Codeforces Round #375 (Div. 2) C
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Description
Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a sequence a1, a2, ..., an, where ai is a band, which performs the i-th song. Polycarp likes bands with the numbers from 1 to m, but he doesn‘t really like others.
We define as bj the number of songs the group j is going to perform tomorrow. Polycarp wants to change the playlist in such a way that the minimum among the numbers b1, b2, ..., bm will be as large as possible.
Find this maximum possible value of the minimum among the bj (1 ≤ j ≤ m), and the minimum number of changes in the playlist Polycarp needs to make to achieve it. One change in the playlist is a replacement of the performer of the i-th song with any other group.
The first line of the input contains two integers n and m (1 ≤ m ≤ n ≤ 2000).
The second line contains n integers a1, a2, ..., an (1 ≤ ai ≤ 109), where ai is the performer of the i-th song.
In the first line print two integers: the maximum possible value of the minimum among the bj (1 ≤ j ≤ m), where bj is the number of songs in the changed playlist performed by the j-th band, and the minimum number of changes in the playlist Polycarp needs to make.
In the second line print the changed playlist.
If there are multiple answers, print any of them.
4 2
1 2 3 2
2 1
1 2 1 2
7 3
1 3 2 2 2 2 1
2 1
1 3 3 2 2 2 1
4 4
1000000000 100 7 1000000000
1 4
1 2 3 4
In the first sample, after Polycarp‘s changes the first band performs two songs (b1 = 2), and the second band also performs two songs (b2 = 2). Thus, the minimum of these values equals to 2. It is impossible to achieve a higher minimum value by any changes in the playlist.
In the second sample, after Polycarp‘s changes the first band performs two songs (b1 = 2), the second band performs three songs (b2 = 3), and the third band also performs two songs (b3 = 2). Thus, the best minimum value is 2.
题意:n首歌曲,ai 表示唱歌的乐队,题目主角喜欢1 2 ..M的乐队,希望歌单全是他们唱的,并且要求唱歌最少的乐队唱的歌的数目也是最小值中最大的(举个列子,5可以分为1 4,2 3,2是最小中的最大值)
解法:当然是平分啦,ans=n/m,那么我们遍历1到M,如果bi乐队(乐队小于M)唱的歌小于ans,从a数组不符合要求的元素(比如ai乐队唱的歌大于ans或者ai乐队大于M)中拿,处理一下拿走的元素就行
#include<stdio.h> //#include<bits/stdc++.h> #include<string.h> #include<iostream> #include<math.h> #include<sstream> #include<set> #include<queue> #include<map> #include<vector> #include<algorithm> #include<limits.h> #define inf 0x3fffffff #define INF 0x3f3f3f3f #define lson l,m,rt<<1 #define rson m+1,r,rt<<1|1 #define LL long long #define ULL unsigned long long using namespace std; int a[100000]; map<int,int>q; int num=0; int main() { int n,m; int ans; cin>>n>>m; ans=n/m; for(int i=0;i<n;i++) { cin>>a[i]; q[a[i]]++; } num=0; for(int i=1;i<=m;i++) { if(q[i]<ans) { while(q[i]<ans) { for(int j=0;j<n;j++) { // cout<<i<<"A"<<endl; if(a[j]>m||q[a[j]]>ans) { // cout<<i<<" "<<a[j]<<endl; q[a[j]]--; q[i]++; a[j]=i; num++; break; } } } } } cout<<ans<<" "<<num<<endl; for(int i=0;i<n;i++) { cout<<a[i]<<" "; } return 0; }
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