Compilare: main.cpp: In function 'int main()': main.cpp:50:62: warning: array subscript has type 'char' [-Wchar-subscripts] 50 | hash_a1 = ((long long)P1 * hash_a1 % MOD1 + value[a[i]]) % MOD1; | ~~~^ main.cpp:51:62: warning: array subscript has type 'char' [-Wchar-subscripts] 51 | hash_a2 = ((long long)P2 * hash_a2 % MOD2 + value[a[i]]) % MOD2; | ~~~^ main.cpp:60:62: warning: array subscript has type 'char' [-Wchar-subscripts] 60 | hash_b1 = ((long long)P1 * hash_b1 % MOD1 + value[b[i]]) % MOD1; | ~~~^ main.cpp:61:62: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | hash_b2 = ((long long)P2 * hash_b2 % MOD2 + value[b[i]]) % MOD2; | ~~~^ main.cpp:73:65: warning: array subscript has type 'char' [-Wchar-subscripts] 73 | hash_b1 = ((long long)hash_b1 - (long long)value[b[i - N]] * p1 % MOD1 + MOD1) % MOD1; | ~~~~~~~^ main.cpp:74:65: warning: array subscript has type 'char' [-Wchar-subscripts] 74 | hash_b2 = ((long long)hash_b2 - (long long)value[b[i - N]] * p2 % MOD2 + MOD2) % MOD2; | ~~~~~~~^ main.cpp:76:62: warning: array subscript has type 'char' [-Wchar-subscripts] 76 | hash_b1 = ((long long)hash_b1 * P1 % MOD1 + value[b[i]]) % MOD1; | ~~~^ main.cpp:77:62: warning: array subscript has type 'char' [-Wchar-subscripts] 77 | hash_b2 = ((long long)hash_b2 * P2 % MOD2 + value[b[i]]) % MOD2; | ~~~^ main.cpp:87:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for(int i = 0; i < ans.size(); i++) { | ~~^~~~~~~~~~~~