Submission #809204

#	Time	Username	Problem	Language	Result	Execution time	Memory
809204		Boomyday	Cave (IOI13_cave)	C++14	100 / 100	645 ms	716 KiB

cave

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;
using db = double;
using str = string; // yay python!

using ii = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;

using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vii = vector<ii>;
using vpl = vector<pl>;
using vpd = vector<pd>;

#define tcT template<class T
#define tcTU tcT, class U

tcT> using V = vector<T>;
tcT, size_t SZ> using AR = array<T,SZ>;
tcT> using PR = pair<T,T>;

// pairs
#define mp make_pair

#define s second



#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

#define len(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pb push_back
#define eb emplace_back
#define pf push_front

const int MOD = 1e9+7; // 998244353;
const int MX = 1e5+5;
const ll INF = 1e18; // not too close to LLONG_MAX
const ld PI = acos((ld)-1);
const int dx[4] = {1,0,-1,0}, dy[4] = {0,1,0,-1}; // for every grid problem!!

/*




#include <stdio.h>
#include <stdlib.h>


#define MAX_N 5000
#define MAX_CALLS 70000

#define fail(s, x...) do { \
		fprintf(stderr, s "\n", ## x); \
		exit(1); \
	} while(0)


#define N koala
#define realS kangaroo
#define realD possum
#define inv platypus
#define num_calls echidna

static int N;
static int realS[MAX_N];
static int realD[MAX_N];
static int inv[MAX_N];
static int num_calls;

void answer(int S[], int D[]) {
    int i;
    int correct = 1;
    for (i = 0; i < N; ++i)
        if (S[i] != realS[i] || D[i] != realD[i]) {
            correct = 0;
            break;
        }

    if (correct)
        printf("CORRECT\n");
    else
        printf("INCORRECT\n");

    for (i = 0; i < N; ++i) {
        if (i > 0)
            printf(" ");
        printf("%d", S[i]);
    }
    printf("\n");

    for (i = 0; i < N; ++i) {
        if (i > 0)
            printf(" ");
        printf("%d", D[i]);
    }
    printf("\n");

    exit(0);
}

int tryCombination(int S[]) {
    int i;

    if (num_calls >= MAX_CALLS) {
        printf("INCORRECT\nToo many calls to tryCombination().\n");
        exit(0);
    }
    ++num_calls;

    for (i = 0; i < N; ++i)
        if (S[inv[i]] != realS[inv[i]])
            return i;
    return -1;
}
*/
#include "cave.h"
void exploreCave(int N) {
    unordered_set<int> toIgnore;
    int vals[N];
    int doors[N];

    int cc;




    F0R(lev,N){
        vector<int> cands;
        F0R(i,N){
            if (toIgnore.find(i)==toIgnore.end()){
                cands.pb(i);
                vals[i]=0;
            }
        }

        if (tryCombination(vals) != lev) {
            cc=0;
        } else cc=1;
        F0R(i,N){
            if (toIgnore.find(i)==toIgnore.end()){

                vals[i]=cc;
            }
        }

        while (cands.size()>1){
            int half = cands.size()/2;
            vi reject_cands;
            F0R(i, half){
                int x = cands.back();
                cands.pop_back();
                reject_cands.pb(x);
            }
            trav(i, reject_cands) {
                vals[i] = 1-cc;
            }

            if (tryCombination(vals)!=lev){
                //success!
            }
            else {
                trav(i, reject_cands) {
                    vals[i]=cc;
                }
                trav(i, cands){
                    vals[i] = 1-cc;
                }
                cands = reject_cands;
            }


        }
        //cout << "cnd " << cands[0] << " cc " << vals[cands[0]] << endl;
        toIgnore.insert(cands[0]);
        doors[cands[0]] = lev;
        //cout << "------------------------------------------------"<<endl;
    }
    answer(vals,doors);

}
/*
int init() {
    int i, res;

    FILE *f = fopen("cave.in", "r");
    if (!f)
        fail("Failed to open input file.");

    res = fscanf(f, "%d", &N);

    for (i = 0; i < N; ++i) {
        res = fscanf(f, "%d", &realS[i]);
    }
    for (i = 0; i < N; ++i) {
        res = fscanf(f, "%d", &realD[i]);
        inv[realD[i]] = i;
    }

    num_calls = 0;
    return N;
}




int main() {
    int N;
    N = init();
    exploreCave(N);
    printf("INCORRECT\nYour solution did not call answer().\n");
    return 0;
}*/

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24