oj.uz

답안 #434583

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
434583 2021-06-21T12:25:44 Z KoD Sure Bet (CEOI17_sure) C++17
100 / 100
 149 ms 2808 KB 
#include <bits/stdc++.h>

template <class T> using Vec = std::vector<T>;

int parse() {
    std::string s;
    std::cin >> s;
    const auto t = s.find('.');
    if (t >= s.size()) {
        return 10000 * std::stoi(s);
    }
    while (t + 4 >= s.size()) {
        s.push_back('0');
    }
    return 10000 * std::stoi(s.substr(0, t)) + std::stoi(s.substr(t + 1));
}

int main() {
    int N;
    std::cin >> N;
    Vec<int> A(N), B(N);
    for (int i = 0; i < N; ++i) {
        A[i] = parse();
        B[i] = parse();
    }
    std::sort(A.rbegin(), A.rend());
    std::sort(B.rbegin(), B.rend());
    long long ok = 0, ng = 1000000000000 + 5;
    while (ng - ok > 1) {
        const auto md = (ok + ng) / 2;
        int l = 0, r = 0;
        long long ls = 0, rs = 0;
        bool f = false;
        for (int k = 1; k <= 2 * N; ++k) {
            const auto need = md + k * 10000;
            while (l < N and ls < need) {
                ls += A[l];
                l += 1;
            }
            while (r < N and rs < need) {
                rs += B[r];
                r += 1;
            }
            if (ls >= need and rs >= need and l + r <= k) {
                f = true;
                break;
            }
        }
        (f ? ok : ng) = md;
    }
    std::cout << ok / 10000 << '.' << std::setw(4) << std::setfill('0') << ok % 10000 << '\n';
    return 0;
}

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 288 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 2 ms 204 KB Output is correct
13 Correct 2 ms 204 KB Output is correct
14 Correct 3 ms 300 KB Output is correct
15 Correct 2 ms 204 KB Output is correct
16 Correct 2 ms 304 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 288 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 2 ms 204 KB Output is correct
13 Correct 2 ms 204 KB Output is correct
14 Correct 3 ms 300 KB Output is correct
15 Correct 2 ms 204 KB Output is correct
16 Correct 2 ms 304 KB Output is correct
17 Correct 136 ms 2464 KB Output is correct
18 Correct 127 ms 2332 KB Output is correct
19 Correct 149 ms 2372 KB Output is correct
20 Correct 138 ms 2340 KB Output is correct
21 Correct 129 ms 2808 KB Output is correct
22 Correct 120 ms 2440 KB Output is correct
23 Correct 132 ms 2332 KB Output is correct
24 Correct 139 ms 2340 KB Output is correct
25 Correct 122 ms 2336 KB Output is correct
26 Correct 138 ms 2716 KB Output is correct