結果
| 問題 |
No.801 エレベーター
|
| コンテスト | |
| ユーザー |
commy
|
| 提出日時 | 2019-03-30 19:33:09 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 4,379 bytes |
| コンパイル時間 | 1,057 ms |
| コンパイル使用メモリ | 80,896 KB |
| 実行使用メモリ | 73,856 KB |
| 最終ジャッジ日時 | 2024-11-16 18:37:28 |
| 合計ジャッジ時間 | 31,984 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 16 TLE * 10 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#define REP(i, a, b) for (int i = int(a); i < int(b); i++)
#ifdef _DEBUG_
#define dump(val) cerr << __LINE__ << ":\t" << #val << " = " << (val) << endl
#else
#define dump(val)
#endif
using namespace std;
typedef long long int ll;
template<typename T>
vector<T> make_v(size_t a, T b) {
return vector<T>(a, b);
}
template<typename... Ts>
auto make_v(size_t a, Ts... ts) {
return vector<decltype(make_v(ts...))>(a, make_v(ts...));
}
template<ll MOD = 1000000007>
class ModInt {
ll n;
static ModInt pow(ModInt x, ll p) {
if (p == 0) {
return 1;
} else if (p % 2) {
return x * pow(x, p - 1);
} else {
auto t = ModInt::pow(x, p / 2);
return t * t;
}
}
ModInt reverse() {
return ModInt::pow(*this, MOD - 2);
}
public:
ModInt()
: n(0) {}
ModInt(ll _n)
: n(_n % MOD) {}
ModInt operator+=(const ModInt &m) {
n += m.n;
if (n >= MOD) {
n -= MOD;
}
return *this;
}
ModInt operator-=(const ModInt &m) {
n -= m.n;
if (n < 0) {
n += MOD;
}
return *this;
}
ModInt operator*=(const ModInt &m) {
n *= m.n;
if (n >= MOD) {
n %= MOD;
}
return *this;
}
ModInt operator/=(const ModInt &m) {
return n *= reverse(m);
}
ModInt operator+=(const ll l) {
return (*this) += ModInt(l);
}
ModInt operator-=(const ll l) {
return (*this) -= ModInt(l);
}
ModInt operator*=(const ll l) {
return (*this) *= ModInt(l);
}
ModInt operator/=(const ll l) {
return (*this) /= ModInt(l);
}
ModInt operator+(const ModInt &m) {
auto t = *this;
return t += m;
}
ModInt operator-(const ModInt &m) {
auto t = *this;
return t -= m;
}
ModInt operator*(const ModInt &m) {
auto t = *this;
return t *= m;
}
ModInt operator/(const ModInt &m) {
auto t = *this;
return t /= m;
}
ModInt operator+(const ll l) {
auto t = *this;
return t += l;
}
ModInt operator-(const ll l) {
auto t = *this;
return t -= l;
}
ModInt operator*(const ll l) {
auto t = *this;
return t *= l;
}
ModInt operator/(const ll l) {
auto t = *this;
return t /= l;
}
ModInt operator=(const ll l) {
n = l % MOD;
if (n < 0) {
n += MOD;
}
return *this;
}
friend ostream &operator<<(ostream &out, const ModInt &m) {
out << m.n;
return out;
}
friend istream &operator>>(istream &in, ModInt &m) {
ll l;
in >> l;
m = l;
return in;
}
};
using MOD = ModInt<>;
class SegmentTree {
vector<MOD> data;
int N;
public:
SegmentTree(int n) {
N = 1;
while (N < n) N *= 2;
data.resize(2 * N - 1, MOD(0));
}
void add(int l, int r, MOD val) {
add(l, r, 0, N, 0, val);
}
void add(int l, int r, int a, int b, int x, MOD val) {
if (b <= l || r <= a) return;
if (l <= a && b <= r) {
data[x] += val;
return;
}
int mid = (a + b) / 2;
add(l, r, a, mid, 2 * x + 1, val);
add(l, r, mid, b, 2 * x + 2, val);
}
MOD get(int pos) {
pos += N - 1;
MOD ans = data[pos];
while (pos > 0) {
pos = (pos - 1) / 2;
ans += data[pos];
}
return ans;
}
};
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
int n, m, k;
cin >> n >> m >> k;
vector<int> L(m), R(m);
REP(i, 0, m) {
cin >> L[i] >> R[i];
}
auto dp = make_v(k + 1, n, MOD(0));
dp[0][0] = 1;
REP (i, 0, k) {
SegmentTree segtree(n);
vector<MOD> sum(n + 1, MOD(0));
REP (j, 0, n) {
sum[j + 1] += sum[j] + dp[i][j];
}
REP (j, 0, m) {
MOD a = sum[R[j]] - sum[L[j] - 1];
segtree.add(L[j] - 1, R[j], a);
}
REP (j, 0, n) {
dp[i + 1][j] = segtree.get(j);
}
}
cout << dp[k][n - 1] << endl;
return 0;
}
commy