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  1. #include<bits/stdc++.h>
  2. #define all(v) (v).begin(),(v).end()
  3. #define pb push_back
  4. #define ppb pop_back
  5. #define mp make_pair
  6. #define ri(x) scanf("%d",&(x))
  7. #define ri2(x,y) scanf("%d %d",&(x),&(y))
  8. #define ri3(x,y,z) scanf("%d %d %d",&(x),&(y),&(z))
  9. #define rll(x) scanf("%lld",&(x))
  10. #define rll2(x,y) scanf("%lld %lld",&(x),&(y))
  11. #define rll3(x,y,z) scanf("%lld %lld %lld",&(x),&(y),&(z))
  12. #define gc(x) ((x) = getchar())
  13. using namespace::std;
  14.  
  15. const long double PI = acos(-1);
  16. const long long MOD = 1000000000 +7;
  17.  
  18. typedef long long ll;
  19. typedef pair<ll,ll> pll;
  20. typedef pair<ll,pll> tll;
  21. typedef pair<int,int> ii;
  22. typedef pair<int,ii> iii;
  23. typedef vector<int> vi;
  24. typedef vector<ii> vii;
  25. typedef vector<iii> viii;
  26. typedef vector<ll> vll;
  27. typedef vector<pll> vpll;
  28. typedef vector<tll> vtll;
  29. typedef vector<string> vs;
  30. typedef set<int> si;
  31. typedef set<ii> sii;
  32. typedef set<iii> siii;
  33.  
  34. ll gcd(ll a, ll b){ return b==0?a:gcd(b,a%b);}
  35.  
  36. ll add(ll a, ll b, ll m = MOD){
  37. if(a >= m) a %= m;
  38. if(b >= m) b %= m;
  39. if(a < 0) a += m;
  40. if(b < 0) b += m;
  41. ll res = a+b;
  42. if(res >= m or res <= -m) res %= m;
  43. if(res < 0) res += m;
  44. return res;
  45. }
  46.  
  47. ll mul(ll a, ll b, ll m = MOD){
  48. if(a >= m) a %= m;
  49. if(b >= m) b %= m;
  50. if(a < 0) a += m;
  51. if(b < 0) b += m;
  52. ll res = a*b;
  53. if(res >= m or res <= -m) res %= m;
  54. if(res < 0) res += m;
  55. return res;
  56. }
  57.  
  58. ll pow_mod(ll a, ll b, ll m = MOD){
  59. ll res = 1LL;
  60. a = a%m;
  61. while(b){
  62. if(b&1) res = mul(res,a,m);
  63. b >>= 1;
  64. a = mul(a,a,m);
  65. }
  66. return res;
  67. }
  68.  
  69. ll fastexp(ll a, ll b){
  70. ll res = 1LL;
  71. while(b){
  72. if(b&1) res = res*a;
  73. b >>= 1;
  74. a *= a;
  75. }
  76. return res;
  77. }
  78.  
  79. int gcdExtendido(int a, int b, int *x, int *y){
  80. if(a == 0){
  81. *x = 0;
  82. *y = 1;
  83. return b;
  84. }
  85. int x1, y1;
  86. int gcd = gcdExtendido(b%a,a,&x1,&y1);
  87.  
  88. *x = y1-(b/a)*x1;
  89. *y = x1;
  90. return gcd;
  91. }
  92.  
  93. int modInverso(int a, int m){
  94. int x, y;
  95. int g = gcdExtendido(a,m,&x,&y);
  96. if(g!=1) return -1;
  97. else return (x%m + m)%m;
  98. }
  99.  
  100. /****************************************
  101. *************P*L*A*N*T*I*L*L*A************
  102. *****************************************/
  103.  
  104. const int N = 4000+5;
  105. const int E = 26;
  106.  
  107. int n;
  108. int l;
  109. char a[N];
  110. char v[N];
  111. // Trie memory
  112. int h[N];
  113. int edges;
  114. int ch[N];
  115. int to[N];
  116. int nodes;
  117. int nxt[N];
  118. bool pat[N];
  119. int last[N];
  120. int closest[N];
  121. // DP memory
  122. int memo[N][N][2];
  123.  
  124. void addNode(){
  125. pat[nodes] = false;
  126. last[nodes] = -1;
  127. nodes += 1;
  128. }
  129.  
  130. void addEdge(int u, int v, int c){
  131. ch[edges] = c;
  132. to[edges] = v;
  133. nxt[edges] = last[u];
  134. last[u] = edges;
  135. edges += 1;
  136. }
  137.  
  138. int find(int u, int label){
  139. for(int e = last[u]; e != -1; e = nxt[e]){
  140. if(ch[e] == label) return e;
  141. }
  142. return -1;
  143. }
  144.  
  145. void insert(int npat){
  146. int pos = 0;
  147. for(int i = 0; v[i] ; i++){
  148. int nxt = v[i] - 'A';
  149. if(find(pos, nxt) == -1){
  150. h[nodes] = h[pos] + 1;
  151. addEdge(pos, nodes, nxt);
  152. addNode();
  153. }
  154. pos = to[find(pos, nxt)];
  155. }
  156. pat[pos] = true;
  157. }
  158.  
  159. void DFS(int u){
  160. closest[u] = pat[u]? 0 : 1e9;
  161. for(int e = last[u]; e != -1; e = nxt[e]){
  162. int v = to[e];
  163. DFS(v);
  164. if(closest[v] + 1 < closest[u]){
  165. closest[u] = closest[v] + 1;
  166. }
  167. }
  168. }
  169.  
  170. int solve(){
  171. DFS(0);
  172. n = strlen(a);
  173. vector<int> p(nodes);
  174. iota(all(p), 0);
  175. sort(all(p), [&] (int i, int j){
  176. return h[i] > h[j];
  177. });
  178. for(int stay = 0; stay < 2; stay++){
  179. for(int state = 0; state < nodes; state++){
  180. memo[n][state][stay] = state? closest[state] : 0;
  181. }
  182. }
  183. for(int pos = n - 1; pos >= 0; pos--){ // Posicion en a
  184. for(int stay = 0; stay < 2; stay++){ // Si puedo regresar a la raiz o no
  185. for(int state : p){ // Estado del trie
  186. int ans = 1e9;
  187. for(int e = last[state], cand; e != -1; e = nxt[e]){
  188. // Reemplazar a[pos]
  189. cand = (ch[e] + 'A' != a[pos]) + memo[pos + 1][to[e]][1];
  190. if(ans > cand) ans = cand;
  191. // Borrar la letra ch[e] y avanzar al siguiente estado de todas formas
  192. cand = 1 + memo[pos][to[e]][0];
  193. if(ans > cand) ans = cand;
  194. }
  195. // Reiniciar el string
  196. if(stay) ans = min(ans, closest[state] + memo[pos][0][0]);
  197. // Borrar a[pos]
  198. ans = min(ans, 1 + memo[pos + 1][state][1]);
  199. memo[pos][state][stay] = ans;
  200. }
  201. }
  202. }
  203. return memo[0][0][1];
  204. }
  205.  
  206. int main(){
  207. int t;
  208. ri(t);
  209. while(t--){
  210. ri(l);
  211. nodes = edges = 0;
  212. addNode();
  213. for(int i = 1; i <= l; i++){
  214. scanf("%s", v);
  215. insert(i);
  216. }
  217. scanf("%s", a);
  218. printf("%d\n", solve());
  219. }
  220. return 0;
  221. }
  222.  
Success #stdin #stdout 0s 4484KB
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