結果
問題 | No.127 門松もどき |
ユーザー |
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提出日時 | 2015-01-14 00:42:37 |
言語 | C++11 (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 113 ms / 5,000 ms |
コード長 | 2,508 bytes |
コンパイル時間 | 1,571 ms |
コンパイル使用メモリ | 160,440 KB |
実行使用メモリ | 76,928 KB |
最終ジャッジ日時 | 2024-12-23 21:50:22 |
合計ジャッジ時間 | 3,657 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 23 |
ソースコード
#include<bits/stdc++.h>using namespace std;#define REP(i,a,b) for(i=a;i<b;i++)#define rep(i,n) REP(i,0,n)#define mygc(c) (c)=getchar_unlocked()#define mypc(c) putchar_unlocked(c)#define ll long long#define ull unsigned llvoid reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}void reader(ll *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}int reader(char c[]){int i,s=0;for(;;){mygc(i);if(i!=' '&&i!='\n'&&i!='\r'&&i!='\t'&&i!=EOF) break;}c[s++]=i;for(;;){mygc(i);if(i==' '||i=='\n'||i=='\r'||i=='\t'||i==EOF) break;c[s++]=i;}c[s]='\0';return s;}template <class T, class S> void reader(T *x, S *y){reader(x);reader(y);}template <class T, class S, class U> void reader(T *x, S *y, U *z){reader(x);reader(y);reader(z);}template <class T, class S, class U, class V> void reader(T *x, S *y, U *z, V *w){reader(x);reader(y);reader(z);reader(w);}void writer(int x, char c){int s=0,m=0;char f[10];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}void writer(ll x, char c){int s=0,m=0;char f[20];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}void writer(const char c[]){int i;for(i=0;c[i]!='\0';i++)mypc(c[i]);}void writer(const char x[], char c){int i;for(i=0;x[i]!='\0';i++)mypc(x[i]);mypc(c);}template<class T> void writerLn(T x){writer(x,'\n');}template<class T, class S> void writerLn(T x, S y){writer(x,' ');writer(y,'\n');}template<class T, class S, class U> void writerLn(T x, S y, U z){writer(x,' ');writer(y,' ');writer(z,'\n');}template<class T> void writerArr(T x[], int n){int i;if(!n){mypc('\n');return;}rep(i,n-1)writer(x[i],' ');writer(x[n-1],'\n');}int N, A[4000];int dp1[3100][3100], dp2[3100][3100];int main(){int i, j, k, len;int res = 0;reader(&N);rep(i,N) reader(A+i);rep(len,N){rep(i,N-len){j = i + len;if(len==0){ dp1[i][j] = dp2[i][j] = 1; continue; }dp1[i][j] = dp1[i][j-1];dp2[i][j] = dp2[i+1][j];if(A[i] < A[j]) dp1[i][j] = max(dp1[i][j], dp2[i+1][j]+1);if(A[i] > A[j]) dp2[i][j] = max(dp2[i][j], dp1[i][j-1]+1);}}res = 0;rep(i,N) rep(j,N) res = max(res, max(dp1[i][j],dp2[i][j]));writerLn(res);return 0;}