Bzoj3277：串

题面

传送门

Sol

广义(sam)
每个(sam)的状态开(set)记录属于哪些串
(parent)树上启发式合并(set)

然后每个串就在上面走，通过不停地跳(parent)树的父亲节点保证大于等于(k)，贡献就是(len)

# include <bits/stdc++.h>
# define RG register
# define IL inline
# define Fill(a, b) memset(a, b, sizeof(a))
using namespace std;
typedef long long ll;
 
IL int Input(){
    RG int x = 0, z = 1; RG char c = getchar();
    for(; c < '0' || c > '9'; c = getchar()) z = c == '-' ? -1 : 1;
    for(; c >= '0' && c <= '9'; c = getchar()) x = (x << 1) + (x << 3) + (c ^ 48);
    return x * z;
}
 
const int maxn(1e5 + 5);
const int maxm(5e5 + 5);

int trans[26][maxm], fa[maxm], tot = 1, last, len[maxm];
int id[maxm], t[maxm], n, k, size[maxm];
set <int> ed[maxm];
set <int> :: iterator it;
string s[maxn];

IL void Extend(RG int c){
	RG int p = last, np = ++tot;
	len[last = np] = len[p] + 1;
	while(p && !trans[c][p]) trans[c][p] = np, p = fa[p];
	if(!p) fa[np] = 1;
	else{
		RG int q = trans[c][p];
		if(len[q] == len[p] + 1) fa[np] = q;
		else{
			RG int nq = ++tot;
			fa[nq] = fa[q], len[nq] = len[p] + 1;
			for(RG int i = 0; i < 26; ++i) trans[i][nq] = trans[i][q];
			fa[np] = fa[q] = nq;
			while(p && trans[c][p] == q) trans[c][p] = nq, p = fa[p];
		}
	}
}

int main(RG int argc, RG char *argv[]){
	n = Input(), k = Input();
	for(RG int i = 1; i <= n; ++i){
		cin >> s[i]; last = 1;
		for(RG int j = 0, l = s[i].size(); j < l; ++j) Extend(s[i][j] - 'a');
	}
	for(RG int i = 1; i <= n; ++i)
		for(RG int j = 0, nw = 1, l = s[i].size(); j < l; ++j){
			nw = trans[s[i][j] - 'a'][nw];
			ed[nw].insert(i);
		}
	for(RG int i = 1; i <= tot; ++i) ++t[len[i]];
	for(RG int i = 1; i <= tot; ++i) t[i] += t[i - 1];
	for(RG int i = 1; i <= tot; ++i) id[t[len[i]]--] = i;
	for(RG int i = tot; i; --i){
		RG int x = id[i];
		size[x] = ed[x].size();
		if(size[x] > size[fa[x]]) swap(ed[x], ed[fa[x]]);
		for(it = ed[x].begin(); it != ed[x].end(); ++it)
			ed[fa[x]].insert(*it);
	}
	for(RG int i = 1; i <= n; ++i){
		RG ll ans = 0, nw = 1;
		for(RG int j = 0, l = s[i].size(); j < l; ++j){
			nw = trans[s[i][j] - 'a'][nw];
			while(nw != 1 && size[nw] < k) nw = fa[nw];
			if(size[nw] >= k) ans += len[nw];
		}
		printf("%lld ", ans);
	}
	return 0;
}