제출 #117508

#제출 시각아이디문제언어결과실행 시간메모리
117508ckodserPalembang Bridges (APIO15_bridge)C++14
0 / 100
2 ms384 KiB
#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; }
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