結果
問題 | No.921 ずんだアロー |
ユーザー | hotman78 |
提出日時 | 2023-03-09 16:43:30 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 9 ms / 2,000 ms |
コード長 | 9,418 bytes |
コンパイル時間 | 3,341 ms |
コンパイル使用メモリ | 228,208 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-18 02:54:05 |
合計ジャッジ時間 | 4,122 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge6 |
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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 | AC | 1 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 9 ms
5,376 KB |
testcase_11 | AC | 9 ms
5,376 KB |
testcase_12 | AC | 3 ms
5,376 KB |
testcase_13 | AC | 7 ms
5,376 KB |
testcase_14 | AC | 7 ms
5,376 KB |
testcase_15 | AC | 5 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 8 ms
5,376 KB |
testcase_18 | AC | 9 ms
5,376 KB |
testcase_19 | AC | 9 ms
5,376 KB |
testcase_20 | AC | 9 ms
5,376 KB |
testcase_21 | AC | 9 ms
5,376 KB |
testcase_22 | AC | 9 ms
5,376 KB |
testcase_23 | AC | 8 ms
5,376 KB |
testcase_24 | AC | 9 ms
5,376 KB |
ソースコード
#line 2 "cpplib/util/template.hpp" #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #pragma GCC target("avx2") #include<bits/stdc++.h> using namespace std; #line 1 "cpplib/util/ioutil.hpp" // template <class Head,class... Args> // std::ostream& output(std::ostream& out,const Head& head,const Args&... args){ // out>>head; // return output(head,args...); // } // template <class Head> // std::ostream& output(std::ostream& out,const Head& head){ // out>>head; // return out; // } template<typename T,typename E> std::ostream& operator<<(std::ostream& out,std::pair<T,E>v){ out<<"("<<v.first<<","<<v.second<<")";return out; } // template <class... Args> // ostream& operator<<(ostream& out,std::tuple<Args...>v){ // std::apply(output,v); // return out; // } #line 8 "cpplib/util/template.hpp" struct __INIT__{__INIT__(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}}__INIT__; typedef long long lint; constexpr long long INF=1LL<<60; constexpr int IINF=1<<30; constexpr double EPS=1e-10; #define endl '\n'; typedef vector<lint> vec; typedef vector<vector<lint>> mat; typedef vector<vector<vector<lint>>> mat3; typedef vector<string> svec; typedef vector<vector<string>> smat; template<typename T>using V=vector<T>; template<typename T>using VV=V<V<T>>; template<typename T>inline void output(T t){bool f=0;for(auto i:t){cout<<(f?" ":"")<<i;f=1;}cout<<endl;} template<typename T>inline void output2(T t){for(auto i:t)output(i);} template<typename T>inline void debug(T t){bool f=0;for(auto i:t){cerr<<(f?" ":"")<<i;f=1;}cerr<<endl;} template<typename T>inline void debug2(T t){for(auto i:t)debug(i);} #define loop(n) for(long long _=0;_<(long long)(n);++_) #define _overload4(_1,_2,_3,_4,name,...) name #define __rep(i,a) repi(i,0,a,1) #define _rep(i,a,b) repi(i,a,b,1) #define repi(i,a,b,c) for(long long i=(long long)(a);i<(long long)(b);i+=c) #define rep(...) _overload4(__VA_ARGS__,repi,_rep,__rep)(__VA_ARGS__) #define _overload3_rev(_1,_2,_3,name,...) name #define _rep_rev(i,a) repi_rev(i,0,a) #define repi_rev(i,a,b) for(long long i=(long long)(b)-1;i>=(long long)(a);--i) #define rrep(...) _overload3_rev(__VA_ARGS__,repi_rev,_rep_rev)(__VA_ARGS__) #define all(n) begin(n),end(n) template<typename T,typename E>bool chmin(T& s,const E& t){bool res=s>t;s=min<T>(s,t);return res;} template<typename T,typename E>bool chmax(T& s,const E& t){bool res=s<t;s=max<T>(s,t);return res;} const vector<lint> dx={1,0,-1,0,1,1,-1,-1}; const vector<lint> dy={0,1,0,-1,1,-1,1,-1}; #define SUM(v) accumulate(all(v),0LL) #if __cplusplus>=201703L template<typename T,typename ...Args>auto make_vector(T x,int arg,Args ...args){if constexpr(sizeof...(args)==0)return vector<T>(arg,x);else return vector(arg,make_vector<T>(x,args...));} #endif #define extrep(v,...) for(auto v:__MAKE_MAT__({__VA_ARGS__})) #define bit(n,a) ((n>>a)&1) vector<vector<long long>> __MAKE_MAT__(vector<long long> v){if(v.empty())return vector<vector<long long>>(1,vector<long long>());long long n=v.back();v.pop_back();vector<vector<long long>> ret;vector<vector<long long>> tmp=__MAKE_MAT__(v);for(auto e:tmp)for(long long i=0;i<n;++i){ret.push_back(e);ret.back().push_back(i);}return ret;} using graph=vector<vector<int>>; template<typename T>using graph_w=vector<vector<pair<int,T>>>; #if __cplusplus>=201703L constexpr inline long long powll(long long a,long long b){long long res=1;while(b--)res*=a;return res;} #endif template<typename T,typename E>pair<T,E>& operator+=(pair<T,E>&s,const pair<T,E>&t){s.first+=t.first;s.second+=t.second;return s;} template<typename T,typename E>pair<T,E>& operator-=(pair<T,E>&s,const pair<T,E>&t){s.first-=t.first;s.second-=t.second;return s;} template<typename T,typename E>pair<T,E> operator+(const pair<T,E>&s,const pair<T,E>&t){auto res=s;return res+=t;} template<typename T,typename E>pair<T,E> operator-(const pair<T,E>&s,const pair<T,E>&t){auto res=s;return res-=t;} #define BEGIN_STACK_EXTEND(size) void * stack_extend_memory_ = malloc(size);void * stack_extend_origin_memory_;char * stack_extend_dummy_memory_ = (char*)alloca((1+(int)(((long long)stack_extend_memory_)&127))*16);*stack_extend_dummy_memory_ = 0;asm volatile("mov %%rsp, %%rbx\nmov %%rax, %%rsp":"=b"(stack_extend_origin_memory_):"a"((char*)stack_extend_memory_+(size)-1024)); #define END_STACK_EXTEND asm volatile("mov %%rax, %%rsp"::"a"(stack_extend_origin_memory_));free(stack_extend_memory_); #line 2 "main.cpp" template<typename T> class AVL_set{ struct node; using np=node*; struct node{ T val; int cnt=1; int dep=0; np ch[2]={nullptr,nullptr}; node(T val):val(val){} }; np root=nullptr; inline int count(np t){return t?t->cnt:0;} inline int depth(np t){return t?t->dep:0;} inline np update(np& t,bool f=1){ if(!t)return t; t->cnt=count(t->ch[0])+1+count(t->ch[1]); t->dep=max(depth(t->ch[0]),depth(t->ch[1]))+1; if(f&&abs(depth(t->ch[0])-depth(t->ch[1]))==2){ rebuild(t,depth(t->ch[0])<depth(t->ch[1])); } return t; } public: AVL_set(){} inline void insert(T val){insert(val,root);} inline void erase(T val){erase(val,root);} inline int lower_bound(T val){return lower_bound(val,root);} inline int upper_bound(T val){return upper_bound(val,root);} inline int size(){return count(root);} inline T find_by_order(int idx){assert(0<=idx&&idx<size());return find_by_order(idx,root);} inline T operator[](int idx){return find_by_order(idx);} private: void insert(T val,np& t){ if(!t)t=new node(val); else if(val==t->val)return; else if(val<t->val)insert(val,t->ch[0]); else if(val>t->val)insert(val,t->ch[1]); update(t); } void erase(T val,np& t){ if(!t)return; else if(val==t->val){ if(!t->ch[0]||!t->ch[1])t=t->ch[0]?t->ch[0]:t->ch[1]; else move_down(t->ch[0],t); } else if(val<t->val)erase(val,t->ch[0]); else if(val>t->val)erase(val,t->ch[1]); update(t); } void move_down(np& t,np& p){ if(t->ch[1])move_down(t->ch[1],p); else p->val=t->val,t=t->ch[0]; update(t); } int lower_bound(T val,np t){ if(!t)return 0; if(val==t->val)return count(t->ch[0]); if(val<t->val)return lower_bound(val,t->ch[0]); else return count(t->ch[0])+1+lower_bound(val,t->ch[1]); } int upper_bound(T val,np t){ if(!t)return 0; if(val<t->val)return upper_bound(val,t->ch[0]); else return count(t->ch[0])+1+upper_bound(val,t->ch[1]); } T find_by_order(int idx,np t){ if(idx==count(t->ch[0]))return t->val; else if(idx<count(t->ch[0]))return find_by_order(idx,t->ch[0]); else return find_by_order(idx-count(t->ch[0])-1,t->ch[1]); } np rot(np t){ int b=depth(t->ch[0])<depth(t->ch[1]); if(depth(t->ch[0])==depth(t->ch[1]))return t; np s=t->ch[b]; t->ch[b]=s->ch[1-b]; s->ch[1-b]=t; update(t,0);update(s,0); return s; } void rebuild(np& t,int b){ if(t->ch[b]&&depth(t->ch[b]->ch[b])<depth(t->ch[b]->ch[1-b])){ t->ch[b]=rot(t->ch[b]); } t=rot(update(t,0)); } }; int main(){ lint n; cin>>n; vec a(n); rep(i,n)cin>>a[i]; lint ans=0; bool now=1; rep(i,n-1){ ans+=now; if(now&&a[i]!=a[i+1]){ now=0; }else{ now=1; } } ans+=now; cout<<ans<<endl; } // int main(){ // int n,k; // cin>>n>>k; // vec v(n); // rep(i,n)cin>>v[i]; // sort(all(v)); // auto get=[&](int to,int from){ // return (to-from)*v[to-1]; // }; // cout<<alien_dp<lint,decltype(get)>(n, k,INF, get)<<endl; // } // map<lint,lint> table(lint n){ // lint l = 1,r; // map<lint,lint>res; // res[1]=n; // while(l <= n){ // r = n / (n / l) + 1; // res[r]=n/r-n/l; // l = r; // } // return res; // } // map<lint,lint> merge(map<lint,lint>s,map<lint,lint>t){ // map<lint,lint>res; // for(auto [p,q]:s)res[p]+=q; // for(auto [p,q]:t)res[p]-=q; // lint pre=0; // for(auto [p,q]:res){ // res[p]+=pre; // pre=res[p]; // } // return res; // } // map<lint,mint>get_mebius(lint n){ // Dirichlet<mint>::resize(n); // auto dir=Dirichlet<mint>::mebius(); // vector<mint>suma=dir.a; // rep(i,suma.size()-1)suma[i+1]+=suma[i]; // auto get=[&](long long k){return (k<=Dirichlet<mint>::K?suma[k]:dir.A[n/k]);}; // lint l = 1,r; // map<lint,mint>res; // // debug(suma); // res[1]=get(1); // while(l <= n){ // r = n / (n / l) + 1; // res[r]=get(r); // l = r; // } // return res; // } // map<lint,mint> merge2(map<lint,mint>s,map<lint,mint>t){ // map<lint,mint>res; // for(auto [p,q]:s)res[p]=q; // for(auto [p,q]:t)res[p]=q; // return res; // } // void solve(){ // lint l,r; // cin>>l>>r; // vec v(r+1); // auto tb=merge(table(r),table(l-1)); // lint pre=0; // lint preq=0; // auto res=merge2(get_mebius(r),l!=1?get_mebius(l-1):map<lint,mint>()); // mint ans=0; // for(auto [p,q]:tb){ // // cerr<<p<<" "<<q<<endl; // cerr<<p<<" "<<q<<" "<<res[p]<<endl; // ans+=mint(2).pow(preq)*(res[pre]-res[p]); // pre=p; // preq=q; // } // cout<<ans<<endl; // } // int main(){ // solve(); // } // int main(){ // lint t; // cin>>t; // while(t--)solve(); // }