oj.uz

Submission #574138

# Submission time Handle Problem Language Result Execution time Memory
574138 2022-06-08T02:54:35 Z eecs Boarding Passes (BOI22_passes) C++17
25 / 100
 2000 ms 724 KB 
#include <bits/stdc++.h>
using namespace std;

const int n = 15;
string str;
long long f[1 << n];

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    cin >> str;
    int mask = 0;
    for (char c : str) mask |= 1 << (c - 'A');
    fill(f + 1, f + (1 << n), 1e18);
    for (int S = 0; S < 1 << n; S++) {
        if ((S & mask) ^ S) continue;
        for (int i = 0; i < n; i++) if (!(S >> i & 1)) {
            auto calc = [&](int p) {
                int c0 = 0, c1 = 0;
                long long s = 0;
                for (int j = p; ~j; j--) {
                    if (str[j] - 'A' == i) c0++;
                    else if (S >> (str[j] - 'A') & 1) s += c0;
                }
                for (int j = p + 1; j < str.size(); j++) {
                    if (str[j] - 'A' == i) c1++;
                    else if (S >> (str[j] - 'A') & 1) s += c1;
                }
                return 2 * s + 1LL * c0 * (c0 - 1) / 2 + 1LL * c1 * (c1 - 1) / 2;
            };
            for (int p = -1; p < (int)str.size(); p++) {
                f[S | (1 << i)] = min(f[S | (1 << i)], f[S] + calc(p));
            }
        }
    }
    cout << f[mask] / 2 << (f[mask] % 2 ? ".5" : "") << "\n";
    return 0;
}

Compilation message

passes.cpp: In lambda function:
passes.cpp:24:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |                 for (int j = p + 1; j < str.size(); j++) {
      |                                     ~~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 40 ms 536 KB Output is correct
6 Execution timed out 2091 ms 724 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 20 ms 468 KB Output is correct
4 Correct 21 ms 556 KB Output is correct
5 Correct 21 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 15 ms 580 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 3 ms 468 KB Output is correct
17 Correct 3 ms 468 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 20 ms 468 KB Output is correct
4 Correct 21 ms 556 KB Output is correct
5 Correct 21 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 15 ms 580 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 3 ms 468 KB Output is correct
16 Correct 3 ms 468 KB Output is correct
17 Correct 3 ms 468 KB Output is correct
18 Correct 1 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 21 ms 468 KB Output is correct
21 Correct 20 ms 468 KB Output is correct
22 Correct 24 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 18 ms 468 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 2 ms 572 KB Output is correct
27 Correct 2 ms 468 KB Output is correct
28 Correct 3 ms 468 KB Output is correct
29 Correct 2 ms 468 KB Output is correct
30 Correct 2 ms 468 KB Output is correct
31 Correct 3 ms 468 KB Output is correct
32 Correct 2 ms 468 KB Output is correct
33 Correct 2 ms 468 KB Output is correct
34 Correct 2 ms 468 KB Output is correct
35 Execution timed out 2079 ms 468 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 40 ms 536 KB Output is correct
6 Execution timed out 2091 ms 724 KB Time limit exceeded
7 Halted 0 ms 0 KB -