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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#332711#7877. Balanced ArrayWRuperDWA 1ms7756kbC++142.1kb2024-02-19 15:50:312024-02-19 15:50:32

Judging History

你现在查看的是最新测评结果

  • [2024-02-19 15:50:32]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:7756kb
  • [2024-02-19 15:50:31]
  • 提交

answer

// Problem:  Balanced Array
// URL: https://vjudge.net/problem/QOJ-7877
// Writer: WRuperD
// Powered by CP Editor (https://cpeditor.org)

#include<bits/stdc++.h>
using namespace std;
const long long inf = 1e18;
const int mininf = 1e9 + 7;
#define int long long
#define pb emplace_back
inline int read(){int x=0,f=1;char ch=getchar();while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}return x*f;}
inline void write(int x){if(x<0){x=~(x-1);putchar('-');}if(x>9)write(x/10);putchar(x%10+'0');}
#define put() putchar(' ')
#define endl puts("")
const int MAX = 2e6 + 10;

inline int fuckyouread(){
	char ch = getchar();
	while(!((ch >= '0' and ch <= '9') or (ch <= 'Z' and ch >= 'A') or (ch <= 'z' and ch >= 'a'))){
		ch = getchar();
	}
	int x = 0;
	while(((ch >= '0' and ch <= '9') or (ch <= 'Z' and ch >= 'A') or (ch <= 'z' and ch >= 'a'))){
		if(ch >= '0' and ch <= '9'){
			x = x * 62 + ch - '0';
		}else if(ch >= 'A' and ch <= 'Z'){
			x = x * 62 + ch - 'A' + 36; 
		}else{
			x = x * 62 + ch - 'a' + 10;
		}
		ch = getchar();
	}
	return x;
}

int a[MAX];

int base = 131, mod = 998244353;
int hsh[MAX];
int pre[MAX];

int gethsh(int l, int r){
	return (hsh[r] - hsh[l - 1] * pre[r - l + 1] % mod) % mod;
}
int mk[MAX];

void solve(){
	int n = read();
	for(int i = 1; i <= n; i++){
		a[i] = fuckyouread();
	}
	pre[0] = 1;
	for(int i = 1; i <= n; i++){
		pre[i] = pre[i - 1] * base % mod;
	}
	for(int i = 1; i <= n; i++){
		hsh[i] = hsh[i - 1] * base % mod + a[i] ;
		hsh[i] %= mod; 
	}
	for(int i = 1; i <= n / 2; i++){
		int l = 2 * i + 1, r = n;
		int ans = l - 1;
		while(l <= r){
			int mid = (l + r) >> 1;
			if(gethsh(1, mid - 2 * i) + gethsh(2 * i + 1, mid) == 2 * gethsh(i + 1, mid - i)){
				l = mid + 1;
				ans = mid;
			}else{
				r = mid - 1;
			}
		}
		if(2 * i + 1 <= ans){
			mk[2 * i + 1]++, mk[ans + 1]--;
		}
	}
	int now = 0;
	for(int i = 1; i <= n; i++){
		now += mk[i];
		if(now){
			putchar('1');
		}else{
			putchar('0');
		}
	}
}

signed main(){
	int t = 1;
	while(t--)	solve();
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 7756kb

input:

3
1 2 3

output:

001

result:

ok single line: '001'

Test #2:

score: 0
Accepted
time: 1ms
memory: 7628kb

input:

9
1 2 3 2 5 4 3 8 5

output:

001010111

result:

ok single line: '001010111'

Test #3:

score: 0
Accepted
time: 0ms
memory: 7628kb

input:

9
1C 3f 4S 3h 88 6x 4W d1 8c

output:

001010111

result:

ok single line: '001010111'

Test #4:

score: -100
Wrong Answer
time: 0ms
memory: 7712kb

input:

49
71FjQ 71FzG 71FjR 71FjG 71FjS 71F3G 71FjT 71ENG 71FjU 71ExG 71FzG 71Fko 71FjW 71FOM 71FPm 71FzG 71FPO 71FP9 71FzG 71Fkc 71FzG 7AXBr 71FPH 8nKLh 71Fk2 71FzG 71FkK 4AGIE 71Fk9 6EfCL 71FPN 71FjJ 71FPb 7H3TC 71Gks 71FzG 71FPI 71FzG 6Oayg 71FPc 71FPw 71FPN 71Fkm 71FPK 71FPK 6Az4J 71FPI 71FzG 71Fke

output:

0000111111001000000000001000000000100000100000001

result:

wrong answer 1st lines differ - expected: '0000111111001000000000001000000000110000100000001', found: '0000111111001000000000001000000000100000100000001'