Submission #135799

#	Time	Username	Problem	Language	Result	Execution time	Memory
135799		Runtime_error_	Roller Coaster Railroad (IOI16_railroad)	C++14	34 / 100	104 ms	17912 KiB

railroad

#include "railroad.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const ll inf = 17 , MX = 1e18+9;
ll n,s[inf],t[inf],dp[(1<<inf)][inf];

ll solve(ll mask,ll cur){

    if(mask == (1ll<<n)-1ll)
        return 0;
    ll &ret = dp[mask][cur];
    if(ret != -1)
        return ret;
    ret = MX;
    for(int i=0;i<n;i++)
        if(!(mask & (1ll<<i) ) )
            ret = min(ret , solve( mask | (1ll<<i) , i ) + max( 0ll , t[cur] - s[i] ) );

    return ret;
}

long long plan_roller_coaster(vector<int> S, vector<int> T) {
    ll ans = MX;
    n = (ll) S.size();
    for(ll i=0;i<n;i++)
        s[i] = S[i],t[i] = T[i];

    memset(dp,-1,sizeof(dp));

    for(int i=0;i<n;i++)
        ans = min( ans , solve((1<<i),i) );
    return ans;
}

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