hihocoder#1513 : 小Hi的烦恼 bitset

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目录

• [TOC]

题目链接

hihocoder#1513 : 小Hi的烦恼

题解

cdq 套cdq 套cdq 套cdq就完了呀
对每一科开n个bitset 表示该科目前i个有谁
每次查询都&起来就好了

代码

#include<cstdio> 
#include<bitset> 
#include<cstring> 
#include<algorithm> 
#define LL long long 
#define gc getchar() 
#define pc putchar
inline int read() { 
	int x = 0,f = 1; 
	char c = gc; 
	while(c < '0' || c > '9' )c = gc; 
	while(c <= '9' && c >= '0') x = x * 10 + c - '0',c = gc; 
	return x * f ;
} 
void print(LL x) {
	 if(x >= 10) print(x / 10); 
	 pc(x % 10 + '0'); 
} 
const int maxn = 30007; 
std::bitset<maxn>b[6][maxn]; 
int a[maxn][6]; 
int rk[maxn]; 
int main() { 
	int n = read(); 
	for(int i = 1;i <= n;++ i) 
		for(int j = 1;j <= 5;++ j) { 
			a[i][j] = read();  
		} 
	for(int j = 1;j <= 5;++ j) { 
		for(int i = 1;i <= n;++ i) rk[a[i][j]] = i - 1; 
		for(int i = 1;i <= n;++ i) {
			b[j][i] = b[j][i - 1]; 
			b[j][i].set(rk[i]); 
		} 
	} 
	std::bitset<maxn>ans; 
	for(int i = 1;i <= n;++ i) { 
		ans.set(); 
		for(int j = 1;j <= 5;++ j) ans &= b[j][a[i][j] - 1];
		print(ans.count()); 
		pc('
'); 
	} 
	return 0;
}