Compilare: main.cpp: In function 'void afis()': main.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=nr;i++) ~^~~~ main.cpp: In function 'int main()': main.cpp:43:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i]>i) ~~~~^~