Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:11:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(i=0;i<vct[k].size();++i){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'int rmq(int, int)': main.cpp:29:27: warning: statement has no effect [-Wunused-value] 29 | else mat[p][y-ptr[p]+1]; | ~~~~~~~~~~~~~~~~~^ main.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type] 30 | } | ^ main.cpp: In function 'int main()': main.cpp:67:26: warning: 'mq' may be used uninitialized [-Wmaybe-uninitialized] 67 | g<<ma<<' '<<mp<<' '<<mq; | ^~ main.cpp:54:17: note: 'mq' was declared here 54 | int ma=0,mp,mq; | ^~ main.cpp:67:21: warning: 'mp' may be used uninitialized [-Wmaybe-uninitialized] 67 | g<<ma<<' '<<mp<<' '<<mq; | ^~~ main.cpp:54:14: note: 'mp' was declared here 54 | int ma=0,mp,mq; | ^~