Submission #100015

#	Time	Username	Problem	Language	Result	Execution time	Memory
100015		owl10124	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	80 ms	10132 KiB

railroad

#include <bits/stdc++.h>
#include "railroad.h"
using namespace std;
typedef long long ll;
typedef pair<int,int> ii;

vector<ii> segs;

int n;

ll m[8][65536];

ll dp(int seg, int bm) {
    if (m[seg][bm]+1) return m[seg][bm];
    if (bm==(1<<n)-1) return m[seg][bm]=0;
    ll l = 1ll<<62;
    for (int i=0;i<n;i++) {
        if (((1<<i)&~bm)) l=min(l,(seg!=-1&&segs[seg].second>segs[i].first?segs[seg].second-segs[i].first:0)+dp(i,bm|(1<<i)));
    }
    //printf("%d %d %d %lld\n",segs[seg].second,seg,bm,l);
    return m[seg][bm]=l;
}

ll plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    fill(&m[0][0],&m[n][0],-1);
    n = (int) s.size();
    for (int i=0;i<n;i++) segs.push_back(make_pair(s[i],t[i]));
    return dp(-1,0);
}

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