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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#184443 | #7088. Square Graph | yllcm | WA | 35ms | 96080kb | C++14 | 4.7kb | 2023-09-20 19:20:26 | 2023-09-20 19:20:26 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
namespace FastIO {
#define iL (1 << 20)
char ibuf[iL],*iS = ibuf + iL,*iT = ibuf + iL;
#define gc() (iS == iT ? (iT = (iS = ibuf) + fread(ibuf,1,iL,stdin),iS == iT ? EOF : *iS++) : *iS++)
template<typename T>
inline void read(T &a) {
char ch;int sign = 0;
for(ch = gc();!isdigit(ch);ch = gc())
if(ch == '-') sign = 1;
a = ch & 15;
for(ch = gc();isdigit(ch);ch = gc())
a = (a << 3) + (a << 1) + (ch & 15);
if(sign) a = -a;
}
char Out[iL],*iter = Out;
#define flush() fwrite(Out,1,iter - Out,stdout),iter = Out
template<typename T>
inline void write(T x,char end = '\n') {
int c[40],l = 0;if(x < 0) *iter++ = '-',x = -x;
do c[++l] = x % 10,x /= 10; while(x);
while(l) *iter++ = c[l--] + '0';
*iter++ = end;flush();
}
#undef iL
#undef gc
#undef flush
}
using namespace FastIO;
const int N = 3e5 + 5,Lg = 20;
typedef long long ll;
int n;
int a[N],b[N],w[N];
int lg[N];
struct SA {
SA(){}
int v1[N],v2[N];
int sa[N],ton[N];
inline bool cmp(int *r,int i,int j,int k) {
return r[i] == r[j] && (i + k > n ? 0 : r[i + k]) == (j + k > n ? 0 : r[j + k]);
}
inline void Getsa(int *s,int *sa,int n,int m) {
#define For(i,a,b) for(int i = (a);i <= (b);i++)
#define Rof(i,a,b) for(int i = (a);i >= (b);i--)
For(i,1,n) sa[i] = rk[i] = v1[i] = v2[i] = 0;
int *x = v1,*y = v2,*t;
For(i,0,m) ton[i] = 0;
For(i,1,n) ton[x[i] = s[i]]++;
For(i,0,m) ton[i] += ton[i - 1];
Rof(i,n,1) sa[ton[x[i]]--] = i;
for(int j = 1,p;j <= n;j *= 2,m = p) {
p = 0;
For(i,n - j + 1,n) y[++p] = i;
For(i,1,n) if(sa[i] > j) y[++p] = sa[i] - j;
For(i,0,m) ton[i] = 0;
For(i,1,n) ton[x[y[i]]]++;
For(i,1,m) ton[i] += ton[i - 1];
Rof(i,n,1) sa[ton[x[y[i]]]--] = y[i],y[i] = 0;
t = x;x = y;y = t;p = 1;x[sa[1]] = 1;
For(i,2,n)
x[sa[i]] = cmp(y,sa[i - 1],sa[i],j) ? p : (++p);
if(p >= n) break;
}
#undef For
#undef Rof
}
int rk[N],height[N];
inline void GetHeight(int *s,int n) {
s[n + 1] = 0;
for(int i = 1;i <= n;i++) rk[sa[i]] = i;
for(int i = 1,j = 0;i <= n;i++) {
if(j) --j;
if(rk[i] != 1)
while(i + j <= n && sa[rk[i] - 1] + j <= n && s[i + j] == s[sa[rk[i] - 1] + j]) ++j;
height[rk[i]] = j;
}
}
int ST[Lg][N];
inline int LCP(int l,int r) {
if(l < 1 || r < 1 || l > n || r > n) return 0;
l = rk[l];r = rk[r];
if(l > r) swap(l,r);
int t = __lg(r - (++l) + 1);
return max(ST[t][l], ST[t][r - (1 << t) + 1]);
// int res = 1e9;
// for(int i = l + 1;i <= r;i++) res = min(res,height[i]);
// return res;
}
inline void init(int *a,int n) {
for(int i = 1;i <= n;i++) rk[i] = sa[i] = height[i] = 0;
Getsa(a,sa,n,n);
GetHeight(a,n);
for(int i = 1;i <= n;i++) for(int j = 0;j < Lg;j++) ST[j][i] = 0;
for(int i = 1;i <= n;i++) ST[0][i] = height[i];
for(int j = 1;j < Lg;j++)
for(int i = 1;i + (1 << j) - 1 <= n;i++)
ST[j][i] = min(ST[j - 1][i],ST[j - 1][i + (1 << j - 1)]);
}
};
SA A,B;
struct BCJ {
int fa[N];
inline void init(int n) { for(int i = 1;i <= n;i++) fa[i] = i;}
int find(int x) { return fa[x] == x ? x : fa[x] = find(fa[x]);}
inline void Merge(int x,int y) { fa[find(x)] = find(y);}
inline int Same(int x,int y) { return find(x) == find(y);}
}S[Lg],S0;
long long ans;
inline void Union(int x,int y,int dep) { // [x,x + 2^{dep}) , [y,y + 2^{dep})
if(S[dep].Same(x,y)) return;
if(dep == 0) {
if(!S0.Same(x,y)) ans += w[y - x],S0.Merge(x,y);
return;
}
S[dep].Merge(x,y);
Union(x,y,dep - 1);
if(y + (1 << dep - 1) <= n) Union(x + (1 << dep - 1),y + (1 << dep - 1),dep - 1);
}
int srt[N];
inline void Work() {
read(n);
for(int i = 1;i <= n;i++) read(a[i]),b[n - i + 1] = a[i];
for(int i = 1;i <= n / 2;i++) read(w[i]),srt[i] = i;
A.init(a,n);B.init(b,n);
sort(srt + 1,srt + n / 2 + 1,[&](const int &x,const int &y) { return w[x] < w[y];});
S0.init(n);
for(int i = 0;i < Lg;i++) S[i].init(n);
lg[0] = -1;
for(int i = 1;i <= n;i++) lg[i] = lg[i >> 1] + 1;
ans = 0;
// cerr << "OK\n";
for(int _ = 1;_ <= n / 2;_++) {
int len = srt[_];
for(int i = len;i + len <= n;i += len) {
int l = i,r = i + len;
int L = n - (r - 1) + 1,R = n - (l - 1) + 1;
int lcp = A.LCP(l,r);lcp = min(lcp,len);
int lcs = B.LCP(L,R);lcs = min(lcs,len - 1);
if(lcp + lcs >= len) {
int tlen = lcp + lcs - len + 1;
int cl = i - lcs,cr = cl + tlen - 1;
cr = cr + len - 1;
// assert(cr <= n);
int k = lg[cr - cl + 1];
Union(cl,cl + len,k);
Union(cr - (1 << k) + 1,cr - (1 << k) + 1 + len,k);
}
}
}
write(ans);
}
int main() {
int T;read(T);
while(T--) Work();
return 0;
}
/*
1
9
1 2 2 1 2 2 2 2 2
4 1 3 4
*/
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 95784kb
input:
1 8 2 2 5 6 2 5 6 2 5 1 4 4
output:
21
result:
ok "21"
Test #2:
score: -100
Wrong Answer
time: 35ms
memory: 96080kb
input:
3000 41 1 1 2 1 1 2 1 1 2 2 2 1 1 1 2 2 1 2 1 1 2 1 2 2 1 1 1 1 1 2 2 1 1 1 1 2 2 2 1 1 2 37 81 33 27 88 64 13 12 39 94 90 76 5 94 6 10 87 91 7 48 43 2 2 2 2 1 2 2 1 1 1 2 1 1 2 1 1 2 2 1 1 1 1 1 2 2 2 1 2 2 2 1 2 1 1 2 2 1 1 2 1 2 1 1 55 29 4 81 8 90 1 95 94 70 5 3 64 67 70 60 39 59 39 29 99 47 1 2...
output:
1300 820 473 715 657 183 2643 1446 1385 934 3468 1512 808 2199 891 126 1203 292 2108 1379 282 2455 1305 538 2052 673 1984 3870 1314 313 552 1177 2716 1325 1951 551 1847 2888 138 522 3006 731 1308 1155 1206 709 3179 3213 3621 1038 1335 4105 738 1274 1232 636 823 2312 1547 908 579 299 1139 1716 1788 4...
result:
wrong answer 1st words differ - expected: '1169', found: '1300'