Submission #1070256

#	Time	Username	Problem	Language	Result	Execution time	Memory
1070256		AdamGS	Brperm (RMI20_brperm)	C++17	50 / 100	401 ms	262144 KiB

brperm

#include "brperm.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const ll MOD=694202137, PI=2137;
const int LIM=5e5+7, LG=20;
ll hsh[LIM][LG], hshp[LIM][LG], tmp[LIM][LG], tmp2[LIM][LG], pot[2*LG], n;
void init(int _n, const char s[]) {
	n=_n;
	pot[0]=PI;
	rep(i, 2*LG-1) pot[i+1]=(pot[i]*pot[i])%MOD;
	rep(i, n) hsh[i][0]=hshp[i][0]=s[i];
	for(int i=1; i<LG; ++i) {
		rep(j, n) if(j+(1<<i)<=n) {
			hsh[j][i]=(hsh[j][i-1]+hsh[j+(1<<(i-1))][i-1]*pot[i-1])%MOD;
		}
	}
	rep(i, n) rep(j, LG) tmp[i][j]=s[i];
	for(int i=1; i<LG; ++i) {
		for(int j=0; j<LG-1; ++j) {
			rep(l, n) if(l+(1<<i)<=n) {
				tmp2[l][j]=(tmp[l][j+1]+tmp[l+(1<<(i-1))][j+1]*pot[j])%MOD;
			}
		}
		rep(l, n) hshp[l][i]=tmp2[l][0];
		rep(l, LG) rep(j, n) {
			tmp[j][l]=tmp2[j][l];
			tmp2[j][l]=0;
		}
	}
}
int query(int i, int k) {
	if(i+(1<<k)>n) return 0;
	return hsh[i][k]==hshp[i][k];
}

• Subtask 1: 13 / 13
• Subtask 2: 37 / 37
• Subtask 3: 0 / 17
• Subtask 4: 0 / 33