結果
問題 | No.871 かえるのうた |
ユーザー | rokahikou1 |
提出日時 | 2021-02-26 15:11:14 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 32 ms / 2,000 ms |
コード長 | 5,760 bytes |
コンパイル時間 | 1,616 ms |
コンパイル使用メモリ | 169,156 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-07 16:42:29 |
合計ジャッジ時間 | 3,682 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 5 ms
5,376 KB |
testcase_13 | AC | 3 ms
5,376 KB |
testcase_14 | AC | 30 ms
5,376 KB |
testcase_15 | AC | 29 ms
5,376 KB |
testcase_16 | AC | 32 ms
5,376 KB |
testcase_17 | AC | 27 ms
5,376 KB |
testcase_18 | AC | 6 ms
5,376 KB |
testcase_19 | AC | 30 ms
5,376 KB |
testcase_20 | AC | 4 ms
5,376 KB |
testcase_21 | AC | 12 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 3 ms
5,376 KB |
testcase_27 | AC | 4 ms
5,376 KB |
testcase_28 | AC | 1 ms
5,376 KB |
testcase_29 | AC | 11 ms
5,376 KB |
testcase_30 | AC | 17 ms
5,376 KB |
testcase_31 | AC | 2 ms
5,376 KB |
testcase_32 | AC | 16 ms
5,376 KB |
testcase_33 | AC | 24 ms
5,376 KB |
testcase_34 | AC | 7 ms
5,376 KB |
testcase_35 | AC | 15 ms
5,376 KB |
testcase_36 | AC | 20 ms
5,376 KB |
testcase_37 | AC | 13 ms
5,376 KB |
testcase_38 | AC | 27 ms
5,376 KB |
testcase_39 | AC | 25 ms
5,376 KB |
testcase_40 | AC | 10 ms
5,376 KB |
testcase_41 | AC | 1 ms
5,376 KB |
testcase_42 | AC | 11 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | AC | 2 ms
5,376 KB |
testcase_45 | AC | 2 ms
5,376 KB |
testcase_46 | AC | 2 ms
5,376 KB |
testcase_47 | AC | 2 ms
5,376 KB |
testcase_48 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> #define rep(i, n) for(int(i) = 0; (i) < (n); (i)++) #define FOR(i, m, n) for(int(i) = (m); (i) < (n); (i)++) #define ALL(v) (v).begin(), (v).end() #define LLA(v) (v).rbegin(), (v).rend() #define SZ(v) (v).size() #define INT(...) \ int __VA_ARGS__; \ read(__VA_ARGS__) #define LL(...) \ ll __VA_ARGS__; \ read(__VA_ARGS__) #define DOUBLE(...) \ double __VA_ARGS__; \ read(__VA_ARGS__) #define CHAR(...) \ char __VA_ARGS__; \ read(__VA_ARGS__) #define STRING(...) \ string __VA_ARGS__; \ read(__VA_ARGS__) #define VEC(type, name, size) \ vector<type> name(size); \ read(name) using namespace std; using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using Graph = vector<vector<int>>; template <typename T> struct edge { int to; T cost; edge(int t, T c) : to(t), cost(c) {} }; template <typename T> using WGraph = vector<vector<edge<T>>>; const int INF = 1 << 30; const ll LINF = 1LL << 60; const int MOD = 1e9 + 7; template <class T> inline vector<T> make_vec(size_t a, T val) { return vector<T>(a, val); } template <class... Ts> inline auto make_vec(size_t a, Ts... ts) { return vector<decltype(make_vec(ts...))>(a, make_vec(ts...)); } void read() {} template <class T> inline void read(T &a) { cin >> a; } template <class T, class S> inline void read(pair<T, S> &p) { read(p.first), read(p.second); } template <class T> inline void read(vector<T> &v) { for(auto &a : v) read(a); } template <class Head, class... Tail> inline void read(Head &head, Tail &...tail) { read(head), read(tail...); } template <class T> inline void chmax(T &a, T b) { (a < b ? a = b : a); } template <class T> inline void chmin(T &a, T b) { (a > b ? a = b : a); } /** * @brief Manage interval by set. Note that interval is harf-open [l,r). * * @tparam T Universal set. */ template <typename T> class IntervalSet : std::set<std::pair<T, T>> { private: const T INF = std::numeric_limits<T>::max() - 65; bool isMergeAdjacent; public: /** * @brief Construct a new Interval Set object * * @param f If merge adjacent interval */ IntervalSet(bool f) : isMergeAdjacent(f) { this->emplace(-INF, -INF + 1); this->emplace(INF, INF + 1); } /** * @brief Get a interval to which p belongs. * * @param p Element in T * @return Iterator of interval to which p belongs. If not exists, return * iterator end(). */ auto get(T p) const { auto it = this->upper_bound({p, INF}); if(it == this->begin() || (--it)->second < p) return this->end(); return it; } /** * @brief Insert interval [l,r). * * @param l Left end of interval. * @param r Right end of interval. */ void insert(T l, T r) { assert(l < r); auto it = std::prev(this->lower_bound({l, r})); if(it->first <= l && l + !isMergeAdjacent <= it->second) { l = std::min(l, it->first); r = std::max(r, it->second); this->erase(it); } it = this->lower_bound({l, r}); while(1) { if(l <= it->first && it->first <= r) { r = std::max(r, it->second); it = this->erase(it); } else break; } this->emplace(l, r); } // /** // * @brief Remove interval [l,r). // * // * @param l Left end of interval. // * @param r Right end of interval. // */ // void remove(T l, T r) { assert(l < r); } /** * @brief Judge if p and q are in same interval. * * @param p Element in T. * @param q Element in T. * @return If p and q are in same interval. */ bool same(T p, T q) const { auto it = get(p); return it != this->end() && it->first <= q && q <= it->second; } /** * @brief Show contents of set. * */ void dump() { for(auto it = this->begin(), e = this->end(); it != e; ++it) { if(std::abs(it->first) == INF) continue; std::cout << "[" << it->first << "," << it->second << (it == std::prev(std::prev(e)) ? ")" : "), "); } std::cout << std::endl; } }; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); INT(n, k); k--; VEC(ll, x, n); VEC(ll, a, n); int lcur = k - 1, rcur = k + 1; ll left = x[k] - a[k], right = x[k] + a[k]; int res = 1; int find = 0; while(1) { find = 0; if(lcur >= 0 && left <= x[lcur]) { chmin(left, x[lcur] - a[lcur]); chmax(right, x[lcur] + a[lcur]); lcur--; find++; } if(rcur < n && x[rcur] <= right) { chmin(left, x[rcur] - a[rcur]); chmax(right, x[rcur] + a[rcur]); rcur++; find++; } res += find; if(find == 0) break; } cout << res << endl; }