Compilare: user.cpp: In function ‘void readinput()’: user.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < N - 1; i++ ) ^ user.cpp:23:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 1; i <= N; i++ ) ^ user.cpp: In function ‘void go(unsigned int)’: user.cpp:31:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i <= arb[rad][0]; i++ ) ^ user.cpp:37:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i <= arb[rad][0]; i++ ) ^ user.cpp: In function ‘void writeoutput()’: user.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 1; i <= K; i++ ) ^