Submission #1315229

#TimeUsernameProblemLanguageResultExecution timeMemory
1315229otariusCave (IOI13_cave)C++20
25 / 100
182 ms580 KiB
#include "cave.h"
#include <bits/stdc++.h>
#include <bits/extc++.h>
using namespace __gnu_pbds;
using namespace std;

// #pragma GCC optimize("Ofast")
// #pragma GCC optimize ("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define ff first
#define sc second
#define pb push_back
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define ull unsigned long long
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rngl(chrono::steady_clock::now().time_since_epoch().count());

// #define int long long
// #define int unsigned long long

// #define ordered_set(T) tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>
// #define ordered_multiset(T) tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>

// const ll mod = 1e9 + 7;
// const ll mod = 998244353;

const ll inf = 1e9;
const ll biginf = 1e18;
// const int maxN;

// #define MAX_N 5000
// #define MAX_CALLS 70000

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

// /* Symbol obfuscation */
// #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;
// }

// int init() {
//     int i, res;
    
//     cin >> N;

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

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

//     num_calls = 0;
//     return N;
// }


void exploreCave(int n) {
    int s[n], d[n], q[n]{};
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) q[j] = s[j];
        for (int j = i; j < n; j++) q[j] = 0;
        
        int now = tryCombination(q);
        if (now > i || now == -1) s[i] = 0;
        else s[i] = 1;
    }
    
    bool used[n]{};
    for (int i = 0; i < n; i++) {
        vector<int> cur;
        for (int j = 0; j < n; j++) {
            if (!used[j]) cur.pb(j), q[j] = 1 - s[j];
            else q[j] = s[j];
        }
        
        int st = tryCombination(q), l = 0, r = (int)cur.size() - 1, m, ans = -1;
        while (l <= r) {
            m = (l + r) / 2;
            for (int j = 0; j <= m; j++) q[cur[j]] = s[cur[j]];
            for (int j = m + 1; j < cur.size(); j++) q[cur[j]] = 1 - s[cur[j]];
            
            int now = tryCombination(q);
            if (now > st || now == -1) {
                ans = m; r = m - 1;
            } else l = m + 1;
        }
        
        d[cur[ans]] = i;
        used[cur[ans]] = 1;
    }
    
    answer(s, d);
}

// int main() {
//     int N;
// 	N = init();
// 	exploreCave(N);
//     printf("INCORRECT\nYour solution did not call answer().\n");
// 	return 0;
// }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...