oj.uz

답안 #645035

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
645035 2022-09-26T04:11:02 Z ghostwriter Boat (APIO16_boat) C++14
9 / 100
 1296 ms 8308 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define FSN(i, n) for (int (i) = (n) - 1; (i) >= 0; --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    DIT ME CHUYEN BAO LOC
----------------------------------------------------------------
*/
const int M = 1e9 + 7;
const int N = 505;
const int Nx2 = 1005;
int n, m, d[Nx2][N][2], d1[Nx2][N][2], d2[Nx2][N];
pi a[N], a1[N];
vpi seg;
int fpow(int a, int b, int M) {
    if (b == 0) return 1;
    int tmp = fpow(a, b >> 1, M);
    if (b & 1) return 1LL * tmp * tmp % M * a % M;
    return 1LL * tmp * tmp % M;
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n;
    FOR(i, 1, n) {
        cin >> a[i].st >> a[i].nd;
        a1[i] = a[i];
    }
    sort(a1 + 1, a1 + 1 + n);
    FOR(i, 1, n) {
        if (seg.empty()) {
            seg.pb(a1[i]);
            continue;
        }
        if (a1[i].st > seg.bk().nd) {
            seg.pb(a1[i]);
            continue;
        }
        vpi seg1;
        EACH(j, seg) {
            int l = j.st, r = j.nd;
            if (l < a1[i].st && r >= a1[i].st) {
                seg1.pb({l, a1[i].st - 1});
                seg1.pb({a1[i].st, r});
            }
            else if (l <= a1[i].nd && r > a1[i].nd) {
                seg1.pb({l, a1[i].nd});
                seg1.pb({a1[i].nd + 1, r});
            }
            else seg1.pb({l, r});
        }
        if (a1[i].nd > seg1.bk().nd) seg1.pb({seg1.bk().nd + 1, a1[i].nd});
        swap(seg, seg1);
    }
    reverse(all(seg));
    seg.pb({-1, -1});
    reverse(all(seg));
    m = sz(seg) - 1;
    FOR(i, 1, m) {
        d2[i][0] = 1;
        int cnt = min(n, seg[i].nd - seg[i].st + 1);
        FOR(j, 1, cnt) d2[i][j] = 1LL * d2[i][j - 1] * (seg[i].nd - seg[i].st + 2 - j) % M * fpow(j, M - 2, M) % M;
    }
    FOR(i, 1, m)
    FOR(j, 0, n)
    FOR(z, 0, 1)
        d1[i][j][z] = d2[i][j];
    FOR(i, 1, n) {
        FOR(j, 1, m)
        FOR(z, 0, n - i)
        FOR(stat, 0, 1) {
            int &rs = d[j][z][stat];
            rs = 0;
            if (stat) rs = (rs + d1[j][z][1]) % M;
            if (a[i].st <= seg[j].st && seg[j].nd <= a[i].nd) rs = (rs + d1[j][z + 1][1]) % M;
            if (j > 1) rs = (rs + 1LL * d2[j][z] * d[j - 1][0][0] % M) % M;
        }
        FOR(j, 1, m)
        FOR(z, 0, n - i)
        FOR(stat, 0, 1)
            d1[j][z][stat] = d[j][z][stat];
    }
    cout << (d[m][0][1] - 1 + M) % M;
    return 0;
}
/*
2
1 2
2 3
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:66:5: note: in expansion of macro 'FOR'
   66 |     FOR(i, 1, n) {
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:71:5: note: in expansion of macro 'FOR'
   71 |     FOR(i, 1, n) {
      |     ^~~
boat.cpp:34:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   34 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
boat.cpp:81:9: note: in expansion of macro 'EACH'
   81 |         EACH(j, seg) {
      |         ^~~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:100:5: note: in expansion of macro 'FOR'
  100 |     FOR(i, 1, m) {
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:103:9: note: in expansion of macro 'FOR'
  103 |         FOR(j, 1, cnt) d2[i][j] = 1LL * d2[i][j - 1] * (seg[i].nd - seg[i].st + 2 - j) % M * fpow(j, M - 2, M) % M;
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:105:5: note: in expansion of macro 'FOR'
  105 |     FOR(i, 1, m)
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:106:5: note: in expansion of macro 'FOR'
  106 |     FOR(j, 0, n)
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:107:5: note: in expansion of macro 'FOR'
  107 |     FOR(z, 0, 1)
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:109:5: note: in expansion of macro 'FOR'
  109 |     FOR(i, 1, n) {
      |     ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:110:9: note: in expansion of macro 'FOR'
  110 |         FOR(j, 1, m)
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:111:9: note: in expansion of macro 'FOR'
  111 |         FOR(z, 0, n - i)
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'stat' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:112:9: note: in expansion of macro 'FOR'
  112 |         FOR(stat, 0, 1) {
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:119:9: note: in expansion of macro 'FOR'
  119 |         FOR(j, 1, m)
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:120:9: note: in expansion of macro 'FOR'
  120 |         FOR(z, 0, n - i)
      |         ^~~
boat.cpp:30:31: warning: unnecessary parentheses in declaration of 'stat' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
boat.cpp:121:9: note: in expansion of macro 'FOR'
  121 |         FOR(stat, 0, 1)
      |         ^~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 617 ms 5284 KB Output is correct
2 Correct 614 ms 5288 KB Output is correct
3 Correct 653 ms 5292 KB Output is correct
4 Correct 628 ms 5284 KB Output is correct
5 Correct 621 ms 5288 KB Output is correct
6 Correct 656 ms 5332 KB Output is correct
7 Correct 639 ms 5288 KB Output is correct
8 Correct 682 ms 5284 KB Output is correct
9 Correct 626 ms 5284 KB Output is correct
10 Correct 617 ms 5288 KB Output is correct
11 Correct 671 ms 5324 KB Output is correct
12 Correct 642 ms 5300 KB Output is correct
13 Correct 610 ms 5288 KB Output is correct
14 Correct 635 ms 5288 KB Output is correct
15 Correct 655 ms 5288 KB Output is correct
16 Correct 113 ms 1108 KB Output is correct
17 Correct 133 ms 1288 KB Output is correct
18 Correct 121 ms 1248 KB Output is correct
19 Correct 135 ms 1288 KB Output is correct
20 Correct 118 ms 1260 KB Output is correct

Subtask #2
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 617 ms 5284 KB Output is correct
2 Correct 614 ms 5288 KB Output is correct
3 Correct 653 ms 5292 KB Output is correct
4 Correct 628 ms 5284 KB Output is correct
5 Correct 621 ms 5288 KB Output is correct
6 Correct 656 ms 5332 KB Output is correct
7 Correct 639 ms 5288 KB Output is correct
8 Correct 682 ms 5284 KB Output is correct
9 Correct 626 ms 5284 KB Output is correct
10 Correct 617 ms 5288 KB Output is correct
11 Correct 671 ms 5324 KB Output is correct
12 Correct 642 ms 5300 KB Output is correct
13 Correct 610 ms 5288 KB Output is correct
14 Correct 635 ms 5288 KB Output is correct
15 Correct 655 ms 5288 KB Output is correct
16 Correct 113 ms 1108 KB Output is correct
17 Correct 133 ms 1288 KB Output is correct
18 Correct 121 ms 1248 KB Output is correct
19 Correct 135 ms 1288 KB Output is correct
20 Correct 118 ms 1260 KB Output is correct
21 Incorrect 1296 ms 8308 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 24 ms 2132 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 617 ms 5284 KB Output is correct
2 Correct 614 ms 5288 KB Output is correct
3 Correct 653 ms 5292 KB Output is correct
4 Correct 628 ms 5284 KB Output is correct
5 Correct 621 ms 5288 KB Output is correct
6 Correct 656 ms 5332 KB Output is correct
7 Correct 639 ms 5288 KB Output is correct
8 Correct 682 ms 5284 KB Output is correct
9 Correct 626 ms 5284 KB Output is correct
10 Correct 617 ms 5288 KB Output is correct
11 Correct 671 ms 5324 KB Output is correct
12 Correct 642 ms 5300 KB Output is correct
13 Correct 610 ms 5288 KB Output is correct
14 Correct 635 ms 5288 KB Output is correct
15 Correct 655 ms 5288 KB Output is correct
16 Correct 113 ms 1108 KB Output is correct
17 Correct 133 ms 1288 KB Output is correct
18 Correct 121 ms 1248 KB Output is correct
19 Correct 135 ms 1288 KB Output is correct
20 Correct 118 ms 1260 KB Output is correct
21 Incorrect 1296 ms 8308 KB Output isn't correct
22 Halted 0 ms 0 KB -