Compilare: user.cpp: In function ‘int main()’: user.cpp:42:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < n; i++) ^ user.cpp:58:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < m; i++) ^ user.cpp:66:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( k == n - 1 ) ^ user.cpp:76:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < 1000 && i < positions.size()) ^ user.cpp:54:9: warning: variable ‘match_text’ set but not used [-Wunused-but-set-variable] int match_text[m+2]; ^