Submission #706621

#	Time	Username	Problem	Language	Result	Execution time	Memory
706621		marvinthang	Scales (IOI15_scales)	C++17	76.19 / 100	261 ms	484 KiB

scales

/*************************************
*    author: marvinthang             *
*    created: 06.03.2023 15:25:06    *
*************************************/

#include "scales.h"
#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i--; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> scan_op(pair <U, V>)  { return in >> u.fi >> u.se; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }

// end of template

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); 
long long rand(long long l, long long h) { return uniform_int_distribution <long long> (l, h) (rng); } 

void init(int T) {

}

int Ask(const vector <int> &v) {
    if (v[0] == -0) return getLightest(v[1], v[2], v[3]);
    if (v[0] == -1) return getMedian(v[1], v[2], v[3]);
    if (v[0] == -2) return getHeaviest(v[1], v[2], v[3]);
    return getNextLightest(v[1], v[2], v[3], v[0]);
}

int Ask(const vector <int> &p, vector <int> v) {
    vector <int> q(7);
    REP(i, 6) q[p[i]] = i;
    sort(1 + ALL(v), [&] (int a, int b) { return q[a] < q[b]; });
    if (v[0] < 1) {
        if (v[0] == -0) return v[1];
        if (v[0] == -1) return v[2];
        return v[3];
    }
    FOR(i, 1, 4) if (q[v[i]] > q[v[0]]) return v[i];
    return v[1];
}

void orderCoins() {
    vector <vector <int>> perms, ask;
    vector <int> v {1, 2, 3, 4, 5, 6};
    do perms.push_back(v);
    while (next_permutation(ALL(v)));
    FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
        REP(i, 3) ask.push_back(vector<int>{-i, a, b, c});
        FOR(d, 1, 7) if (d != a && d != b && d != c) ask.push_back(vector<int>{d, a, b, c});
    }
    while (perms.size() > 1) {
        vector <vector <int>> nxt;
        vector <int> ma{ (int) perms.size() + 1, 0, 0};
        for (auto v: ask) {
            vector <int> cnt(7);
            for (auto p: perms) ++cnt[Ask(p, v)];
            vector <int> cur {cnt[v[1]], cnt[v[2]], cnt[v[3]]};
            sort(cur.rbegin(), cur.rend());
            if (cur[0] < ma[0] || (cur[0] == ma[0] && cur[1] < ma[1])) {
                nxt.clear();
                nxt.push_back(v);
                ma = cur;
            } else if (cur[0] == ma[0] && cur[1] == ma[1]) nxt.push_back(v);
        }
        vector <int> v(nxt[rand(0, (int) nxt.size() - 1)]);
        int x = Ask(v);
        nxt.clear();
        for (auto p: perms) if (Ask(p, v) == x) nxt.push_back(p);
        perms = move(nxt);
    }
    int W[6];
    copy(ALL(perms[0]), W);
    answer(W);
}

Compilation message (stderr)

scales.cpp: In function 'void init(int)':
scales.cpp:49:15: warning: unused parameter 'T' [-Wunused-parameter]
   49 | void init(int T) {
      |           ~~~~^
scales.cpp: In function 'void orderCoins()':
scales.cpp:22:48: warning: declaration of '_b' shadows a previous local [-Wshadow]
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:78:18: note: in expansion of macro 'FOR'
   78 |     FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
      |                  ^~~
scales.cpp:22:48: note: shadowed declaration is here
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:78:5: note: in expansion of macro 'FOR'
   78 |     FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
      |     ^~~
scales.cpp:22:48: warning: declaration of '_b' shadows a previous local [-Wshadow]
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:78:31: note: in expansion of macro 'FOR'
   78 |     FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
      |                               ^~~
scales.cpp:22:48: note: shadowed declaration is here
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:78:18: note: in expansion of macro 'FOR'
   78 |     FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
      |                  ^~~
scales.cpp:22:48: warning: declaration of '_b' shadows a previous local [-Wshadow]
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:80:9: note: in expansion of macro 'FOR'
   80 |         FOR(d, 1, 7) if (d != a && d != b && d != c) ask.push_back(vector<int>{d, a, b, c});
      |         ^~~
scales.cpp:22:48: note: shadowed declaration is here
   22 | #define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i)
      |                                                ^~
scales.cpp:78:31: note: in expansion of macro 'FOR'
   78 |     FOR(a, 3, 7) FOR(b, 1, a) FOR(c, 1, b) {
      |                               ^~~
scales.cpp:85:19: warning: declaration of 'v' shadows a previous local [-Wshadow]
   85 |         for (auto v: ask) {
      |                   ^
scales.cpp:75:18: note: shadowed declaration is here
   75 |     vector <int> v {1, 2, 3, 4, 5, 6};
      |                  ^
scales.cpp:96:22: warning: declaration of 'v' shadows a previous local [-Wshadow]
   96 |         vector <int> v(nxt[rand(0, (int) nxt.size() - 1)]);
      |                      ^
scales.cpp:75:18: note: shadowed declaration is here
   75 |     vector <int> v {1, 2, 3, 4, 5, 6};
      |                  ^

• Subtask 1: 76.190476 / 100