Compilare: user.cpp: In function ‘void fa(int, int)’: user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<poz[i].size(); ++j) update(1,1,VM,poz[i][j],poz[i][j]+dy-1,1); ^ user.cpp:38:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<poz[i-dx].size(); ++j) update(1,1,VM,poz[i-dx][j],poz[i-dx][j]+dy-1,-1); ^ user.cpp:46:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<poz[i].size(); ++j) update(1,1,VM,poz[i][j],poz[i][j]+dy-1,1); ^ user.cpp:48:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<poz[i+dx].size(); ++j) update(1,1,VM,poz[i+dx][j],poz[i+dx][j]+dy-1,-1); ^