Submission #202776

#	Time	Username	Problem	Language	Result	Execution time	Memory
202776		ZloyHR	Wiring (IOI17_wiring)	C++17	100 / 100	692 ms	8928 KiB

wiring

#include "wiring.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<pll,ll> plll;
typedef pair<pll,pll> ppll;
typedef long double ld;

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define fst first
#define snd second
#define ins insert
#define pb push_back
template< typename T,typename V>ostream &operator<< (ostream &out,const pair<T,V> x){ out << "{" << x.fst << " : " << x.snd << "}"; return out;}template< typename T>ostream &operator<< (ostream &out,const set<T> x){ for(auto &it : x){ out << it << " "; } return out;}template< typename T>ostream &operator<< (ostream &out,const multiset<T> x){ for(auto &it : x){ out << it << " "; } return out;}template< typename T,typename V>ostream &operator<< (ostream &out,const map<T,V> x){ for(auto &it : x){ out << "[" << it.fst << "]" << " = " << it.snd << "\n"; } return out;}template< typename T>ostream &operator<< (ostream &out,const vector<T> x){ for(int i = 0;i < x.size() - 1; ++i){ out << x[i] << " "; } out << x.back(); return out;}template< typename T>ostream &operator<< (ostream &out,const vector<vector<T> > x){ for(int i = 0;i < x.size() - 1; ++i){ out << "[" << i << "]" << " = {" << x[i] << "}\n"; } out << "[" << x.size() - 1 << "]" << " = {" << x.back() << "}\n"; return out;}

const ll N = 1e6 + 5;
const ll MOD = 1e9 + 7;
const ll INF = 1e17;
vector<pll> a;
ll dp[N];
long long min_total_length(std::vector<int> r, std::vector<int> b) {
    ll n = r.size(),m = b.size();
    for(ll i = 0;i < n; ++i){
        ll x;
        x = r[i];
        a.pb({x,0});
    }
    for(ll i = 0;i < m; ++i){
        ll x;
        x = b[i];
        a.pb({x,1});
    }
    a.pb({-1,-1});
    dp[0] = 0;
    sort(all(a));
    ll mnb = INF;
    ll sumb = 0;
    ll cntb = 0;
    ll cnta = 0,mxa = 0,suma = 0,id = INF,bsuma = 0,bmxa = 0,bcnta = 0;
    for(int i = 1;i < a.size(); ++i){
        dp[i] = INF;
        if(i == 1 || a[i].snd != a[i - 1].snd){
            cntb = 1;
            mnb = a[i].fst;
            sumb = 0;
            cnta = 0,mxa = 0,suma = 0,id = INF;
        }else{
            sumb += a[i].fst - mnb;
            cntb++;
        }
        int opr = INF;
        for(int j = min(i - cntb,id);j > 0; --j){
            if(j == id){
                opr = 1000;
                suma = bsuma;
                mxa = bmxa;
                cnta = bcnta;
            }else{
                cnta++;
                mxa = max(mxa,a[j].fst);
                if(j < i - cntb && a[j].snd != a[j + 1].snd)break;
                suma += mxa - a[j].fst;
            }
            if(dp[j - 1] + sumb + suma + max(cnta,cntb) * (mnb - mxa) < dp[i]){
                dp[i] = min(dp[i],dp[j - 1] + sumb + suma + max(cnta,cntb) * (mnb - mxa));
                id = j;
                bsuma = suma;
                bmxa = mxa;
                bcnta = cnta;
            }else{
                if(!opr)break;
                opr--;
            }
        }
        for(int j = i - 1;j >= 1; --j){
            if(dp[j] <= dp[j + 1])break;
            dp[j] = min(dp[j],dp[j + 1]);
        }
    }
	return dp[n + m];
}

Compilation message (stderr)

wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 1;i < a.size(); ++i){
                   ~~^~~~~~~~~~
wiring.cpp:53:19: warning: overflow in implicit constant conversion [-Woverflow]
         int opr = INF;
                   ^~~

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