Compilare: user.cpp: In function ‘void Show()’: user.cpp:17:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n; ++i) ^ user.cpp:25:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:40:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n*(n+1)/2; ++i) f >> a[i]; ^ user.cpp:41:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = (n-1)*(n-1)/2 + 1; i <= n*(n+1)/2; ++i) b[i] = 1; ^ user.cpp:73:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = st; k <= dr; ++k) ^ user.cpp:76:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n - 2; ++i) ^ user.cpp:81:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(b[j1] >= st2) ^ user.cpp:75:17: warning: variable ‘j’ set but not used [-Wunused-but-set-variable] int j = 1, j1, j2, st2 = k, poz = 1; ^