제출 #833267

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
833267		maomao90	Monster Game (JOI21_monster)	C++17	93 / 100	107 ms	4268 KiB

monster

// 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> 
#include "monster.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 unsigned long long ull;
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 = 1005;


namespace {
    int n;
    vi p, op;
    int tmp[MAXN];
    bool res[MAXN];
    int memo[MAXN][MAXN];
    bool query(int a, int b) {
        if (memo[a][b] == -1) {
            memo[a][b] = Query(a, b);
            memo[b][a] = memo[a][b] ^ 1;
        }
        return memo[a][b];
    }
    void dnc(int l, int r) {
        if (l == r) {
            return;
        }
        int m = l + r >> 1;
        dnc(l, m); dnc(m + 1, r);
        int pl = l, pr = m + 1;
        int ptr = l;
        while (pl <= m || pr <= r) {
            if (pr > r || (pl <= m && !query(p[pl], p[pr]))) {
                tmp[ptr++] = p[pl++];
            } else {
                tmp[ptr++] = p[pr++];
            }
        }
        REP (i, l, r + 1) {
            p[i] = tmp[i];
        }
    }
}

vi Solve(int N) {
    memset(memo, -1, sizeof memo);
    n = N;
    p = vi(n);
    iota(ALL(p), 0);
    dnc(0, n - 1);
    vi bad;
    REP (i, 1, n) {
        res[i] = query(p[0], p[i]);
        if (res[i]) {
            bad.pb(i);
        }
    }
    bool s0 = res[1];
    if (SZ(bad) == 1 && res[1] == 0) {
        if (bad[0] > 2) {
            if (!query(p[1], p[bad[0]])) {
                swap(p[0], p[1]);
            }
        } else {
            int cnt = 0;
            REP (i, 1, n) {
                if (i == bad[0]) {
                    continue;
                }
                cnt += query(p[bad[0]], p[i]);
            }
            if (cnt == 2) {
                swap(p[0], p[1]);
            }
        }
        s0 = 1;
    }
    if (!s0) {
        assert(res[1] == 0);
        int prv = 1;
        vi v;
        REP (i, 2, n) {
            if (res[i] != res[i - 1]) {
                v.pb(prv);
                prv = i;
            }
        }
        v.pb(prv);
        assert(SZ(v) >= 2);
        if (SZ(v) >= 4) {
            reverse(p.begin(), p.begin() + v[2]);
        } else if ((SZ(v) == 2 ? n : v[2]) - v[1] == 1) {
            swap(p[0], p[1]);
        } else {
            reverse(p.begin(), p.begin() + v[2] - 1);
        }
    }
    REP (i, 0, n - 1) {
        if (query(p[i], p[i + 1])) {
            continue;
        }
        int id = -1;
        REP (j, i + 1, n) {
            if (query(p[i], p[j])) {
                id = j;
                break;
            }
        }
        assert(id != -1);
        reverse(p.begin() + i + 1, p.begin() + id + 1);
        i = id - 1;
    }
    vi t(n);
    REP (i, 0, n) {
        t[p[i]] = i;
    }
    return t;
}

컴파일 시 표준 에러 (stderr) 메시지

monster.cpp: In function 'void {anonymous}::dnc(int, int)':
monster.cpp:59:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   59 |         int m = l + r >> 1;
      |                 ~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 68 / 75