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Submission #975258

# Submission time Handle Problem Language Result Execution time Memory
975258 2024-05-04T15:59:11 Z duckindog Ice Hockey World Championship (CEOI15_bobek) C++17
100 / 100
 238 ms 22496 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 40 + 10;
int n;
long long m;
long long a[N], b[N];

int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);

  cin >> n >> m;
  vector<long long> first = {0}, second = {0};
  {    
    int x = (n + 1 >> 1), y = n - x;
    for (int i = 1; i <= x; ++i) cin >> a[i];
    for (int i = 1; i <= y; ++i) cin >> b[i];

    for (int bit = 1; bit < (1 << x); ++bit) { 
      long long sum = 0;
      for (int j = 1; j <= x; ++j) sum += (bit >> j - 1 & 1) * a[j];
      if (sum <= m) first.push_back(sum);
    }

    for (int bit = 1; bit < (1 << y); ++bit) { 
      long long sum = 0;
      for (int j = 1; j <= y; ++j) sum += (bit >> j - 1 & 1) * b[j];
      if (sum <= m) second.push_back(sum);
    }
  }
  sort(first.begin(), first.end());
  sort(second.begin(), second.end());

  long long answer = 0;
  for (const auto& x : first) answer += upper_bound(second.begin(), second.end(), m - x) - second.begin();

  cout << answer << "\n";
}

Compilation message

bobek.cpp: In function 'int32_t main()':
bobek.cpp:16:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   16 |     int x = (n + 1 >> 1), y = n - x;
      |              ~~^~~
bobek.cpp:22:53: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   22 |       for (int j = 1; j <= x; ++j) sum += (bit >> j - 1 & 1) * a[j];
      |                                                   ~~^~~
bobek.cpp:28:53: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   28 |       for (int j = 1; j <= y; ++j) sum += (bit >> j - 1 & 1) * b[j];
      |                                                   ~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 504 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 452 KB Output is correct
7 Correct 1 ms 348 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 2520 KB Output is correct
2 Correct 54 ms 5588 KB Output is correct
3 Correct 238 ms 22496 KB Output is correct
4 Correct 54 ms 5588 KB Output is correct
5 Correct 8 ms 1500 KB Output is correct
6 Correct 5 ms 1116 KB Output is correct
7 Correct 2 ms 344 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 3228 KB Output is correct
2 Correct 20 ms 2264 KB Output is correct
3 Correct 82 ms 11768 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 4 ms 1116 KB Output is correct
6 Correct 11 ms 1756 KB Output is correct
7 Correct 2 ms 348 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 4564 KB Output is correct
2 Correct 88 ms 8660 KB Output is correct
3 Correct 83 ms 8656 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 44 ms 8652 KB Output is correct
6 Correct 180 ms 22176 KB Output is correct
7 Correct 11 ms 348 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 16844 KB Output is correct
2 Correct 18 ms 2264 KB Output is correct
3 Correct 6 ms 1116 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 4 ms 1116 KB Output is correct
6 Correct 162 ms 16920 KB Output is correct
7 Correct 2 ms 348 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 2520 KB Output is correct
2 Correct 52 ms 5588 KB Output is correct
3 Correct 7 ms 988 KB Output is correct
4 Correct 6 ms 988 KB Output is correct
5 Correct 48 ms 8656 KB Output is correct
6 Correct 17 ms 2516 KB Output is correct
7 Correct 29 ms 344 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 214 ms 21440 KB Output is correct
2 Correct 20 ms 2520 KB Output is correct
3 Correct 6 ms 1116 KB Output is correct
4 Correct 231 ms 21236 KB Output is correct
5 Correct 60 ms 11472 KB Output is correct
6 Correct 11 ms 1752 KB Output is correct
7 Correct 3 ms 600 KB Output is correct