結果

問題 No.871 かえるのうた
ユーザー ningenMe
提出日時 2019-08-30 22:50:08
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 636 ms / 2,000 ms
コード長 6,173 bytes
コンパイル時間 1,925 ms
コンパイル使用メモリ 178,220 KB
実行使用メモリ 7,808 KB
最終ジャッジ日時 2024-11-30 10:49:16
合計ジャッジ時間 10,400 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
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ファイルパターン 結果
other AC * 49
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define REP(i,n) for(long long i = 0; i < (n); i++)
#define FOR(i, m, n) for(long long i = (m);i < (n); ++i)
#define ALL(obj) (obj).begin(),(obj).end()
#define SPEED cin.tie(0);ios::sync_with_stdio(false);
template<class T> using V = vector<T>;
template<class T, class U> using P = pair<T, U>;
template<class T> using PQ = priority_queue<T>;
template<class T> using PQR = priority_queue<T,vector<T>,greater<T>>;
constexpr long long MOD = (long long)1e9 + 7;
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e15;
constexpr long double PI = 3.1415926535897932384626433;
template <class T> vector<T> make_v(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto make_v(size_t N,T... t){return vector<decltype(make_v(t...))>(N,make_v(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x
    .second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj
    .begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr !
    = obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "")
    << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
template <template <class tmp> class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj
    .end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}
template<class T> class Segment_Tree_Range_Maximum_Query {
public:
size_t N, M;
T ini;
vector<T> node;
Segment_Tree_Range_Maximum_Query(const vector<T> & ar, const T ini) : M(ar.size()), ini(ini) {
for (N = 1; N < M; N *= 2);
node.resize(2 * N - 1, ini);
for (int i = 0; i<M; ++i) node[i + N - 1] = ar[i];
for (int i = N - 2; i >= 0; --i) node[i] = max(node[2 * i + 1], node[2 * i + 2]);
}
Segment_Tree_Range_Maximum_Query(const size_t M, const T ini) : M(M), ini(ini) {
for (N = 1; N < M; N *= 2);
node.resize(2 * N - 1, ini);
}
void update(size_t idx, const T var) {
idx += (N - 1);
node[idx] = var;
while (idx > 0) {
idx = (idx - 1) / 2;
node[idx] = max(node[2 * idx + 1], node[2 * idx + 2]);
}
}
T getvar(const int a, const int b, int k = 0, int l = 0, int r = -1) {
if (r < 0) r = N;
if (r <= a || b <= l) return ini;
if (a <= l && r <= b) return node[k];
T vl = getvar(a, b, 2 * k + 1, l, (l + r) / 2);
T vr = getvar(a, b, 2 * k + 2, (l + r) / 2, r);
return max(vl, vr);
}
T operator[](size_t idx) {
return node[idx + N - 1];
}
T operator[](pair<size_t, size_t> p) {
return getvar(p.first, p.second);
}
void print() {
cout << "{ " << getvar(0, 1);
for (int i = 1; i < M; ++i) cout << ", " << getvar(i, i + 1);
cout << " }" << endl;
}
};
template<class T> class Segment_Tree_Range_Minimum_Query {
size_t N,M;
T ini;
vector<T> node;
public:
Segment_Tree_Range_Minimum_Query(const vector<T> & ar, const T ini) : M(ar.size()), ini(ini) {
for (N = 1; N < M; N *= 2);
node.resize(2 * N - 1, ini);
for (int i = 0; i<M; ++i) node[i + N - 1] = ar[i];
for (int i = N - 2; i >= 0; --i) node[i] = min(node[2 * i + 1], node[2 * i + 2]);
}
Segment_Tree_Range_Minimum_Query(const size_t M, const T ini) : M(M), ini(ini) {
for (N = 1; N < M; N *= 2);
node.resize(2 * N - 1, ini);
}
void update(size_t idx, const T var) {
idx += (N - 1);
node[idx] = var;
while (idx > 0) {
idx = (idx - 1) / 2;
node[idx] = min(node[2 * idx + 1], node[2 * idx + 2]);
}
}
T getvar(const int a, const int b, int k = 0, int l = 0, int r = -1) {
if (r < 0) r = N;
if (r <= a || b <= l) return ini;
if (a <= l && r <= b) return node[k];
T vl = getvar(a, b, 2 * k + 1, l, (l + r) / 2);
T vr = getvar(a, b, 2 * k + 2, (l + r) / 2, r);
return min(vl, vr);
}
T operator[](size_t idx) {
return node[idx + N - 1];
}
T operator[](pair<size_t, size_t> p) {
return getvar(p.first, p.second);
}
void print() {
cout << "{ " << getvar(0, 1);
for (int i = 1; i < M; ++i) cout << ", " << getvar(i, i + 1);
cout << " }" << endl;
}
};
int main() {
int N,K,idx; cin >> N >> K;
K;
vector<ll> X(N+2,0),A(N+2,0);
vector<int> L(N+2),R(N+2);
for(int i = 1; i <= N; ++i) cin >> X[i];
for(int i = 1; i <= N; ++i) cin >> A[i];
X[N+1] = HIGHINF;
X[0] = -HIGHINF;
for(int i = 1; i < N+1; ++i) R[i] = (upper_bound(ALL(X),X[i]+A[i]) - X.begin()) - 1;
for(int i = 1; i < N+1; ++i) L[i] = (lower_bound(ALL(X),X[i]-A[i]) - X.begin());
R[N+1] = L[N+1] = N+1;
R[0] = L[0] = 0;
Segment_Tree_Range_Maximum_Query<int> SegR(R,-1234567);
Segment_Tree_Range_Minimum_Query<int> SegL(L,1234567);
int l = K,r = K;
for(int i = 0; i <= 10*N; ++i){
int tmpr = SegR.getvar(l,r+1);
int tmpl = SegL.getvar(l,r+1);
chmax(r,tmpr);
chmin(l,tmpl);
}
cout << r - l + 1 << endl;
return 0;
}
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