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답안 #589319

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
589319 2022-07-04T12:53:45 Z maomao90 Boarding Passes (BOI22_passes) C++17
100 / 100
 618 ms 183504 KB 
// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 100005;
const int MAXG = 15;

int n, g;
string s;
int psm[MAXG][MAXN];
ll pre[MAXG + 5][MAXG + 5][MAXN];
ll dp[(1 << MAXG) + 5];
vi vec[MAXG + 5];

inline ll calc(int n) {
    return (ll) n * (n - 1) / 2;
}

int main() {
    #ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
    #endif
    cin >> s;
    n = SZ(s);
    REP (i, 0, n) {
        mxto(g, s[i] - 'A' + 1);
    }
    REP (i, 0, g) {
        REP (j, 0, n) {
            if (s[j] - 'A' == i) {
                cerr << i << ' ' << j << '\n';
                vec[i].pb(j);
                psm[i][j] = 1;
            }
            if (j) {
                psm[i][j] += psm[i][j - 1];
            }
        }
    }
    REP (j, 0, g) {
        REP (i, 0, g) {
            int all = 0;
            REP (k, 0, n) {
                if (s[k] - 'A' == i) {
                    all++;
                }
            }
            int acnt = 0, ajc = 0;
            ll cur = 0;
            RREP (k, n - 1, 0) {
                if (s[k] - 'A' == j) {
                    cur += acnt * 2;
                    ajc++;
                } else if (s[k] - 'A' == i) {
                    acnt++;
                }
            }
            int jc = 0, cnt = 0;
            REP (k, 0, n) {
                if (s[k] - 'A' == j) {
                    cur += cnt * 2;
                    cur -= acnt * 2;
                    jc++;
                } else if (s[k] - 'A' == i) {
                    cnt++;
                    acnt--;
                }
                pre[j][i][k] = cur;
            }
        }
    }
    dp[0] = 0;
    REP (i, 1, 1 << g) {
        dp[i] = LINF;
        cerr << bitset<2>(i) << '\n';
        REP (j, 0, g) {
            if (i >> j & 1 ^ 1) {
                continue;
            }
            cerr << ' ' << j << '\n';
            int ni = i ^ (1 << j);
            ll mn = LINF;
            auto solve = [&] (int k) {
                ll tmp = calc(psm[j][k]) + calc(psm[j][n - 1] - psm[j][k]);
                REP (l, 0, g) {
                    if (i >> l & 1 ^ 1) {
                        continue;
                    }
                    tmp += pre[j][l][k];
                }
                return tmp;
            };
            if (SZ(vec[j]) == 0) {
                mnto(dp[i], dp[ni]);
                continue;
            }
            mnto(dp[i], dp[ni] + solve(0));
            int lo = 0, hi = SZ(vec[j]) - 1;
            // REP (i, 0, SZ(vec[j])) {
            //     cerr << "   " << i << ' ' << vec[j][i] << ": " << solve(vec[j][i]) << '\n';
            // }
            while (hi - lo >= 3) {
                int mid1 = lo + (hi - lo + 1) / 3, mid2 = mid1 + hi >> 1;
                assert(mid1 != mid2);
                cerr << "  " << lo << ' ' << hi << ' ' << mid1 << ' ' << mid2 << '\n';
                ll tmp1 = solve(vec[j][mid1]), tmp2 = solve(vec[j][mid2]);
                if (tmp1 <= tmp2) {
                    hi = mid2;
                } else {
                    lo = mid1;
                }
            }
            REP (k, lo, hi + 1) {
                cerr << "    " << k << ' ' << vec[j][k] << ": " << solve(vec[j][k]) << '\n';
                mnto(dp[i], dp[ni] + solve(vec[j][k]));
            }
        }
    }
    ll ans = dp[(1 << g) - 1];
    if (ans % 2 == 0) {
        ans /= 2;
        cout << ans << '\n';
    } else {
        ans /= 2;
        cout << ans << ".5\n";
    }
    return 0;
}

Compilation message

passes.cpp: In function 'int main()':
passes.cpp:108:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
  108 |             if (i >> j & 1 ^ 1) {
      |                 ~~~~~~~^~~
passes.cpp: In lambda function:
passes.cpp:117:32: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
  117 |                     if (i >> l & 1 ^ 1) {
      |                         ~~~~~~~^~~
passes.cpp: In function 'int main()':
passes.cpp:134:64: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  134 |                 int mid1 = lo + (hi - lo + 1) / 3, mid2 = mid1 + hi >> 1;
      |                                                           ~~~~~^~~~
passes.cpp:113:16: warning: unused variable 'mn' [-Wunused-variable]
  113 |             ll mn = LINF;
      |                ^~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 1808 KB Output is correct
7 Correct 2 ms 2064 KB Output is correct
8 Correct 2 ms 2192 KB Output is correct
9 Correct 2 ms 2192 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 0 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 0 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 0 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 0 ms 596 KB Output is correct
33 Correct 1 ms 596 KB Output is correct
34 Correct 1 ms 596 KB Output is correct
35 Correct 5 ms 6100 KB Output is correct
36 Correct 6 ms 6100 KB Output is correct
37 Correct 13 ms 9196 KB Output is correct
38 Correct 12 ms 9172 KB Output is correct
39 Correct 8 ms 9284 KB Output is correct
40 Correct 10 ms 9172 KB Output is correct
41 Correct 9 ms 8968 KB Output is correct
42 Correct 10 ms 9044 KB Output is correct
43 Correct 9 ms 9048 KB Output is correct
44 Correct 9 ms 9044 KB Output is correct
45 Correct 10 ms 9044 KB Output is correct
46 Correct 9 ms 9056 KB Output is correct

Subtask #4
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 1808 KB Output is correct
7 Correct 2 ms 2064 KB Output is correct
8 Correct 2 ms 2192 KB Output is correct
9 Correct 2 ms 2192 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 0 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 1 ms 596 KB Output is correct
24 Correct 1 ms 596 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 1 ms 596 KB Output is correct
34 Correct 1 ms 596 KB Output is correct
35 Correct 1 ms 596 KB Output is correct
36 Correct 0 ms 596 KB Output is correct
37 Correct 1 ms 596 KB Output is correct
38 Correct 1 ms 596 KB Output is correct
39 Correct 1 ms 596 KB Output is correct
40 Correct 1 ms 596 KB Output is correct
41 Correct 0 ms 596 KB Output is correct
42 Correct 1 ms 596 KB Output is correct
43 Correct 1 ms 596 KB Output is correct
44 Correct 5 ms 6100 KB Output is correct
45 Correct 6 ms 6100 KB Output is correct
46 Correct 13 ms 9196 KB Output is correct
47 Correct 12 ms 9172 KB Output is correct
48 Correct 8 ms 9284 KB Output is correct
49 Correct 10 ms 9172 KB Output is correct
50 Correct 9 ms 8968 KB Output is correct
51 Correct 10 ms 9044 KB Output is correct
52 Correct 9 ms 9048 KB Output is correct
53 Correct 9 ms 9044 KB Output is correct
54 Correct 10 ms 9044 KB Output is correct
55 Correct 9 ms 9056 KB Output is correct
56 Correct 19 ms 1884 KB Output is correct
57 Correct 30 ms 1876 KB Output is correct
58 Correct 0 ms 340 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 0 ms 212 KB Output is correct
62 Correct 0 ms 284 KB Output is correct
63 Correct 2 ms 1808 KB Output is correct
64 Correct 2 ms 2064 KB Output is correct
65 Correct 2 ms 2192 KB Output is correct
66 Correct 2 ms 2192 KB Output is correct
67 Correct 0 ms 340 KB Output is correct
68 Correct 1 ms 340 KB Output is correct
69 Correct 1 ms 596 KB Output is correct
70 Correct 1 ms 596 KB Output is correct
71 Correct 1 ms 596 KB Output is correct
72 Correct 1 ms 596 KB Output is correct
73 Correct 1 ms 596 KB Output is correct
74 Correct 1 ms 596 KB Output is correct
75 Correct 1 ms 596 KB Output is correct
76 Correct 1 ms 596 KB Output is correct
77 Correct 1 ms 596 KB Output is correct
78 Correct 0 ms 596 KB Output is correct
79 Correct 1 ms 596 KB Output is correct
80 Correct 1 ms 596 KB Output is correct
81 Correct 0 ms 596 KB Output is correct
82 Correct 0 ms 596 KB Output is correct
83 Correct 0 ms 596 KB Output is correct
84 Correct 4 ms 6100 KB Output is correct
85 Correct 4 ms 6100 KB Output is correct
86 Correct 12 ms 9172 KB Output is correct
87 Correct 9 ms 9144 KB Output is correct
88 Correct 6 ms 9172 KB Output is correct
89 Correct 12 ms 9172 KB Output is correct
90 Correct 10 ms 9044 KB Output is correct
91 Correct 12 ms 9044 KB Output is correct
92 Correct 10 ms 9044 KB Output is correct
93 Correct 10 ms 9044 KB Output is correct
94 Correct 10 ms 8940 KB Output is correct
95 Correct 9 ms 8988 KB Output is correct
96 Correct 618 ms 183276 KB Output is correct
97 Correct 22 ms 1620 KB Output is correct
98 Correct 351 ms 183352 KB Output is correct
99 Correct 173 ms 183408 KB Output is correct
100 Correct 28 ms 2004 KB Output is correct
101 Correct 453 ms 183408 KB Output is correct
102 Correct 545 ms 183504 KB Output is correct
103 Correct 540 ms 183256 KB Output is correct
104 Correct 521 ms 183260 KB Output is correct
105 Correct 552 ms 183384 KB Output is correct
106 Correct 552 ms 183276 KB Output is correct
107 Correct 541 ms 183384 KB Output is correct
108 Correct 285 ms 160036 KB Output is correct
109 Correct 545 ms 183420 KB Output is correct