codeforces 351 div2 C. Bear and Colors 暴力
2 seconds
256 megabytes
standard input
standard output
Bear Limak has n colored balls, arranged in one long row. Balls are numbered 1 through n, from left to right. There are n possible colors, also numbered 1 through n. The i-th ball has color ti.
For a fixed interval (set of consecutive elements) of balls we can define a dominant color. It's a color occurring the biggest number of times in the interval. In case of a tie between some colors, the one with the smallest number (index) is chosen as dominant.
There are
non-empty intervals in total. For each color, your task is to count the number of intervals in which this color is dominant.
The first line of the input contains a single integer n (1 ≤ n ≤ 5000) — the number of balls.
The second line contains n integers t1, t2, ..., tn (1 ≤ ti ≤ n) where ti is the color of the i-th ball.
Print n integers. The i-th of them should be equal to the number of intervals where i is a dominant color.
4
1 2 1 2
7 3 0 0
3
1 1 1
6 0 0
In the first sample, color 2 is dominant in three intervals:
- An interval [2, 2] contains one ball. This ball's color is 2 so it's clearly a dominant color.
- An interval [4, 4] contains one ball, with color 2 again.
- An interval [2, 4] contains two balls of color 2 and one ball of color 1.
There are 7 more intervals and color 1 is dominant in all of them.
题意:找出每个区间的重数,将重数的次数输出;
思路:暴力找复杂度o(n*n)
#include<iostream>
#include<cstdio>
#include<cmath>
#include<string>
#include<queue>
#include<algorithm>
#include<stack>
#include<cstring>
#include<vector>
#include<list>
#include<set>
#include<map>
using namespace std;
#define ll long long
#define mod 1000000007
#define inf 999999999
//#pragma comment(linker, "/STACK:102400000,102400000")
int scan()
{
int res = , ch ;
while( !( ( ch = getchar() ) >= '' && ch <= '' ) )
{
if( ch == EOF ) return << ;
}
res = ch - '' ;
while( ( ch = getchar() ) >= '' && ch <= '' )
res = res * + ( ch - '' ) ;
return res ;
}
int a[];
int flag[];
int ans[];
int main()
{
int x,y,z,i,t;
scanf("%d",&x);
for(i=;i<=x;i++)
scanf("%d",&a[i]);
for(i=;i<=x;i++)
{
memset(flag,,sizeof(flag));
int maxx=,ji;
for(t=i;t<=x;t++)
{
//cout<<maxx<<" "<<ji<<" "<<a[t]<<endl;
flag[a[t]]++;
if(flag[a[t]]>maxx)
{
maxx=flag[a[t]];
ji=a[t];
ans[ji]++;
}
else if(flag[a[t]]==maxx&&ji>a[t])
{
ji=a[t];
ans[ji]++;
}
else
ans[ji]++;
}
}
for(i=;i<=x;i++)
printf("%d ",ans[i]);
return ;
}
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