Compilare: main.cpp: In function 'int main()': main.cpp:27:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[c[p]].size();i++) ~^~~~~~~~~~~~~~~ main.cpp:53:1: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:59:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' return 0; ^~~~~~