % MOD1; | ^ main.cpp:35:26: warning: array subscript has type 'char' [-Wchar-subscripts] 35 | hA2 = (hA2 * P + F[A[i]]) % MOD2; | ^ main.cpp:45:26: warning: array subscript has type 'char' [-Wchar-subscripts] 45 | hB1 = (hB1 * P + F[B[i]]) % MOD1; | ^ main.cpp:46:26: warning: array subscript has type 'char' [-Wchar-subscripts] 46 | hB2 = (hB2 * P + F[B[i]]) % MOD2; | ^ main.cpp:54:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i = A.size(); i < B.size(); i++) { | ~~^~~~~~~~~~ main.cpp:55:35: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | hB1 = ((hB1 - (F[B[i - A.size()]] * p1) % MOD1 + MOD1) * P + F[B[i]]) % MOD1; | ^ main.cpp:55:70: warning: array subscript has type 'char' [-Wchar-subscripts] 55 | hB1 = ((hB1 - (F[B[i - A.size()]] * p1) % MOD1 + MOD1) * P + F[B[i]]) % MOD1; | ^ main.cpp:56:35: warning: array subscript has type 'char' [-Wchar-subscripts] 56 | hB2 = ((hB2 - (F[B[i - A.size()]] * p2) % MOD2 + MOD2) * P + F[B[i]]) % MOD2; | ^ main.cpp:56:70: warning: array subscript has type 'char' [-Wchar-subscripts] 56 | hB2 = ((hB2 - (F[B[i - A.size()]] * p2) % MOD2 + MOD2) * P + F[B[i]]) % MOD2; | ^ main.cpp:65:20: 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 = 0; i < B.size() && nr < 1000; i++) | ~~^~~~~~~~~~