Compilare: user.cpp: In function ‘int main()’: user.cpp:69:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(dr[ii][jj] < v[ii][jj].size() && v[ii][jj][ dr[ii][jj] ].en <= i){ ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dr[ii][jj] < v[ii][jj].size() && v[ii][jj][ dr[ii][jj] ].en > i){ ^ user.cpp:150:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(dr[ii][jj] < v[ii][jj].size() && v[ii][jj][ dr[ii][jj] ].en < i){ ^ user.cpp:153:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dr[ii][jj] >= v[ii][jj].size() || v[ii][jj][ dr[ii][jj] ].en <= n || v[ii][jj][ dr[ii][jj] ].t != 1){ ^