Compilare: user.cpp: In function ‘int main()’: user.cpp:20:17: warning: this ‘while’ clause does not guard... [-Wmisleading-indentation] while(mat[i][c]) ^~~~~ user.cpp:22:19: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘while’ vl[1]+=i-1;vc[1]+=j-1;x1[l]++;x2[i-1]++;y1[c]++;y2[j-1]++; ^~ user.cpp:39:21: warning: ‘s2’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<s1<<' '<<s2; ^ user.cpp:39:14: warning: ‘s1’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<s1<<' '<<s2; ^~~