#966905 (C++17) No.2710 How many more?

• 問題: No.2710 How many more?
• ユーザー: 👑 binap
• 提出日時: 2024-03-31 14:11:37
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 263 ms / 2,000 ms
• コード長: 2,414 bytes
• コンパイル時間: 4,036 ms
• コンパイル使用メモリ: 268,920 KB
• 実行使用メモリ: 6,820 KB
• 最終ジャッジ日時: 2024-09-30 19:07:22
• 合計ジャッジ時間: 7,947 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 6,820 KB
testcase_01	AC	2 ms; 6,816 KB
testcase_02	AC	212 ms; 6,816 KB
testcase_03	AC	128 ms; 6,820 KB
testcase_04	AC	100 ms; 6,820 KB
testcase_05	AC	74 ms; 6,816 KB
testcase_06	AC	86 ms; 6,816 KB
testcase_07	AC	86 ms; 6,816 KB
testcase_08	AC	69 ms; 6,816 KB
testcase_09	AC	181 ms; 6,820 KB
testcase_10	AC	103 ms; 6,816 KB
testcase_11	AC	167 ms; 6,816 KB
testcase_12	AC	235 ms; 6,816 KB
testcase_13	AC	257 ms; 6,816 KB
testcase_14	AC	257 ms; 6,816 KB
testcase_15	AC	256 ms; 6,820 KB
testcase_16	AC	251 ms; 6,820 KB
testcase_17	AC	263 ms; 6,816 KB
testcase_18	AC	1 ms; 6,816 KB

ソースコード

#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;

ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}

template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}

// Coodinate Compression
// https://youtu.be/fR3W5IcBGLQ?t=8550
template<typename T=int>
struct CC {
  bool initialized;
  vector<T> xs;
  CC(): initialized(false) {}
  void add(T x) { xs.push_back(x);}
  void init() {
    sort(xs.begin(), xs.end());
    xs.erase(unique(xs.begin(),xs.end()),xs.end());
    initialized = true;
  }
  int operator()(T x) {
    if (!initialized) init();
    return upper_bound(xs.begin(), xs.end(), x) - xs.begin() - 1;
  }
  T operator[](int i) {
    if (!initialized) init();
    return xs[i];
  }
  int size() {
    if (!initialized) init();
    return xs.size();
  }
};

using S = int;
S op(S a, S b){return a + b;}
S e(){return 0;}

int main(){
	int n, q;
	cin >> n >> q;
	vector<int> a(n);
	cin >> a;
	rep(i, n) a[i] *= -1;
	CC<int> cc;
	rep(i, n) cc.add(a[i]);
	segtree<int, op, e> seg(cc.size());
	rep(i, n){
		int idx = cc(a[i]);
		seg.set(idx, seg.get(idx) + 1);
	}
	rep(i, q){
		int x, y;
		cin >> x >> y;
		x--; y--;
		int ix = cc(a[x]);
		int iy = cc(a[y]);
		if(ix < iy) cout << seg.prod(ix + 1, iy) << "\n";
		else cout << "0\n";
	}
	return 0;
}