Compilare: user.cpp: In function ‘int main()’: user.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=k; i++) ^ user.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<n; j++) ^ user.cpp:47:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(t=1; t<=timp; t++) ^ user.cpp:73:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=2; j<=n; j++) ^ user.cpp:86:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=n; i++) ^