oj.uz

Submission #950158

# Submission time Handle Problem Language Result Execution time Memory
950158 2024-03-20T05:58:27 Z Pring CONSUL (info1cup19_consul) C++17
100 / 100
 17 ms 456 KB 
#include <bits/stdc++.h>
#include "grader.h"
using namespace std;

#define fs first
#define sc second
#define mp make_pai
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
mt19937 rnd(39393939);

void solve(int n) {
    if (n <= 50) {
        map<int, int> M;
        FOR(i, 1, n + 1) {
            int x = kth(i);
            if (++M[x] > n / 3) {
                say_answer(x);
                return;
            }
        }
        say_answer(-1);
        return;
    }
    vector<int> v;
    set<int> S;
    FOR(i, 1, n + 1) v.push_back(i);
    shuffle(v.begin(), v.end(), rnd);
    while (v.size() > 40) v.pop_back();
    int bound = 59, p = 0;
    while (bound > 0) {
        int id = v[p];
        int x = kth(id);
        bound--;
        if (S.insert(x).sc) {
            int y = cnt(x);
            bound--;
            if (y > n / 3) {
                say_answer(x);
                return;
            }
        }
        if (++p == v.size()) break;
    }
    say_answer(-1);
    return;
}

Compilation message

consul.cpp: In function 'void solve(int)':
consul.cpp:42:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         if (++p == v.size()) break;
      |             ~~~~^~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 344 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 440 KB Output is correct
2 Correct 3 ms 344 KB Output is correct

Subtask #3
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 444 KB Output is correct
2 Correct 10 ms 444 KB Output is correct
3 Correct 4 ms 444 KB Output is correct
4 Correct 4 ms 448 KB Output is correct
5 Correct 10 ms 452 KB Output is correct
6 Correct 10 ms 440 KB Output is correct
7 Correct 9 ms 444 KB Output is correct
8 Correct 11 ms 444 KB Output is correct
9 Correct 10 ms 452 KB Output is correct
10 Correct 10 ms 448 KB Output is correct
11 Correct 12 ms 452 KB Output is correct
12 Correct 9 ms 444 KB Output is correct
13 Correct 11 ms 452 KB Output is correct
14 Correct 9 ms 456 KB Output is correct