Compilare: main.cpp: In function 'void backt(int)': main.cpp:15:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<litere.size();i++) | ~^~~~~~~~~~~~~~ main.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i =0; i<litere.size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:18: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[100]' [-Wformat=] 47 | scanf(" %s ", &s); | ~^ ~~ | | | | | char (*)[100] | char*