Submission #833881

#	Time	Username	Problem	Language	Result	Execution time	Memory
833881		maomao90	Chameleon's Love (JOI20_chameleon)	C++17	0 / 100	0 ms	208 KiB

chameleon

// 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 "chameleon.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;
    int occ[MAXN][MAXN];
}

void Solve(int N) {
    n = N;
    //vi lid(n), rid(n);
    //iota(ALL(lid), 1);
    //iota(ALL(rid), n + 1);
    vi lid, rid;
    REP (i, 1, 2 * n + 1) {
        lid.pb(i);
        if (Query(lid) != SZ(lid)) {
            lid.pop_back();
            rid.pb(i);
        }
    }
    REP (z, 0, 2) {
        for (int i : rid) {
            vi p(ALL(lid));
            p.pb(i);
            int s = Query(p) - SZ(p);
            if (s == -1) {
                int lo = 0, hi = n - 1;
                while (lo < hi) {
                    int mid = lo + hi >> 1;
                    vi p(lid.begin(), lid.begin() + mid + 1);
                    p.pb(i);
                    int x = Query(p) - SZ(p);
                    if (x <= s) {
                        hi = mid;
                    } else {
                        lo = mid + 1;
                    }
                }
                cerr << "ANSWER: " << i << ' ' << lid[hi] << '\n';
                Answer(i, lid[hi]);
                continue;
            }
            vii tmp;
            REP (c, s, -1) {
                int lo = 0, hi = n - 1;
                while (lo < hi) {
                    int mid = lo + hi >> 1;
                    vi p(lid.begin(), lid.begin() + mid + 1);
                    p.pb(i);
                    int x = Query(p) - SZ(p);
                    if (x <= c) {
                        hi = mid;
                    } else {
                        lo = mid + 1;
                    }
                }
                cerr << i << ' ' << lid[hi] << '\n';
                tmp.pb({min(i, lid[hi]), max(i, lid[hi])});
                //tmp.pb({i, lid[hi]});
                lo = 0, hi = n - 1;
                while (lo < hi) {
                    int mid = lo + hi + 1 >> 1;
                    vi p(lid.begin() + mid, lid.end());
                    p.pb(i);
                    int x = Query(p) - SZ(p);
                    if (x <= c) {
                        lo = mid;
                    } else {
                        hi = mid - 1;
                    }
                }
                cerr << i << ' ' << lid[lo] << '\n';
                tmp.pb({min(i, lid[lo]), max(i, lid[lo])});
                //tmp.pb({i, lid[lo]});
            }
            sort(ALL(tmp));
            REP (i, 0, SZ(tmp)) {
                if ((i != 0 && tmp[i - 1] == tmp[i]) || (i != SZ(tmp) - 1 && tmp[i + 1] == tmp[i])) {
                    continue;
                }
                occ[tmp[i].FI][tmp[i].SE]++;
            }
        }
        swap(lid, rid);
    }
    REP (i, 1, 2 * n + 1) {
        REP (j, i + 1, 2 * n + 1) {
            if (occ[i][j] == 2) {
                cerr << "ANSWER: " << i << ' ' << j << '\n';
                Answer(i, j);
            }
        }
    }
}

Compilation message (stderr)

chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:67:34: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   67 |                     int mid = lo + hi >> 1;
      |                               ~~~^~~~
chameleon.cpp:85:34: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   85 |                     int mid = lo + hi >> 1;
      |                               ~~~^~~~
chameleon.cpp:100:39: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  100 |                     int mid = lo + hi + 1 >> 1;
      |                               ~~~~~~~~^~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36