foo.cpp: In function 'int main()':
foo.cpp:49:14: error: expected ';' before 'g'
         a    g[a][n+1+b]=g[b][n+1+a]=maxint;
              ^
foo.cpp:49:44: warning: statement has no effect [-Wunused-value]
         a    g[a][n+1+b]=g[b][n+1+a]=maxint;
                                            ^