Compilare: main.cpp: In function 'bool OK(int, int)': main.cpp:27:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(a[i][j] == 1) ^~ main.cpp:29:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' return 1; ^~~~~~ main.cpp: In function 'void solve()': main.cpp:45:13: warning: variable 'x' set but not used [-Wunused-but-set-variable] int j,i,x,y; ^