Compilare: user.cpp: In function ‘int main()’: user.cpp:43:43: warning: ‘y’ is used uninitialized in this function [-Wuninitialized] c[2]=make_pair(make_pair(x+dx[dr[1]],y+dy[dr[1]]),1); ^ user.cpp:43:31: warning: ‘x’ is used uninitialized in this function [-Wuninitialized] c[2]=make_pair(make_pair(x+dx[dr[1]],y+dy[dr[1]]),1); ^