結果
問題 | No.284 門松と魔法(2) |
ユーザー | rickytheta |
提出日時 | 2016-12-23 11:43:40 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 765 ms / 5,000 ms |
コード長 | 5,448 bytes |
コンパイル時間 | 1,782 ms |
コンパイル使用メモリ | 184,252 KB |
実行使用メモリ | 20,756 KB |
最終ジャッジ日時 | 2024-05-08 11:38:31 |
合計ジャッジ時間 | 7,495 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 2 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 1 ms
6,944 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 1 ms
6,944 KB |
testcase_07 | AC | 2 ms
6,940 KB |
testcase_08 | AC | 1 ms
6,944 KB |
testcase_09 | AC | 1 ms
6,944 KB |
testcase_10 | AC | 3 ms
6,944 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 2 ms
6,944 KB |
testcase_14 | AC | 2 ms
6,944 KB |
testcase_15 | AC | 2 ms
6,944 KB |
testcase_16 | AC | 2 ms
6,944 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,944 KB |
testcase_19 | AC | 1 ms
6,944 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 3 ms
6,940 KB |
testcase_23 | AC | 33 ms
6,940 KB |
testcase_24 | AC | 483 ms
15,800 KB |
testcase_25 | AC | 188 ms
9,800 KB |
testcase_26 | AC | 2 ms
6,944 KB |
testcase_27 | AC | 1 ms
6,940 KB |
testcase_28 | AC | 2 ms
6,944 KB |
testcase_29 | AC | 708 ms
18,056 KB |
testcase_30 | AC | 563 ms
17,568 KB |
testcase_31 | AC | 379 ms
16,000 KB |
testcase_32 | AC | 765 ms
20,304 KB |
testcase_33 | AC | 286 ms
20,652 KB |
testcase_34 | AC | 464 ms
20,756 KB |
testcase_35 | AC | 2 ms
6,944 KB |
testcase_36 | AC | 1 ms
6,940 KB |
testcase_37 | AC | 413 ms
16,184 KB |
testcase_38 | AC | 283 ms
15,896 KB |
testcase_39 | AC | 6 ms
6,940 KB |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:121:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 121 | scanf("%d",&n); | ~~~~~^~~~~~~~~ main.cpp:122:16: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 122 | REP(i,n)scanf("%d",a+i); | ~~~~~^~~~~~~~~~
ソースコード
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef vector<int> vi; typedef vector<ll> vl; typedef pair<int,int> pii; typedef pair<ll,ll> pll; typedef ll _loop_int; #define REP(i,n) for(_loop_int i=0;i<(_loop_int)(n);++i) #define FOR(i,a,b) for(_loop_int i=(_loop_int)(a);i<(_loop_int)(b);++i) #define FORR(i,a,b) for(_loop_int i=(_loop_int)(b)-1;i>=(_loop_int)(a);--i) #define DEBUG(x) cout<<#x<<": "<<x<<endl #define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl #define ALL(a) (a).begin(),(a).end() #define CHMIN(a,b) a=min((a),(b)) #define CHMAX(a,b) a=max((a),(b)) // mod const ll MOD = 1000000007ll; #define FIX(a) ((a)%MOD+MOD)%MOD // floating typedef double Real; const Real EPS = 1e-11; #define EQ0(x) (abs(x)<EPS) #define EQ(a,b) (abs(a-b)<EPS) typedef complex<Real> P; struct obj{ int len,bef2,bef; obj(){ len=0; bef2=bef=-1; } obj(int len,int bef2,int bef):len(len),bef2(bef2),bef(bef){} bool operator<(const obj &that) const{ return len < that.len; } void debug(){ printf("[%d,%d,%d]",len,bef2,bef); } }; struct node{ obj best[2]; node(){} node merge(const node &that) const{ node ret; ret.best[0] = max(best[0], that.best[0]); ret.best[1] = obj(-2521,-1,-1); if(ret.best[0].bef2 != best[0].bef2)CHMAX(ret.best[1],best[0]); if(ret.best[0].bef2 != best[1].bef2)CHMAX(ret.best[1],best[1]); if(ret.best[0].bef2 != that.best[0].bef2)CHMAX(ret.best[1],that.best[0]); if(ret.best[0].bef2 != that.best[1].bef2)CHMAX(ret.best[1],that.best[1]); return ret; } void debug(){ best[0].debug(); printf(", "); best[1].debug(); printf("\n"); } }; struct segment{ int n; vector<node> data; segment(int n_){ n=1; while(n<n_)n<<=1; data.resize(2*n-1); REP(i,n){ data[i+n-1]=node(); data[i+n-1].best[0].bef = i; data[i+n-1].best[1].bef = i; } FORR(i,0,n-1)data[i]=data[2*i+1].merge(data[2*i+2]); } void set(int x,node v){ x += n-1; data[x] = v; while(x>0){ x = (x-1)/2; data[x] = data[2*x+1].merge(data[2*x+2]); } } node get(int x){ return data[x+n-1]; } node query(int l,int r,int a,int b,int k){ if(r<=a || b<=l)return node(); if(l<=a && b<=r){ return data[k]; }else{ int m = (a+b)/2; node lef = query(l,r,a,m,2*k+1); node rig = query(l,r,m,b,2*k+2); return lef.merge(rig); } } node query(int l,int r){ return query(l,r,0,n,0); } }; obj succ(const obj &o,int v){ if(o.bef2==v){ return obj(-2521,-1,-1); }else{ return obj(o.len+1, o.bef, v); } } int n; int a[125252]; int main(){ scanf("%d",&n); REP(i,n)scanf("%d",a+i); // kowai node zaatu { map<int,int> M; REP(i,n)M[a[i]]=0; int it = 1; for(pair<int,int> P:M){ M[P.first] = it++; } REP(i,n)a[i]=M[a[i]]; } segment up(n+10),down(n+10); int ans = 0; REP(i,n){ int v = a[i]; node nxtdown = down.get(v), nxtup = up.get(v); { vector<obj> yo; yo.push_back(nxtdown.best[0]); yo.push_back(nxtdown.best[1]); node q = up.query(v+1,n+5); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); int split_a = q.best[0].bef; int split_b = q.best[1].bef; if(v<split_a){ q = up.query(v+1,split_a); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); q = up.query(split_a+1,n+5); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); } if(v<split_b){ q = up.query(v+1,split_b); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); q = up.query(split_b+1,n+5); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); } sort(ALL(yo)); reverse(ALL(yo)); int x=-2; REP(j,yo.size()){ if(yo[j].bef2 != v){ if(x==-2){ nxtdown.best[0] = yo[j]; x = yo[j].bef2; }else if(x != yo[j].bef2){ nxtdown.best[1] = yo[j]; break; } } } } { vector<obj> yo; yo.push_back(nxtup.best[0]); yo.push_back(nxtup.best[1]); node q = down.query(0,v); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); int split_a = q.best[0].bef; int split_b = q.best[1].bef; if(split_a<v){ q = down.query(0,split_a); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); q = down.query(split_a+1,v); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); } if(split_b<v){ q = down.query(0,split_b); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); q = down.query(split_b+1,v); yo.push_back(succ(q.best[0],v)); yo.push_back(succ(q.best[1],v)); } sort(ALL(yo)); reverse(ALL(yo)); int x=-2; REP(j,yo.size()){ if(yo[j].bef2 != v){ if(x==-2){ nxtup.best[0] = yo[j]; x = yo[j].bef2; }else if(x != yo[j].bef2){ nxtup.best[1] = yo[j]; break; } } } } up.set(v,nxtup); down.set(v,nxtdown); // nxtup.debug(); // nxtdown.debug(); CHMAX(ans,nxtup.best[0].len); CHMAX(ans,nxtdown.best[0].len); } if(ans<3)ans=0; printf("%d\n",ans); return 0; }