Submission #119162

#	Time	Username	Problem	Language	Result	Execution time	Memory
119162		someone_aa	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	65 ms	10652 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
using namespace std;
const int maxn = 17;
ll dp[maxn][(1<<maxn)], n;

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    n = (int) s.size();

    for(int i=1;i<(1<<n);i++) {
        //cout<<i<<": \n";
        for(int c=0;c<n;c++) {
            if(!((1<<c)&i)) continue;

            dp[c][i] = LLONG_MAX;
            if(__builtin_popcount(i) == 1) {
                dp[c][i] = 0;
            }
            else {
                for(int p=0;p<n;p++) {
                    if(!((1<<p)&i) || c == p) continue;
                    ll cost = max(0LL, 1LL * t[p] - s[c]);
                    dp[c][i] = min(dp[c][i], dp[p][(i^(1<<c))] + cost);
                }
            }
            //cout<<c<<" - "<<dp[c][i]<<"\n";
        }
    }

    ll result = LLONG_MAX;
    for(int i=0;i<n;i++) {
        result = min(result, dp[i][(1<<n)-1]);
    }

    return result;
}

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