Compilare: main.cpp: In function 'int main()': main.cpp:55:21: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=] 55 | fprintf(fout, "%d\n", contor.size()); | ~^ ~~~~~~~~~~~~~ | | | | int std::vector<int>::size_type {aka long unsigned int} | %ld main.cpp:16:16: warning: unused variable 'lenA' [-Wunused-variable] 16 | int len=0, lenA=strlen(a); | ^~~~