Submission #117508

#	Time	Username	Problem	Language	Result	Execution time	Memory
117508		ckodser	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	2 ms	384 KiB

bridge

#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#if __cplusplus >= 201103L
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#endif

int gcd(int a, int b) {return b == 0 ? a : gcd(b, a % b);}

#define ll long long
#define pb push_back
#define ld long double
#define mp make_pair
#define F first
#define S second
#define pii pair<ll,ll> 

using namespace :: std;

const ll maxn=1e5+500;
const ll inf=1e9+800;

ll l[maxn];
ll r[maxn];
ll n,k;
ll mn=inf,mx=0;

ll findSumD(ll L,ll R){
	ll ans=0;
	for(ll i=0;i<n;i++){
		if((l[i]<=L && L<=r[i])|| (l[i]<=R && R<=r[i])){
			continue;
		}
		if(l[i]<L){
			ans+=2*(L-r[i]);
		}
		else if(R<l[i]){
			ans+=2*(l[i]-R);
		}else{
			ans+=2*min(l[i]-L,R-r[i]);
		}
	}
	return ans;
}
ll findAns(ll mid){
	if(k==1){
		return findSumD(mid,2*inf);
	}
	ll ans=inf*maxn;
	ll b=mid+1;
	ll e=mx;
	while(e-b>2){
		ll mid1=b+(e-b)/3;
		ll mid2=b+(e-b)*2/3;
		ll g1=findSumD(mid,mid1);
		ll g2=findSumD(mid,mid2);
		ans=min(ans,g1);
		ans=min(ans,g2);
		if(g1<g2){
			e=mid2;
		}else{
			b=mid1;
		}
	}
	for(ll i=b;i<=e;i++){
		ans=min(ans,findSumD(mid,i));
	}
	
	b=mn;
	e=mid;
	while(e-b>2){
		ll mid1=b+(e-b)/3;
		ll mid2=b+(e-b)*2/3;
		ll g1=findSumD(mid1,mid);
		ll g2=findSumD(mid2,mid);
		ans=min(ans,g1);
		ans=min(ans,g2);
		if(g1<g2){
			e=mid2;
		}else{
			b=mid1;
		}
	}
	for(ll i=b;i<=e;i++){
		ans=min(ans,findSumD(i,mid));
	}
	return ans;
}	

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);	
	cin>>k>>n;
	ll sum=0;
	for(ll i=0;i<n;i++){
		char C,T;
		ll L,R;
		cin>>C>>L>>T>>R;
		sum+=(abs(R-L));
		if(C==T){
			n--;
			i--;
		}else{
			sum++;
			l[i]=min(L,R);
			r[i]=max(L,R);
			mn=min(mn,l[i]);
			mx=max(mx,r[i]);
		}
	}	
	ll b=mn;
	ll e=mx;
	ll ans=inf*maxn;
	while(e-b>2){
		ll mid1=b+(e-b)/3;
		ll mid2=b+(e-b)*2/3;
		ll g1=findAns(mid1);
		ll g2=findAns(mid2);
		ans=min(ans,g1);
		ans=min(ans,g2);
		if(g1<g2){
			e=mid2;
		}else{
			b=mid1;
		}
	}
	for(ll i=b;i<=e;i++){
		ans=min(ans,findAns(i));
	}
	cout<<ans+sum;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37