Submission #875917

#	Time	Username	Problem	Language	Result	Execution time	Memory
875917		AverageAmogusEnjoyer	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	42 ms	23380 KiB

railroad

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template<class T> bool cmin(T &i, T j) { return i > j ? i=j,1:0; }
template<class T> bool cmax(T &i, T j) { return i < j ? i=j,1:0; }
const int N=16;
const ll inf = 1e18;
ll dp[1<<N][N];
int n;
ll plan_roller_coaster(vector<int> s,vector<int> t) {
    n = int(s.size());
    memset(dp,0x3f,sizeof(dp));
    for (int i=0;i<n;i++) {
        dp[1<<i][i]=0LL;
    }
    for (int mask=1;mask<(1<<n);mask++) {
        for (int i=0;i<n;i++) {
            if (mask&(1<<i)) {
                // possible endpoint
                if (dp[mask][i]<=inf) { 
                    continue;
                }
                for (int j=0;j<n;j++) {
                    if (i!=j&&mask&(1<<j)) {
                        cmin(dp[mask][i],
                              dp[mask^(1<<i)][j]+max(0,t[j]-s[i]));
                    }
                }
            }
        }
    }
    ll ans = inf;
    for (int i=0;i<n;i++) {
        cmin(ans,dp[(1<<n)-1][i]);
    }
    return ans;
}

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