結果
| 問題 |
No.1496 不思議な数え上げ
|
| コンテスト | |
| ユーザー |
fastmath
|
| 提出日時 | 2021-04-30 23:12:38 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 127 ms / 3,000 ms |
| コード長 | 3,773 bytes |
| コンパイル時間 | 1,390 ms |
| コンパイル使用メモリ | 130,644 KB |
| 最終ジャッジ日時 | 2025-01-21 04:32:23 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 39 |
ソースコード
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <fstream>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define x first
#define y second
#define Time (double)clock()/CLOCKS_PER_SEC
#define debug(x) std::cerr << #x << ": " << x << '\n';
#define FOR(i, n) for (int i = 0; i < n; ++i)
#define FORN(i, n) for (int i = 1; i <= n; ++i)
#define pb push_back
#define trav(a, x) for (auto& a : x)
using vi = vector<int>;
template <typename T>
std::istream& operator >>(std::istream& input, std::vector<T>& data)
{
for (T& x : data)
input >> x;
return input;
}
template <typename T>
std::ostream& operator <<(std::ostream& output, const pair <T, T> & data)
{
output << "(" << data.x << "," << data.y << ")";
return output;
}
template <typename T>
std::ostream& operator <<(std::ostream& output, const std::vector<T>& data)
{
for (const T& x : data)
output << x << " ";
return output;
}
ll div_up(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll div_down(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
ll math_mod(ll a, ll b) { return a - b * div_down(a, b); }
#define tcT template<class T
#define tcTU tcT, class U
tcT> using V = vector<T>;
tcT> void re(V<T>& x) {
trav(a, x)
cin >> a;
}
tcT> bool ckmin(T& a, const T& b) {
return b < a ? a = b, 1 : 0;
} // set a = min(a,b)
tcT> bool ckmax(T& a, const T& b) {
return a < b ? a = b, 1 : 0;
}
ll gcd(ll a, ll b) {
while (b) {
tie(a, b) = mp(b, a % b);
}
return a;
}
signed main() {
#ifdef LOCAL
#else
#define endl '\n'
ios_base::sync_with_stdio(0); cin.tie(0);
#endif
int n;
cin >> n;
vi p(n);
cin >> p;
vi l(n, -1), r(n, n);
vi pos(n + 1);
FOR (i, n) {
pos[p[i]] = i;
}
vi s;
FOR (i, n) {
while (s.size() && p[s.back()] > p[i]) {
s.pop_back();
}
if (s.size()) {
l[i] = s.back();
}
s.app(i);
}
s.clear();
for (int i= n - 1; i >= 0; --i) {
while (s.size() && p[s.back()] > p[i]) {
s.pop_back();
}
if (s.size()) {
r[i] = s.back();
}
s.app(i);
}
vi pref(n + 1);
FOR (i, n) {
pref[i + 1] = pref[i] + p[i];
}
FORN (x, n) {
int up;
cin >> up;
int i = pos[x];
int ans = 0;
if (i - l[i] < r[i] - i) {
for (int L = l[i] + 1; L <= i; ++L) {
//pref[r] - pref[l] <= up
ans += upper_bound(pref.begin() + i + 1, pref.begin() + r[i] + 1, up + pref[L]) - (pref.begin() + i + 1);
}
}
else {
for (int R = i; R < r[i]; ++R) {
//pref[r + 1] - pref[l] <= up
//pref[r + 1] - up <= pref[l]
int lll = l[i];
int rrr = i + 1;
while (lll < rrr - 1) {
int m = (lll + rrr) / 2;
if (pref[R + 1] - pref[m] > up) {
lll = m;
}
else {
rrr = m;
}
}
ans += i + 1 - rrr;
}
}
cout << ans << endl;
}
}
fastmath