oj.uz

Submission #645028

# Submission time Handle Problem Language Result Execution time Memory
645028 2022-09-26T04:02:04 Z ghostwriter Boat (APIO16_boat) C++14
9 / 100
 1098 ms 8300 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 && z < seg[j].nd - seg[j].st + 1) 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

# Verdict Execution time Memory Grader output
1 Correct 615 ms 5308 KB Output is correct
2 Correct 597 ms 5292 KB Output is correct
3 Correct 670 ms 5288 KB Output is correct
4 Correct 650 ms 5292 KB Output is correct
5 Correct 688 ms 5288 KB Output is correct
6 Correct 617 ms 5288 KB Output is correct
7 Correct 660 ms 5284 KB Output is correct
8 Correct 620 ms 5284 KB Output is correct
9 Correct 636 ms 5292 KB Output is correct
10 Correct 749 ms 5304 KB Output is correct
11 Correct 674 ms 5288 KB Output is correct
12 Correct 666 ms 5304 KB Output is correct
13 Correct 652 ms 5292 KB Output is correct
14 Correct 661 ms 5288 KB Output is correct
15 Correct 622 ms 5284 KB Output is correct
16 Correct 118 ms 1216 KB Output is correct
17 Correct 120 ms 1284 KB Output is correct
18 Correct 123 ms 1244 KB Output is correct
19 Correct 119 ms 1236 KB Output is correct
20 Correct 126 ms 1276 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 615 ms 5308 KB Output is correct
2 Correct 597 ms 5292 KB Output is correct
3 Correct 670 ms 5288 KB Output is correct
4 Correct 650 ms 5292 KB Output is correct
5 Correct 688 ms 5288 KB Output is correct
6 Correct 617 ms 5288 KB Output is correct
7 Correct 660 ms 5284 KB Output is correct
8 Correct 620 ms 5284 KB Output is correct
9 Correct 636 ms 5292 KB Output is correct
10 Correct 749 ms 5304 KB Output is correct
11 Correct 674 ms 5288 KB Output is correct
12 Correct 666 ms 5304 KB Output is correct
13 Correct 652 ms 5292 KB Output is correct
14 Correct 661 ms 5288 KB Output is correct
15 Correct 622 ms 5284 KB Output is correct
16 Correct 118 ms 1216 KB Output is correct
17 Correct 120 ms 1284 KB Output is correct
18 Correct 123 ms 1244 KB Output is correct
19 Correct 119 ms 1236 KB Output is correct
20 Correct 126 ms 1276 KB Output is correct
21 Incorrect 1098 ms 8300 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 17 ms 2136 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 615 ms 5308 KB Output is correct
2 Correct 597 ms 5292 KB Output is correct
3 Correct 670 ms 5288 KB Output is correct
4 Correct 650 ms 5292 KB Output is correct
5 Correct 688 ms 5288 KB Output is correct
6 Correct 617 ms 5288 KB Output is correct
7 Correct 660 ms 5284 KB Output is correct
8 Correct 620 ms 5284 KB Output is correct
9 Correct 636 ms 5292 KB Output is correct
10 Correct 749 ms 5304 KB Output is correct
11 Correct 674 ms 5288 KB Output is correct
12 Correct 666 ms 5304 KB Output is correct
13 Correct 652 ms 5292 KB Output is correct
14 Correct 661 ms 5288 KB Output is correct
15 Correct 622 ms 5284 KB Output is correct
16 Correct 118 ms 1216 KB Output is correct
17 Correct 120 ms 1284 KB Output is correct
18 Correct 123 ms 1244 KB Output is correct
19 Correct 119 ms 1236 KB Output is correct
20 Correct 126 ms 1276 KB Output is correct
21 Incorrect 1098 ms 8300 KB Output isn't correct
22 Halted 0 ms 0 KB -