Compilare: main.cpp: In function 'void lee(int, int)': main.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<lista[xx][yy].size();j++) ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:27:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int j=0;j<lista[xx][yy].size();j++) ^~~ main.cpp:35:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' lista[xx][yy].clear(); ^~~~~ main.cpp: In function 'int32_t main()': main.cpp:55:13: warning: unused variable 'k' [-Wunused-variable] int i,j,k,cod,xi,yi,sol=0; ^