Submission #369781

#	Time	Username	Problem	Language	Result	Execution time	Memory
369781		KoD	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	79 ms	11244 KiB

railroad

#include <bits/stdc++.h>
#include "railroad.h"

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

constexpr long long INF = std::numeric_limits<long long>::max() / 2;

long long plan_roller_coaster(Vec<int> s, Vec<int> t) {
    const int n = (int) s.size();
    assert(n <= 16);
    Vec<Vec<long long>> dp(1 << n, Vec<long long>(n, INF));
    for (int i = 0; i < n; ++i) {
        dp[1 << i][i] = 0;
    }
    for (int set = 0; set < (1 << n); ++set) {
        for (int last = 0; last < n; ++last) {
            if (!(set >> last & 1)) {
                continue;
            }
            for (int next = 0; next < n; ++next) {
                if (set >> next & 1) {
                    continue;
                }
                auto &val = dp[set | (1 << next)][next];
                val = std::min(val, dp[set][last] + std::max(t[last] - s[next], 0));
            }
        }
    }
    long long ret = INF;
    for (int i = 0; i < n; ++i) {
        ret = std::min(ret, dp[(1 << n) - 1][i]);
    }
    return ret;
}

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