Compilare: main.cpp: In function 'int main()': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~ main.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1;j<=n;j++) ~^~~ main.cpp:24:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j]<v[i] and ultim[v[j]]==j) ~~~~~~~~~~~^~~ main.cpp:24:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(v[j]<v[i] and ultim[v[j]]==j) ^ main.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ~^~~