/in/foo.cc: In function 'int main()':
/in/foo.cc:17:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
         if(m&1 == 1){
             ^
/in/foo.cc:7:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
/in/foo.cc:9:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&m);
                       ^
/in/foo.cc:12:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
                 scanf("%d",&matrix[i][j]);
                                          ^