Compilare: main.cpp: In function 'int main()': main.cpp:38:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 38 | if(ctc[nrc].size()>M) M=ctc[nrc].size(),X=nrc; | ~~~~~~~~~~~~~~~^~ main.cpp:25:19: warning: 'X' may be used uninitialized in this function [-Wmaybe-uninitialized] 25 | int x,y,i,M=0,X; | ^