Submission #424347

#	Time	Username	Problem	Language	Result	Execution time	Memory
424347		MarcoMeijer	Scales (IOI15_scales)	C++14	100 / 100	584 ms	5268 KiB

scales

#include "scales.h"
#include <bits/stdc++.h>
using namespace std;

// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e9
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
#define sz size()
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

// output
template<class T1, class T2> void OUT(const pair<T1,T2>& x);
template<class T> void OUT(const vector<T>& x);
template<class T> void OUT(const T& x) {cerr << x;}
template<class H, class... T> void OUT(const H& h, const T&... t) {OUT(h); OUT(t...); }
template<class T1, class T2> void OUT(const pair<T1,T2>& x) {OUT(x.fi,' ',x.se);}
template<class T> void OUT(const vector<T>& x) {RE(i,x.size()) OUT(i==0?"":" ",x[i]);}
template<class... T> void OUTL(const T&... t) {OUT(t..., "\n"); }
template<class H> void OUTLS(const H& h) {OUTL(h); }
template<class H, class... T> void OUTLS(const H& h, const T&... t) {OUT(h,' '); OUTLS(t...); }

vector<vi> possible, queries;
int qMem[120][720];
map<vi,int> mem[10];

int getRes(vi v, vi q) {
    if(q[0] <= 3) {
        int cnt = 0;
        RE(i,6) {
            RE1(j,3) if(v[i] == q[j]) cnt++;
            if(cnt == q[0]) {
                RE1(j,3) if(v[i] == q[j]) return j-1;
            }
        }
    } else {
        int beg = 0;
        RE(i,6) {
            if(beg) RE1(j,3) if(v[i] == q[j]) return j-1;
            if(v[i] == q[4]) beg = 1;
            if(i == 5) i = -1;
        }
    }
    return -1;
}
int askQuery(vi q) {
    if(q[0] == 1) return getLightest    (q[1],q[2],q[3]);
    if(q[0] == 2) return getMedian      (q[1],q[2],q[3]);
    if(q[0] == 3) return getHeaviest    (q[1],q[2],q[3]);
    if(q[0] == 4) return getNextLightest(q[1],q[2],q[3],q[4]);
    return -1;
}

void init(int T) {
    vi v = {1,2,3,4,5,6};
    RE(i,720) {
        possible.pb(v);
        next_permutation(all(v));
    }

    RE1(i,6) RE1(j,i-1) RE1(k,j-1) {
        RE1(l,3) queries.pb({l,i,j,k});
        RE1(l,k-1) {
            queries.pb({4,j,k,l,i});
            queries.pb({4,i,k,l,j});
            queries.pb({4,i,j,l,k});
            queries.pb({4,i,j,k,l});
        }
    }

    RE(i,120) RE(j,720) qMem[i][j] = getRes(possible[j], queries[i]);
}

int getNext(vi a, int depth) {
    auto it = mem[depth].find(a);
    if(it != mem[depth].end())
        return it->second;
    if(depth == 0)
        return a.size() <= 1 ? 0 : -1;
    
    vi inter;
    int mn = 1e9;
    RE(i,120) {
        int cnt[]={0,0,0};
        FOR(j,a) cnt[qMem[i][j]]++;
        sort(cnt,cnt+3);

        if(mn > cnt[2])
            mn = cnt[2], inter.clear();
        if(mn == cnt[2])
            inter.pb(i);
    }

    FOR(i,inter) {
        vi nxt[3];
        FOR(j,a) nxt[qMem[i][j]].pb(j);
        bool pos = true;
        RE(j,3) if(getNext(nxt[j],depth-1) == -1) pos = false;
        if(!pos) continue;
        return mem[depth][a] = i;
    }

    return mem[depth][a] = -1;
}

void orderCoins() {
    vi a;
    RE(i,720) a.pb(i);

    int depth = 6;
    while(a.size() != 1) {
        int nxt = getNext(a,depth--);
        int res = askQuery(queries[nxt]);
        vi na;
        FOR(i,a)
            if(queries[nxt][qMem[nxt][i]+1] == res)
                na.pb(i);
        a = na;
    }

    int W[] = {0, 0, 0, 0, 0, 0};
    RE(i,6) W[i] = possible[a[0]][i];
    answer(W);
}

Compilation message (stderr)

scales.cpp: In function 'void init(int)':
scales.cpp:74:15: warning: unused parameter 'T' [-Wunused-parameter]
   74 | void init(int T) {
      |           ~~~~^

• Subtask 1: 100 / 100