Compilare: main.cpp: In function 'int main()': main.cpp:74:94: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 74 | if (fr[s[i] - 'a'] != 0 and f[s[i] - 'a'] + poz[s[i] - 'a'].size() - unde[i] == fr[s[i] - 'a']) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:86:70: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for (; poz[j - 'a'][ind] < bound and ind < poz[j - 'a'].size(); ind++); | ~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:87:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (; ind < poz[j - 'a'].size() and poz[j - 'a'][ind] < i and f[j - 'a'] < fr[j - 'a']; ind++) | ~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:89:37: warning: unused variable 'x' [-Wunused-variable] 89 | int x = poz[j - 'a'][ind]; | ^ main.cpp:94:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 94 | if (ind == poz[j - 'a'].size()) | ~~~~^~~~~~~~~~~~~~~~~~~~~~