foo.cc: In function 'int query(int, int)':
foo.cc:67:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    if (tx > cnt || tx == cnt && a[i] < cur) {
                    ~~~~~~~~~~^~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:78:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~
foo.cc:79:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; i ++) scanf("%d", &a[i]), san[i] = a[i];
                                ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
foo.cc:89:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &l, &r);
   ~~~~~^~~~~~~~~~~~~~~~

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