結果
問題 | No.2546 Many Arithmetic Sequences |
ユーザー | 👑 potato167 |
提出日時 | 2023-11-24 22:04:52 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,119 bytes |
コンパイル時間 | 2,507 ms |
コンパイル使用メモリ | 216,336 KB |
実行使用メモリ | 17,632 KB |
最終ジャッジ日時 | 2024-09-26 09:56:12 |
合計ジャッジ時間 | 6,849 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | WA | - |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | AC | 105 ms
17,292 KB |
testcase_29 | AC | 104 ms
16,980 KB |
testcase_30 | AC | 103 ms
17,428 KB |
testcase_31 | AC | 102 ms
16,980 KB |
testcase_32 | AC | 101 ms
16,840 KB |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | AC | 2 ms
6,940 KB |
testcase_38 | AC | 2 ms
6,944 KB |
ソースコード
#include <bits/stdc++.h> #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") using namespace std; using std::cout; using std::cin; using std::endl; using ll=long long; using ld=long double; const ll ILL=2167167167167167167; const int INF=2100000000; const int mod=998244353; #define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++) #define all(p) p.begin(),p.end() template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>; template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();} template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();} template<class T> bool chmin(T &a,const T &b){if(a>b){a=b;return 1;}else return 0;} template<class T> bool chmax(T &a,const T &b){if(a<b){a=b;return 1;}else return 0;} template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());} template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});} void yneos(bool a,bool upp=0){if(a) cout<<(upp?"YES\n":"Yes\n"); else cout<<(upp?"NO\n":"No\n");} template<class T> void vec_out(vector<T> &p,int ty=0){ if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";} else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}} template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;} template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;} template<class T> T vec_sum(vector<T> &a){assert(!a.empty());T ans=a[0]-a[0];for(auto &x:a) ans+=x;return ans;} int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;} namespace po167{ //F={a_ix + b_i} //add ax+b in F //return min(f(x) (in F)) //add a is strictly decrease //need a <= 1e9, b <= 1e18 struct Convex_Hull_Trick_Weak{ void add_Lfunction(long long a,long long b){ while(size>1){ if(a==A[size-1]&&B[size-1]>b){ size--; continue; }if(a==A[size-1]&&B[size-1]<=b) return ; long long X=B[size-1]-B[size-2]; long long Y=A[size-1]-a; long long Z=b-B[size-1]; long long W=A[size-2]-A[size-1]; if(X<=0&&0<=Z) break; if(X>=0&&0>=Z){ size--; continue; } if(X/W<=Z/Y){ if(X/W<Z/Y) break; if(Y*(X%W)<=W*(Z%Y)) break; } //if((B[size-1]-B[size-2])*(A[size-1]-a)<=(b-B[size-1])*(A[size-2]-A[size-1])) break; size--; } if(size==(int)A.size()) A.push_back(0),B.push_back(0); A[size]=a; B[size]=b; size++; } long long min_f(long long x){ assert(size!=0); int l=-1,r=size-1; while(r-l>1){ int med=(l+r)/2; if(A[med]*x+B[med]<A[med+1]*x+B[med+1]){ r=med; }else l=med; } return A[r]*x+B[r]; } private: std::vector<long long> A; std::vector<long long> B; int size=0; }; } using po167::Convex_Hull_Trick_Weak; void solve(); // oddloop int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int t=1; //cin>>t; rep(i,0,t) solve(); } void solve(){ ll N,M; cin>>N>>M; vector<ll> A(N),D(N); priority_queue<pair<ll,int>> pq; auto f=[&](int ind,ll len) -> ll { return (len*(len-1)/2)*D[ind]+len*A[ind]; }; rep(i,0,N){ cin>>A[i]>>D[i]; if(D[i]<=0) pq.push({A[i],i}); } ll ans=-ILL; if(pq.empty()){ rep(i,0,N){ chmax(ans,f(i,M)); } cout<<ans<<"\n"; return; } vector<ll> p(M+1); rep(i,0,M){ auto tmp=pq.top(); pq.pop(); p[i+1]=p[i]+tmp.first; tmp.first+=D[tmp.second]; pq.push(tmp); } vector<pair<ll,ll>> q; rep(i,0,N){ if(D[i]>0) q.push_back({D[i],A[i]*2ll-D[i]}); } if(q.empty()){ cout<<p[M]<<"\n"; return; } return; So(q); Convex_Hull_Trick_Weak C; for(auto x:q) C.add_Lfunction(-x.first,-x.second); rep(i,0,M+1){ auto tmp=C.min_f(i); tmp*=-i; tmp/=2; chmax(ans,tmp+p[M-i]); //cout<<i<<" "<<tmp<<" "<<p[M-i]<<endl; } cout<<ans<<"\n"; }