Submission #799670

#	Time	Username	Problem	Language	Result	Execution time	Memory
799670		Khizri	Roller Coaster Railroad (IOI16_railroad)	C++17	34 / 100	37 ms	10544 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
const int mxn=20;
ll n,dp[(1<<mxn)][mxn];
long long plan_roller_coaster(vector<int> s, vector<int> t) {
    n = (int) s.size();
    for(int mask=1;mask<(1<<n);mask++){
        ll mn=INF;
        if(__builtin_popcount(mask)==1){
            for(int i=0;i<n;i++){
                if(mask&(1<<i)){
                    dp[mask][i]=0;
                }
            }
            continue;
        }
        for(int i=0;i<n;i++){
            if(!(mask&(1<<i))) continue;
            dp[mask][i]=INF;
            for(int j=0;j<n;j++){
                if(!((mask^(1<<i))&(1<<j))) continue;
                dp[mask][i]=min(dp[mask][i],dp[mask^(1<<i)][j]+max(0,t[j]-s[i]));
            }
        }
    }
    ll ans=INF;
    for(int i=0;i<n;i++){
        ans=min(ans,dp[(1<<n)-1][i]);
    }
    return ans;
}
/*
g++ railroad.cpp grader.cpp ; .\a.exe
4
1 7
4 3
5 8
6 6
*/

Compilation message (stderr)

railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:20:12: warning: unused variable 'mn' [-Wunused-variable]
   20 |         ll mn=INF;
      |            ^~

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