foo.c: In function 'main':
foo.c:25:4: error: expected ';' before '}' token
    }
    ^
foo.c:14:6: warning: unused variable 'sum' [-Wunused-variable]
  int sum=0;
      ^~~
foo.c: In function 'max':
foo.c:10:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
foo.c: In function 'main':
foo.c:16:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &T, &M);
  ^~~~~~~~~~~~~~~~~~~~~~
foo.c:18:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", f + i, g + i);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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