Compilare: main.cpp: In function 'int main()': main.cpp:49:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(heap.size() < V[i].first){ ~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:42:9: warning: unused variable 't' [-Wunused-variable] int t,i,j; ^ main.cpp:42:13: warning: unused variable 'j' [-Wunused-variable] int t,i,j; ^