oj.uz

Submission #967948

# Submission time Handle Problem Language Result Execution time Memory
967948 2024-04-23T05:57:49 Z duckindog Boat (APIO16_boat) C++17
31 / 100
 1525 ms 524288 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 500 + 10,
          M = 1'000'000'007;
int n;
int a[N], b[N];

template <int MOD=998'244'353>
struct Modular {
  int value;
  static const int MOD_value = MOD;

  Modular(long long v = 0) { value = v % MOD; if (value < 0) value += MOD;}
  Modular(long long a, long long b) : value(0){ *this += a; *this /= b;}

  Modular& operator+=(Modular const& b) {value += b.value; if (value >= MOD) value -= MOD; return *this;}
  Modular& operator-=(Modular const& b) {value -= b.value; if (value < 0) value += MOD;return *this;}
  Modular& operator*=(Modular const& b) {value = (long long)value * b.value % MOD;return *this;}

  friend Modular mexp(Modular a, long long e) {
    Modular res = 1; while (e) { if (e&1) res *= a; a *= a; e >>= 1; }
    return res;
  }
  friend Modular inverse(Modular a) { return mexp(a, MOD - 2); }

  Modular& operator/=(Modular const& b) { return *this *= inverse(b); }
  friend Modular operator+(Modular a, Modular const b) { return a += b; }
  friend Modular operator-(Modular a, Modular const b) { return a -= b; }
  friend Modular operator-(Modular const a) { return 0 - a; }
  friend Modular operator*(Modular a, Modular const b) { return a *= b; }
  friend Modular operator/(Modular a, Modular const b) { return a /= b; }
  friend std::ostream& operator<<(std::ostream& os, Modular const& a) {return os << a.value;}
  friend bool operator==(Modular const& a, Modular const& b) {return a.value == b.value;}
  friend bool operator!=(Modular const& a, Modular const& b) {return a.value != b.value;}
};

using modint = Modular<M>;
modint f[2][1'000'010];
 
int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);
 
  cin >> n;
  for (int i = 1; i <= n; ++i) cin >> a[i] >> b[i];
 
  vector<int> rrh;
  for (int i = 1; i <= n; ++i) { 
    for (int j = a[i]; j <= b[i]; ++j) rrh.push_back(j);
  }
  sort(rrh.begin(), rrh.end());
  rrh.resize(unique(rrh.begin(), rrh.end()) - rrh.begin());

  f[0][0] = 1;
  for (int j = 1; j <= rrh.size(); ++j) f[0][j] = 1;
 
  for (int i = 1; i <= n; ++i) { 
    bool id = i & 1, p = id ^ 1;
    
    int it = lower_bound(rrh.begin(), rrh.end(), a[i]) - rrh.begin() + 1;
    
    f[id][0] = f[p][0];
    for (int j = 1; j <= rrh.size(); ++j) {
      if (j < it || j > b[i] - a[i] + it) {
        f[id][j] = f[id][j - 1] - f[p][j - 1] + f[p][j];
      } else {
        f[id][j] = f[id][j - 1] - f[p][j - 1] + f[p][j] + f[p][j - 1];
      }
    }
  }
  
  cout << f[n & 1][rrh.size()] - 1 << "\n";
  cerr << 1.0 * clock() / CLOCKS_PER_SEC << "\n";
}

Compilation message

boat.cpp: In function 'int32_t main()':
boat.cpp:58:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |   for (int j = 1; j <= rrh.size(); ++j) f[0][j] = 1;
      |                   ~~^~~~~~~~~~~~~
boat.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for (int j = 1; j <= rrh.size(); ++j) {
      |                     ~~^~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8280 KB Output is correct
2 Correct 6 ms 8280 KB Output is correct
3 Correct 6 ms 8280 KB Output is correct
4 Correct 6 ms 8284 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 6 ms 8284 KB Output is correct
7 Correct 6 ms 8288 KB Output is correct
8 Correct 6 ms 8280 KB Output is correct
9 Correct 6 ms 8284 KB Output is correct
10 Correct 6 ms 8284 KB Output is correct
11 Correct 6 ms 8280 KB Output is correct
12 Correct 6 ms 8284 KB Output is correct
13 Correct 6 ms 8284 KB Output is correct
14 Correct 6 ms 8284 KB Output is correct
15 Correct 6 ms 8288 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8284 KB Output is correct
18 Correct 5 ms 8280 KB Output is correct
19 Correct 5 ms 8260 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8280 KB Output is correct
2 Correct 6 ms 8280 KB Output is correct
3 Correct 6 ms 8280 KB Output is correct
4 Correct 6 ms 8284 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 6 ms 8284 KB Output is correct
7 Correct 6 ms 8288 KB Output is correct
8 Correct 6 ms 8280 KB Output is correct
9 Correct 6 ms 8284 KB Output is correct
10 Correct 6 ms 8284 KB Output is correct
11 Correct 6 ms 8280 KB Output is correct
12 Correct 6 ms 8284 KB Output is correct
13 Correct 6 ms 8284 KB Output is correct
14 Correct 6 ms 8284 KB Output is correct
15 Correct 6 ms 8288 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8284 KB Output is correct
18 Correct 5 ms 8280 KB Output is correct
19 Correct 5 ms 8260 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct
21 Correct 48 ms 13268 KB Output is correct
22 Correct 43 ms 14036 KB Output is correct
23 Correct 40 ms 12752 KB Output is correct
24 Correct 43 ms 13268 KB Output is correct
25 Correct 43 ms 12756 KB Output is correct
26 Correct 43 ms 12500 KB Output is correct
27 Correct 44 ms 12500 KB Output is correct
28 Correct 43 ms 13264 KB Output is correct
29 Correct 44 ms 13520 KB Output is correct
30 Correct 1525 ms 13012 KB Output is correct
31 Correct 1506 ms 12496 KB Output is correct
32 Correct 1522 ms 12496 KB Output is correct
33 Correct 1479 ms 13268 KB Output is correct
34 Correct 1492 ms 14292 KB Output is correct
35 Correct 1439 ms 12820 KB Output is correct
36 Correct 1490 ms 12496 KB Output is correct
37 Correct 1503 ms 14292 KB Output is correct
38 Correct 1461 ms 12752 KB Output is correct

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 489 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8280 KB Output is correct
2 Correct 6 ms 8280 KB Output is correct
3 Correct 6 ms 8280 KB Output is correct
4 Correct 6 ms 8284 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 6 ms 8284 KB Output is correct
7 Correct 6 ms 8288 KB Output is correct
8 Correct 6 ms 8280 KB Output is correct
9 Correct 6 ms 8284 KB Output is correct
10 Correct 6 ms 8284 KB Output is correct
11 Correct 6 ms 8280 KB Output is correct
12 Correct 6 ms 8284 KB Output is correct
13 Correct 6 ms 8284 KB Output is correct
14 Correct 6 ms 8284 KB Output is correct
15 Correct 6 ms 8288 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8284 KB Output is correct
18 Correct 5 ms 8280 KB Output is correct
19 Correct 5 ms 8260 KB Output is correct
20 Correct 5 ms 8280 KB Output is correct
21 Correct 48 ms 13268 KB Output is correct
22 Correct 43 ms 14036 KB Output is correct
23 Correct 40 ms 12752 KB Output is correct
24 Correct 43 ms 13268 KB Output is correct
25 Correct 43 ms 12756 KB Output is correct
26 Correct 43 ms 12500 KB Output is correct
27 Correct 44 ms 12500 KB Output is correct
28 Correct 43 ms 13264 KB Output is correct
29 Correct 44 ms 13520 KB Output is correct
30 Correct 1525 ms 13012 KB Output is correct
31 Correct 1506 ms 12496 KB Output is correct
32 Correct 1522 ms 12496 KB Output is correct
33 Correct 1479 ms 13268 KB Output is correct
34 Correct 1492 ms 14292 KB Output is correct
35 Correct 1439 ms 12820 KB Output is correct
36 Correct 1490 ms 12496 KB Output is correct
37 Correct 1503 ms 14292 KB Output is correct
38 Correct 1461 ms 12752 KB Output is correct
39 Runtime error 489 ms 524288 KB Execution killed with signal 9
40 Halted 0 ms 0 KB -