/in/foo.cc: In function 'int main()':
/in/foo.cc:54:15: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
    if(b[i][j] == b[j][i] == 1 && i != j)
       ~~~~~~~~^~~~~~~~~~
/in/foo.cc:54:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
    if(b[i][j] == b[j][i] == 1 && i != j)
      ^
/in/foo.cc:63:45: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
     if(c[i][j]<(c[i][k]+c[k][j]) && b[i][k] == b[k][j] == 1 && i!= j)
                                     ~~~~~~~~^~~~~~~~~~