結果
| 問題 | No.616 へんなソート |
| ユーザー |
 はむこ
|
| 提出日時 | 2017-12-04 13:04:36 |
| 言語 | C++11 (gcc 11.4.0) |
| 結果 |
AC
|
| 実行時間 | 94 ms / 2,000 ms |
| コード長 | 6,602 bytes |
| コンパイル時間 | 1,321 ms |
| コンパイル使用メモリ | 161,672 KB |
| 実行使用メモリ | 4,380 KB |
| 最終ジャッジ日時 | 2023-08-19 02:22:48 |
| 合計ジャッジ時間 | 2,607 ms |
|
ジャッジサーバーID （参考情報） |
judge13 / judge14 |
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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 | 1 ms
4,376 KB |
| testcase_01 | AC | 1 ms
4,380 KB |
| testcase_02 | AC | 1 ms
4,376 KB |
| testcase_03 | AC | 1 ms
4,376 KB |
| testcase_04 | AC | 1 ms
4,376 KB |
| testcase_05 | AC | 1 ms
4,376 KB |
| testcase_06 | AC | 1 ms
4,376 KB |
| testcase_07 | AC | 1 ms
4,380 KB |
| testcase_08 | AC | 1 ms
4,376 KB |
| testcase_09 | AC | 2 ms
4,376 KB |
| testcase_10 | AC | 1 ms
4,380 KB |
| testcase_11 | AC | 1 ms
4,376 KB |
| testcase_12 | AC | 3 ms
4,376 KB |
| testcase_13 | AC | 49 ms
4,376 KB |
| testcase_14 | AC | 2 ms
4,376 KB |
| testcase_15 | AC | 2 ms
4,376 KB |
| testcase_16 | AC | 2 ms
4,380 KB |
| testcase_17 | AC | 42 ms
4,380 KB |
| testcase_18 | AC | 19 ms
4,380 KB |
| testcase_19 | AC | 14 ms
4,380 KB |
| testcase_20 | AC | 1 ms
4,380 KB |
| testcase_21 | AC | 2 ms
4,380 KB |
| testcase_22 | AC | 7 ms
4,376 KB |
| testcase_23 | AC | 1 ms
4,376 KB |
| testcase_24 | AC | 1 ms
4,376 KB |
| testcase_25 | AC | 1 ms
4,376 KB |
| testcase_26 | AC | 6 ms
4,376 KB |
| testcase_27 | AC | 5 ms
4,380 KB |
| testcase_28 | AC | 94 ms
4,380 KB |
| testcase_29 | AC | 92 ms
4,380 KB |
ソースコード
#include <bits/stdc++.h>
#include <sys/time.h>
using namespace std;
#define rep(i,n) for(long long i = 0; i < (long long)(n); i++)
#define repi(i,a,b) for(long long i = (long long)(a); i < (long long)(b); i++)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second
#define mt make_tuple
#define mp make_pair
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
using ll = long long; using vll = vector<ll>; using vvll = vector<vll>; using P = pair<ll, ll>;
using ld = long double; using vld = vector<ld>;
using vi = vector<int>; using vvi = vector<vi>; vll conv(vi& v) { vll r(v.size()); rep(i, v.size()) r[i] = v[i]; return r; }
inline void input(int &v){ v=0;char c=0;int p=1; while(c<'0' || c>'9'){if(c=='-')p=-1;c=getchar();} while(c>='0' && c<='9'){v=(v<<3)+(v<<1)+c-'0';c=getchar();} v*=p; }
template <typename T, typename U> ostream &operator<<(ostream &o, const pair<T, U> &v) { o << "(" << v.first << ", " << v.second << ")"; return o; }
template<size_t...> struct seq{}; template<size_t N, size_t... Is> struct gen_seq : gen_seq<N-1, N-1, Is...>{}; template<size_t... Is> struct gen_seq<0, Is...> : seq<Is...>{};
template<class Ch, class Tr, class Tuple, size_t... Is>
void print_tuple(basic_ostream<Ch,Tr>& os, Tuple const& t, seq<Is...>){ using s = int[]; (void)s{0, (void(os << (Is == 0? "" : ", ") << get<Is>(t)), 0)...}; }
template<class Ch, class Tr, class... Args>
auto operator<<(basic_ostream<Ch, Tr>& os, tuple<Args...> const& t) -> basic_ostream<Ch, Tr>& { os << "("; print_tuple(os, t, gen_seq<sizeof...(Args)>()); return os << ")"; }
ostream &operator<<(ostream &o, const vvll &v) { rep(i, v.size()) { rep(j, v[i].size()) o << v[i][j] << " "; o << endl; } return o; }
template <typename T> ostream &operator<<(ostream &o, const vector<T> &v) { o << '['; rep(i, v.size()) o << v[i] << (i != v.size()-1 ? ", " : ""); o << "]"; return o; }
template <typename T> ostream &operator<<(ostream &o, const deque<T> &v) { o << '['; rep(i, v.size()) o << v[i] << (i != v.size()-1 ? ", " : ""); o << "]"; return o; }
template <typename T> ostream &operator<<(ostream &o, const set<T> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]"; return o; }
template <typename T> ostream &operator<<(ostream &o, const unordered_set<T> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]"; return o; }
template <typename T, typename U> ostream &operator<<(ostream &o, const map<T, U> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it << (next(it) != m.end() ? ", " : ""); o << "]"; return o; }
template <typename T, typename U, typename V> ostream &operator<<(ostream &o, const unordered_map<T, U, V> &m) { o << '['; for (auto it = m.begin(); it != m.end(); it++) o << *it; o << "]"; return o; }
vector<int> range(const int x, const int y) { vector<int> v(y - x + 1); iota(v.begin(), v.end(), x); return v; }
template <typename T> istream& operator>>(istream& i, vector<T>& o) { rep(j, o.size()) i >> o[j]; return i;}
template <typename T, typename S, typename U> ostream &operator<<(ostream &o, const priority_queue<T, S, U> &v) { auto tmp = v; while (tmp.size()) { auto x = tmp.top(); tmp.pop(); o << x << " ";} return o; }
template <typename T> ostream &operator<<(ostream &o, const queue<T> &v) { auto tmp = v; while (tmp.size()) { auto x = tmp.front(); tmp.pop(); o << x << " ";} return o; }
template <typename T> ostream &operator<<(ostream &o, const stack<T> &v) { auto tmp = v; while (tmp.size()) { auto x = tmp.top(); tmp.pop(); o << x << " ";} return o; }
template <typename T> unordered_map<T, ll> counter(vector<T> vec){unordered_map<T, ll> ret; for (auto&& x : vec) ret[x]++; return ret;};
string substr(string s, P x) {return s.substr(x.fi, x.se - x.fi); }
void vizGraph(vvll& g, int mode = 0, string filename = "out.png") { ofstream ofs("./out.dot"); ofs << "digraph graph_name {" << endl; set<P> memo; rep(i, g.size()) rep(j, g[i].size()) { if (mode && (memo.count(P(i, g[i][j])) || memo.count(P(g[i][j], i)))) continue; memo.insert(P(i, g[i][j])); ofs << " " << i << " -> " << g[i][j] << (mode ? " [arrowhead = none]" : "")<< endl; } ofs << "}" << endl; ofs.close(); system(((string)"dot -T png out.dot >" + filename).c_str()); }
size_t random_seed; namespace std { using argument_type = P; template<> struct hash<argument_type> { size_t operator()(argument_type const& x) const { size_t seed = random_seed; seed ^= hash<ll>{}(x.fi); seed ^= (hash<ll>{}(x.se) << 1); return seed; } }; }; // hash for various class
struct timeval start; double sec() { struct timeval tv; gettimeofday(&tv, NULL); return (tv.tv_sec - start.tv_sec) + (tv.tv_usec - start.tv_usec) * 1e-6; }
struct init_{init_(){ ios::sync_with_stdio(false); cin.tie(0); gettimeofday(&start, NULL); struct timeval myTime; struct tm *time_st; gettimeofday(&myTime, NULL); time_st = localtime(&myTime.tv_sec); srand(myTime.tv_usec); random_seed = RAND_MAX / 2 + rand() / 2; }} init__;
uint32_t randxor() { static uint32_t x=1+(uint32_t)random_seed,y=362436069,z=521288629,w=88675123; uint32_t t; t=(x^(x<<11));x=y;y=z;z=w; return( w=(w^(w>>19))^(t^(t>>8)) ); }
#define rand randxor
#define ldout fixed << setprecision(40)
#define EPS (double)1e-14;
#define INF (ll)1e18;
#define mo (ll)(1e9+7)
int main(void) {
ll n, K; cin >> n >> K; assert(1<=n&&n<=300&&0<=K&&K<=n*(n-1)/2);
vll a(n); cin >> a; rep(i, n) assert(1<=a[i]&&a[i]<=1e9);
/*
DP[i][j] = i個見て、転倒数がjであるような場合の数
DP[0][0] = 1
DP[i][j] = sum_{k in [0, i+1)} DP[i-1][j-k]
= sum_{k in [max(0, j-i), j+1)} DP[i-1][k]
a = {1 2 3 4}
as = {1 3 6 10}
a[i:j) =
a[1:2] = as[2]-as[0]
as[j]-as[i-1] = a[i, j]
sum dp[i-1][j-i:j] = dp[i-1][j]-dp[i-1][max(0, j-i)-1]
*/
vvll dp(2, vll(n*(n+1)/2+1));
ll m = dp[0].size();
dp[0][0] = 1;
repi(i, 1, n+1) {
ll prev = (i + 1) % 2, curr = i % 2;
vll dps(m+1);
rep(j, m) {
(dps[j+1] = dps[j] + dp[prev][j]) %= mo;
}
rep(j, m)
dp[curr][j] = 0;
rep(j, m) {
(dp[curr][j] = dps[j+1] - dps[max(0ll, j-i+1)]) %= mo;
}
}
ll ret = 0;
rep(i, K+1) {
(ret += dp[n%2][i]) %= mo;
}
cout << ((ret % mo + mo) % mo) << endl;
return 0;
}