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답안 #1030439

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1030439 2024-07-22T05:07:47 Z shiomusubi496 커다란 상품 (IOI17_prize) C++17
0 / 100
 1000 ms 5720 KB 
#include "prize.h"

#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep2(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define rrep(i, n) for (int i = (int)(n) - 1; i >= 0; --i)
#define rrep2(i, a, b) for (int i = (int)(b) - 1; i >= (int)(a); --i)

#define all(v) begin(v), end(v)
#define rall(v) rbegin(v), rend(v)

using namespace std;

using ll = long long;

template<class T, class U> bool chmin(T& a, const U& b) { return a > b ? a = b, true : false; }
template<class T, class U> bool chmax(T& a, const U& b) { return a < b ? a = b, true : false; }

vector<int> perm;

vector<vector<int>> memo;
vector<int> Ask(int n) {
    n = perm[n];
    if (memo[n].empty()) memo[n] = ask(n);
    return memo[n];
}

int solve(int n) {
    int cnt = 0, xx = 500;
    rep (i, 500) {
        auto res = Ask(i);
        chmax(cnt, res[0] + res[1]);
        if (res[0] + res[1] == 0) return i;
        if (cnt >= 30) {
            xx = i + 1;
            break;
        }
    }
    int x = xx;
    while (x < n) {
        int y = 0;
        while (x < n) {
            auto res = Ask(x);
            if (res[0] + res[1] == 0) return x;
            if (res[0] + res[1] == cnt) {
                y = res[0];
                break;
            }
            ++x;
        }
        int ok = xx, ng = n;
        while (ng - ok > 1) {
            int mid = (ok + ng) / 2;
            if (mid <= x) ok = mid;
            else {
                auto res = Ask(mid);
                if (res[0] + res[1] == 0) return mid;
                if (res[0] + res[1] < cnt) ng = mid;
                else if (res[0] > y) ng = mid;
                else ok = mid;
            }
        }
        x = ok + 1;
    }
}

int find_best(int n) {
    memo.assign(n, {});
    perm.resize(n); iota(all(perm), 0);
    mt19937 mt(random_device{}());
    shuffle(all(perm), mt);
    int x = solve(n);
    return perm[x];
}

Compilation message

prize.cpp: In function 'int solve(int)':
prize.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type]
   66 | }
      | ^

Subtask #1
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3040 ms 5720 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3038 ms 5720 KB Time limit exceeded
2 Halted 0 ms 0 KB -