Codeforces 56D Changing a String (DP) 题意:你可以对字符串s进行3种操作: 1,在pos位置插入字符ch。 2,删除pos位置的字符。 3,替换pos位置的字符为ch。 问最少需要多少次操作可以把字符s变成字符s1? 思路: 设dp[i][j]为字符串s的前i个字符替换成s1的前j个字符的最小花费。则有三种转移: 1:dp[i ...
}else{ dfs(n-1,m-1);if(a[n]!=b[m]) printf("REPLACE %d %c\n",m,b[m]); } }intmain(){ scanf("%s",a+1);n=strlen(a+1); scanf("%s",b+1);m=strlen(b+1);for(inti=0;i<=n;i++)for(intj=0;j<=m;j++) f[i][j]=0; f[0][0]=0;for(inti=1;i<=n;i++) ...
DELETEpos— delete a character numberpos(1 ≤ pos ≤ |s|) from the strings. At that the letters shift together and the length of the string decreases by 1. REPLACEposch— the letter in the positionposof the linesis replaced bych(1 ≤ pos ≤ |s|, A ≤ ch...
void dfs(int a, int b){ if(a == 0 && b==0)return ; if(s[a] == t[b] && dp[a-1][b-1] == dp[a][b]) dfs(a-1, b-1); else { if(a && dp[a-1][b] +1 == dp[a][b]) { P = node(1, a); P.put(); dfs(a-1, b); } else if(b && dp[a][b-1] ...
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importjava.util.HashMap;importjava.util.Scanner;publicclassB501{publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);int t=sc.nextInt();HashMap<String,String>map=newHashMap<>();while(t-->0){String a=sc.next();String b=sc.next();if(map.containsKey(a)){map.put(b,map...
Misha hacked the Codeforces site. Then he decided to let all the users change their handles. A user can now change his handle any number of times. But each new handle must not be equal to any handle that is already used or that was used at some point. ...
Codeforces 56D Changing a String 2016-07-13 18:39 − ... GFY 0 223 相关推荐 @codeforces - 715E@ Complete the Permutations 2019-12-11 09:54 − [toc] --- ## @description@ 给定两个排列 p, q,他们中的有些位置被替换成了 0。 两个排列 p, q 的距离为:最少需要在 p 中执行交换...
#include<string.h> using namespace std; #define ll int #define N 1010 char s[N], t[N]; int dp[N][N], n, m; // 0为插入 1为删除 2 3为替换 struct node{ int op; int pos; char c; node(int A=0,int E=0,char D=0):op(A),pos(E), c(D){} ...
ILoveCodeforces MikeMirzayanov Petya Ivanov Output 3 Petya Ivanov Misha MikeMirzayanov Vasya VasyaPetrov123 1#include <iostream>2#include <string>3#include <queue>4#include <map>5#include <set>6#include <algorithm>7usingnamespacestd;8map<string,string>ma;9set<string>se;10queue<string>que;11in...