Compilare: user.cpp: In function ‘void citire()’: user.cpp:14:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i <= n; i++) ^ user.cpp: In function ‘void debug()’: user.cpp:21:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < n; i++) ^ user.cpp:23:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < n; j++) ^ user.cpp: In function ‘void solve()’: user.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i < n; i++) ^ user.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 1; j <= n-i; j++) ^ user.cpp:47:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k; ^