Compilare: user.cpp: In function ‘int main()’: user.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=fact.size(); i++) ^ user.cpp:18:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n < fact[i]) fac = i-1, i=20; ^ user.cpp:23:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=fact.size()+1; i++) ^ user.cpp:24:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n < fact[i]) fac = i-1, i=20; ^ user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=fact.size()+1; i++) ^ user.cpp:27:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n == i*fact[fac]) nrfac = i, i=20; ^ user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(n < i*fact[fac]) nrfac = i-1, i=20; ^ user.cpp:34:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=x; i++) ^