Compilare: user.cpp: In function ‘int main()’: user.cpp:44:98: warning: right operand of comma operator has no effect [-Wunused-value] if(i<n and viz[i+1][j]==0)c.push(make_pair(i+1,make_pair(j,ok+1))),viz[i+1][j]; ^ user.cpp:45:98: warning: right operand of comma operator has no effect [-Wunused-value] if(i>1 and viz[i-1][j]==0)c.push(make_pair(i-1,make_pair(j,ok+1))),viz[i-1][j]; ^ user.cpp:46:98: warning: right operand of comma operator has no effect [-Wunused-value] if(j<n and viz[i][j+1]==0)c.push(make_pair(i,make_pair(j+1,ok+1))),viz[i][j+1]; ^ user.cpp:47:98: warning: right operand of comma operator has no effect [-Wunused-value] if(j>1 and viz[i][j-1]==0)c.push(make_pair(i,make_pair(j-1,ok+1))),viz[i][j-1]; ^