Compilare: main.cpp: In function 'int who(int)': main.cpp:62:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] return ans; ^~~ main.cpp: In function 'int main()': main.cpp:40:13: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized] idx += (idx&-idx); ~~~~^~~~~~~~~~~~~ main.cpp:65:5: note: 'idx' was declared here int main() ^~~~ main.cpp:102:37: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] if(query(p)-query(now-1) > p-now+1) ~^~~~