Submission #247664

#	Time	Username	Problem	Language	Result	Execution time	Memory
247664		MarcoMeijer	Wiring (IOI17_wiring)	C++14	0 / 100	1094 ms	13800 KiB

wiring

#include "wiring.h"
#include <bits/stdc++.h>
using namespace std;

//macros
typedef long long ll;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define INF 1e18
#define pb push_back
#define fi first
#define se second
#define sz size()

const int MX = 6e5;

priority_queue<ii, vii, greater<ii>> pq;
int n[2], p[2], m=0;
vi f[2];
ll a[MX], b[MX], sm[MX];
ll dp[MX], ch[MX];
ll md[MX];
ll ans=0;

ll min_total_length(std::vector<int> R, std::vector<int> B) {
    f[0] = R; f[1] = B;
    RE(i,2) n[i] = f[i].sz;

    // fill a and b
    RE(i,2) RE(j,n[i]) pq.push({f[i][j], i});
    while(!pq.empty()) {
        a[m] = pq.top().fi;
        b[m] = pq.top().se;
        pq.pop(); m++;
    }

    ch[0]=0; md[0]=0; sm[0]=0;
    REP(i,1,m) {
        md[i] = md[i-1];
        ch[i] = ch[i-1];
        sm[i] = sm[i-1] + a[i-1];
        if(b[i] != b[i-1]) ch[i]++, md[i]=i;
    }
    sm[m] = sm[m-1]+a[m-1];

    dp[0] = 0;
    REP(i,1,m+1) {
        ll mn=INF;
        dp[i] = INF;
        REV(j,md[max(0ll,md[i-1]-1)],md[i-1]) {
            mn = min(mn, dp[j]);
            ll bg = j, ed = i-1;
            ll mid = md[ed];
            ll cost = 0;
            cost += a[mid-1]*(mid-bg) - (sm[mid]-sm[bg]);
            cost += (sm[ed+1]-sm[mid]) - a[mid]*(ed+1-mid);
            cost += (a[mid]-a[mid-1])*max(mid-bg,ed-mid+1);
            dp[i] = min(dp[i], mn + cost);
        }
    }

	return dp[m];
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45