Compilare: main.cpp: In function 'int main()': main.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:24:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; (1<<j)<=a[i-1]; j++) ~~~~~~^~~~~~~~ main.cpp:35:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; (1<<j)<=a[dr]; j++) ~~~~~~^~~~~~~