Compilare: main.cpp: In function 'int precalc()': main.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int solve(int, int)': main.cpp:76:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); i++) ~^~~~~~~~~ main.cpp:80:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] return ans; ^~~