Compilare: main.cpp: In function 'bool check(int, int)': main.cpp:9:9: warning: unused variable 'i' [-Wunused-variable] int i,j,ok=0,x=dst[a][b]; ^ main.cpp:9:13: warning: unused variable 'ok' [-Wunused-variable] int i,j,ok=0,x=dst[a][b]; ^~ main.cpp: In function 'int main()': main.cpp:30:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=1;j<=n;++j) cout<<dst[i][j]<<" "; cout<<endl; ^~~ main.cpp:30:49: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(j=1;j<=n;++j) cout<<dst[i][j]<<" "; cout<<endl; ^~~~