学了下BIT，炸了。。。
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#define R(a,b,c) for(register int a = (b); a <= (c); ++ a)
#define nR(a,b,c) for(register int a = (b); a >= (c); -- a)
#define Max(a,b) ((a) > (b) ? (a) : (b))
#define Min(a,b) ((a) < (b) ? (a) : (b))
#define Fill(a,b) memset(a, b, sizeof(a))
#define Abs(a) ((a) < 0 ? -(a) : (a))
#define Swap(a,b) a^=b^=a^=b
#define ll long long
#define ON_DEBUG
#ifdef ON_DEBUG
#define D_e_Line printf("
----------
")
#define D_e(x) cout << #x << " = " << x << endl
#define Pause() system("pause")
#define FileOpen() freopen("in.txt","r",stdin);
#else
#define D_e_Line ;
#define D_e(x) ;
#define Pause() ;
#define FileOpen() ;
#endif
struct ios{
template<typename ATP>ios& operator >> (ATP &x){
x = 0; int f = 1; char c;
for(c = getchar(); c < '0' || c > '9'; c = getchar()) if(c == '-') f = -1;
while(c >= '0' && c <= '9') x = x * 10 + (c ^ '0'), c = getchar();
x*= f;
return *this;
}
}io;
using namespace std;
const int N = 100007;
#define int long long
int n;
int a[N], b[N], f[N];
int t[N];
inline void Updata(int x, int val){
for(; x <= n; x += x & -x) t[x] = Max(t[x], val);
}
inline int Query(int x){
// int s = 2147483648;
int s = 0;
for(; x; x -= x & -x) s = Max(s, t[x]);
return s;
}
#undef int
int main(){
#define int long long
while(~scanf("%lld", &n)){
R(i,1,n){
io >> a[i];
// b[i] = a[i];
}
// sort(b + 1, b + n + 1);
// int len = unique(b + 1, b + n + 1) - b - 1;
// for(register int i = 1; i <= n; i += 3){
// t[i] = 0, t[i + 1] = 0, t[i + 2] = 0;
// }
// int ans = 0;
// R(i,1,n){
// int pos = upper_bound(b + 1, b + len + 1, a[i]) - b;
// f[i] = f[Query(pos)] + 1;
// Updata(pos, f[i]);
// ans = Max(ans, f[i]);
// }
// printf("%lld
", ans);
int len = 1;
b[1] = a[1];
R(i,2,n){
if(a[i] > b[len]) b[++len] = a[i];
else{
*lower_bound(b + 1, b + len + 1, a[i]) = a[i];
}
}
printf("%lld
", len);
}
return 0;
}
HACK lower_bound 和 upper_bound 搞混のCode
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