https://ac.nowcoder.com/acm/contest/322/E

題解：不說了，看代碼。啥東西啊

/* *@Author: STZG *@Language: C++ */ #include <bits/stdc++.h> #include<iostream> #include<algorithm> #include<cstdlib> #include<cstring> #include<cstdio> #include<string> #include<vector> #include<bitset> #include<queue> #include<deque> #include<stack> #include<cmath> #include<list> #include<map> #include<set> //#define DEBUG #define RI register int using namespace std; typedef long long ll; //typedef __int128 lll; const int N=1000000+10; const int MOD=1e9+7; const double PI = acos(-1.0); const double EXP = 1E-8; const int INF = 0x3f3f3f3f; int t,n,m,k,q,ans; int a; char str[N]; void h(){int x=0;int y=0;char d=str[0];int cnt=0;char tmp[N];while(str[x]!='\0'){//cout<<str[x]<<d<<cnt<<endl;if(str[x]==d){x++;cnt++;}else{tmp[y++]='0'+cnt;tmp[y++]=d;d=str[x];x++;cnt=1;}}tmp[y++]='0'+cnt;tmp[y++]=d;tmp[y]='\0';strcpy(str,tmp); } int main() { #ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout); #endifwhile(~scanf("%s",str)){scanf("%d",&n);if(n==1){cout << strlen(str)<<" "<<str << endl;continue;}n--;while(n--){h();}cout << strlen(str)<<" "<<str << endl;}//cout << "Hello world!" << endl;return 0; }

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