Submission #254653

#	Time	Username	Problem	Language	Result	Execution time	Memory
254653		Hehehe	Wiring (IOI17_wiring)	C++14	20 / 100	69 ms	32000 KiB

wiring

#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define rc(s) return cout<<s,0
#define pi pair <ll, ll>
#define sz(x) (int)((x).size())

#include "wiring.h"

const int N = 2e3 + 11;
const ll INF64 = 3e18 + 1;

ll dp[N][N];

ll min_total_length(vector<int> r, vector<int> b){
    vector<ll>red, blue;

    red.push_back(0);
    blue.push_back(0);

    for(auto it : r)red.push_back((ll)it);
    for(auto it : b)blue.push_back((ll)it);
    
    if(red[sz(r)] <= blue[1]){
        ll ans = 0;
    
        for(int i = 1; i < sz(red); i++){
            ans += (red[sz(red) - 1] - red[i]);
        }
    
        for(int i = 1; i < sz(blue); i++){
            ans += (blue[i] - blue[1]);
        }
    
        ans += max(sz(r), sz(b))*(blue[1] - red[sz(r)]);

        return ans;
    }
    
    if(sz(r) <= 200 && sz(b) <= 200){
        
        memset(dp, 0x3f, sizeof(dp));

        dp[0][0] = 0;

        for(int i = 1; i < sz(red); i++){
            for(int j = 1; j < sz(blue); j++){
                dp[i][j] = min({dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]}) + abs(red[i] - blue[j]);
            }
        }

        return dp[sz(red) - 1][sz(blue) - 1];
    }
    
    ll ans = 0;
    
    vector<pi>v;
    
    v.push_back({-1, -1});
    
    for(auto it : r){
        v.push_back({it, 0});
    }
    
    for(auto it : b){
        v.push_back({it, 1});
    }
    
    sort(all(v));
    
    for(int l = 1; l < sz(v); l += 7){
            
        vector<ll>R, B;
    
        R.pb(0);
        B.pb(0);
            
        for(int i = l; i < min(l + 7, sz(v)); i++){
            if(v[i].ss == 0){
                R.push_back(v[i].ff);
            }else B.push_back(v[i].ff);
        }
        
        for(int i = 1; i < sz(R); i++){
            for(int j = 1; j < sz(B); j++){
                dp[i][j] = INF64;
            }
        }
        
        dp[0][0] = 0;
        
        for(int i = 1; i < sz(R); i++){
            for(int j = 1; j < sz(B); j++){
                dp[i][j] = min({dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]}) + abs(R[i] - B[j]);
            }
        }
        
        ans += dp[sz(R) - 1][sz(B) - 1];
    }
    
    return ans;
}

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