Submission #530744

#	Time	Username	Problem	Language	Result	Execution time	Memory
530744		Cyanmond	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	46 ms	13876 KiB

railroad

#include <bits/stdc++.h>

using i64 = long long;
template <typename T> using Vec = std::vector<T>;

constexpr i64 inf64 = 2000000000000000000;

template <typename T> bool setmin(T &a, const T v) {
    if (a > v) {
        a = v;
        return true;
    }
    return false;
}

long long plan_roller_coaster(std::vector<int> S, std::vector<int> T) {
    const int N = (int)S.size();

    Vec<Vec<i64>> dp(1 << N, Vec<i64>(N, inf64));
    for (int i = 0; i < N; ++i) dp[1 << i][i] = 0;
    for (int bit = 0; bit < (1 << N); ++bit) {
        for (int last = 0; last < N; ++last) {
            if (not(bit & (1 << last))) continue;
            for (int next = 0; next < N; ++next) {
                if (bit & (1 << next)) continue;
                setmin(dp[bit | (1 << next)][next], dp[bit][last] + std::max(0, T[last] - S[next]));
            }
        }
    }

    i64 answer = inf64;
    for (int i = 0; i < N; ++i) setmin(answer, dp[(1 << N) - 1][i]);
    return (long long)answer;
}

• Subtask 1: 11 / 11
• Subtask 2: 23 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36