Compilare: main.cpp: In function 'int dl(char*, char*)': main.cpp:17:37: warning: unused variable 'mv' [-Wunused-variable] 17 | int i,j,n=strlen(a),m=strlen(b),mv; | ^~ main.cpp: In function 'int main()': main.cpp:56:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(j=0;j<a[i].size();j++) | ~^~~~~~~~~~~~