Compilare: main.cpp: In function 'int main()': main.cpp:29:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ~^~~ main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1;j<=n;j++) ~^~~ main.cpp:39:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[j]<=i) ~~~~^~~ main.cpp:27:15: warning: unused variable 'x' [-Wunused-variable] long long x; ^