Compilare: main.cpp: In function 'int c1()': main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:39:44: warning: self-comparison always evaluates to false [-Wtautological-compare] else if (d[p.first-1][p.second]>d[p.first-1][p.second]) ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:51:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int c2()': main.cpp:56:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^