Submission #795900

#	Time	Username	Problem	Language	Result	Execution time	Memory
795900		prefixorsuuffiixx	Examination (JOI19_examination)	C++14	100 / 100	1408 ms	6488 KiB

examination

 #include <bits/stdc++.h>
    #pragma GCC target ("avx2")
    #pragma GCC optimize("O3")
    #pragma GCC optimize("Ofast,unroll-loops")


    using namespace std;
    static struct FastInput {
  static constexpr int BUF_SIZE = 1 << 20;
  char buf[BUF_SIZE];
  size_t chars_read = 0;
  size_t buf_pos = 0;
  FILE *in = stdin;
  char cur = 0;

  inline char get_char() {
    if (buf_pos >= chars_read) {
      chars_read = fread(buf, 1, BUF_SIZE, in);
      buf_pos = 0;
      buf[0] = (chars_read == 0 ? -1 : buf[0]);
    }
    return cur = buf[buf_pos++];
  }

  inline void tie(int) {}

  inline explicit operator bool() {
    return cur != -1;
  }

  inline static bool is_blank(char c) {
    return c <= ' ';
  }

  inline bool skip_blanks() {
    while (is_blank(cur) && cur != -1) {
      get_char();
    }
    return cur != -1;
  }

  inline FastInput& operator>>(char& c) {
    skip_blanks();
    c = cur;
    return *this;
  }

  inline FastInput& operator>>(string& s) {
    if (skip_blanks()) {
      s.clear();
      do {
        s += cur;
      } while (!is_blank(get_char()));
    }
    return *this;
  }

  template <typename T>
  inline FastInput& read_integer(T& n) {
    // unsafe, doesn't check that characters are actually digits
    n = 0;
    if (skip_blanks()) {
      int sign = +1;
      if (cur == '-') {
        sign = -1;
        get_char();
      }
      do {
        n += n + (n << 3) + cur - '0';
      } while (!is_blank(get_char()));
      n *= sign;
    }
    return *this;
  }

  template <typename T>
  inline typename enable_if<is_integral<T>::value, FastInput&>::type operator>>(T& n) {
    return read_integer(n);
  }

  #if !defined(_WIN32) || defined(_WIN64)
  inline FastInput& operator>>(__int128& n) {
    return read_integer(n);
  }
  #endif

  template <typename T>
  inline typename enable_if<is_floating_point<T>::value, FastInput&>::type operator>>(T& n) {
    // not sure if really fast, for compatibility only
    n = 0;
    if (skip_blanks()) {
      string s;
      (*this) >> s;
      sscanf(s.c_str(), "%lf", &n);
    }
    return *this;
  }
} fast_input;

#define cin fast_input

    int ans;
    int x,y,z;
    int n,m;

    int main() {
        ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
        int a[100001],b[100001];
        scanf("%d %d" , &n , &m);
        for (int i = 0;i<n;i++)scanf("%d %d" , &a[i] , &b[i]);
        for(int i = 0 ; i < m ; i++){
            ans = 0;
            scanf("%d %d %d" , &x , &y , &z);
            for (int i = 0; i < n; i++)ans += (a[i] >= x & b[i] >= y & a[i]+b[i]>=z);
            printf("%d\n" , ans);
        }
    }

Compilation message (stderr)

examination.cpp: In function 'int main()':
examination.cpp:114:53: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  114 |             for (int i = 0; i < n; i++)ans += (a[i] >= x & b[i] >= y & a[i]+b[i]>=z);
      |                                                ~~~~~^~~~
examination.cpp:114:81: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  114 |             for (int i = 0; i < n; i++)ans += (a[i] >= x & b[i] >= y & a[i]+b[i]>=z);
      |                                                                        ~~~~~~~~~^~~
examination.cpp:109:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |         scanf("%d %d" , &n , &m);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~
examination.cpp:110:37: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |         for (int i = 0;i<n;i++)scanf("%d %d" , &a[i] , &b[i]);
      |                                ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:113:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  113 |             scanf("%d %d %d" , &x , &y , &z);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57