Submission #520337

#	Time	Username	Problem	Language	Result	Execution time	Memory
520337		silverfish	Scales (IOI15_scales)	C++17	0 / 100	2 ms	460 KiB

scales

#include "scales.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
const int INF = 1000;

int index_of[6];
map<int, int[6]> ans;

int nextl(int a, int b, int c, int d) {
    int al = 1;    
    a--; b--; c--; d--;

    if (index_of[a] > index_of[d] || index_of[b] > index_of[d] || index_of[c] > index_of[d])
        al = 0;

    if (al == 1) {
        if (index_of[a] < index_of[b] && index_of[a] < index_of[c])
            return a + 1;
    
        if (index_of[b] < index_of[a] && index_of[b] < index_of[c])
            return b + 1;

        return c + 1;
    }

    if (index_of[a] > index_of[d]) {
        if ((index_of[a] < index_of[b] || index_of[b] < index_of[d]) && (index_of[a] < index_of[c] || index_of[c] < index_of[d]))
            return a + 1;
    }

    if (index_of[b] > index_of[d]) {
        if ((index_of[b] < index_of[a] || index_of[a] < index_of[d]) && (index_of[b] < index_of[c] || index_of[c] < index_of[d]))
            return b + 1;
    }

    return c + 1;
}

int mid(int a, int b, int c) {
    a--; b--; c--;

    if (index_of[b] < index_of[a] && index_of[a] < index_of[c])
        return a + 1;

    if (index_of[c] < index_of[a] && index_of[a] < index_of[b])
        return a + 1;

    if (index_of[a] < index_of[b] && index_of[b] < index_of[c])
        return b + 1;

    if (index_of[c] < index_of[b] && index_of[b] < index_of[a])
        return b + 1;

    return c + 1;
}

int heavy(int a, int b, int c) {
    a--; b--; c--;

    if (index_of[a] > index_of[b] && index_of[a] > index_of[c])
        return a + 1;

    if (index_of[b] > index_of[a] && index_of[b] > index_of[c])
        return b + 1;

    return c + 1;
}

int light(int a, int b, int c) {
    a--; b--; c--;

    if (index_of[a] < index_of[b] && index_of[a] < index_of[c])
        return a + 1;
    
    if (index_of[b] < index_of[a] && index_of[b] < index_of[c])
        return b + 1;

    return c + 1;
}

void init(int T) {
	vector<int> p = {1, 2, 3, 4, 5, 6};
	map<int,int> cnt;
	do{
		for(int i = 0; i < 6; ++i) index_of[p[i]-1] = i;

		vector<int> q;
		q.pb(nextl(6,5,1,2));
		q.pb(nextl(5,4,6,1));
		q.pb(nextl(5,6,2,4));
		q.pb(nextl(6,2,1,3));
		q.pb(nextl(5,6,4,3));
		q.pb(mid(1,2,3));
		q.pb(mid(4,5,6));
		q.pb(mid(3,4,5));
		reverse(q.begin(), q.end());
		int mul = 1, cur = 0;
		for(int x : q){
			cur += mul*x;	
			mul *= 10;
		}
		
		int v = 0;
		mul = 1;
		for(int i = 0; i < 6; ++i){
			ans[cur][i] = p[i];
		}
		++cnt[cur];
	}while(next_permutation(p.begin(), p.end()));

	int mx = 0, mxpos;
	for(auto [x,c] : cnt){
		if(c > mx){
			mx = c;
			mxpos = x;
		}
	}
//	cout << mx << ' ' << mxpos << '\n';
	return;
}
 
void orderCoins() {
	vector<int> q;
	q.pb(getNextLightest(6,5,1,2));
	q.pb(getNextLightest(5,4,6,1));
	q.pb(getNextLightest(5,6,2,4));
	q.pb(getNextLightest(6,2,1,3));
	q.pb(getNextLightest(5,6,4,3));
	q.pb(getMedian(1,2,3));
	q.pb(getMedian(4,5,6));
	q.pb(getMedian(3,4,5));
	reverse(q.begin(), q.end());
	int mul = 1, cur = 0;
	for(int x : q){
		cur += mul*x;	
		mul *= 10;
	}

	//cout << cur << '\n';
	for(int i = 0; i < 6; ++i) cout << ans[cur][i] << ' ';
	cout << '\n';
	answer(ans[cur]);
	return;
}

Compilation message (stderr)

scales.cpp: In function 'void init(int)':
scales.cpp:104:7: warning: unused variable 'v' [-Wunused-variable]
  104 |   int v = 0;
      |       ^
scales.cpp:112:14: warning: variable 'mxpos' set but not used [-Wunused-but-set-variable]
  112 |  int mx = 0, mxpos;
      |              ^~~~~
scales.cpp:82:15: warning: unused parameter 'T' [-Wunused-parameter]
   82 | void init(int T) {
      |           ~~~~^

• Subtask 1: 0 / 100