https://codeforces.com/contest/1105/problem/B

題解：

/* *@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=200000+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; int ans,cnt,flag,temp; int a[N]; char str[N]; int main() { #ifdef DEBUGfreopen("input.in", "r", stdin);//freopen("output.out", "w", stdout); #endifscanf("%d%d",&n,&k);//scanf("%d",&t);//while(t--){}scanf("%s",str);cnt=1;for(int i=0;i<n;i++){if(str[i]==str[i+1]){cnt++;}else{a[str[i]-'a']+=cnt/k;ans=max(ans,a[str[i]-'a']);cnt=1;}}cout<<ans<<endl;//cout << "Hello world!" << endl;return 0; }

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