51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
#include<iostream>
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#include<cmath>
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#include<algorithm>
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#define maxn 200+10
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using namespace std;
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class Girl
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{
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public:
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int s,t;
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bool operator <(const class Girl g)
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{
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if(s==g.s)
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return t<g.t;
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return s<g.s;
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}
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};
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Girl girl[maxn];
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int tmp[maxn];
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bool cmp(const int & a,const int & b)
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{
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return a>b;
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}
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int main()
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{
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int n,k,MAXK;
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int sum,ans;
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int i,j,cnt;
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while(scanf("%d%d%d",&n,&k,&MAXK)!=EOF)
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{
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ans=0;
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for(i=0;i<n;i++)
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scanf("%d%d",&girl[i].s,&girl[i].t);
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sort(girl,girl+n);
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for(i=0;i<n;i++)
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{
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tmp[0]=girl[i].t;
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for(j=i+1,cnt=1;j<n;j++)
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if(girl[j].s-girl[i].s<=MAXK)
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tmp[cnt++]=girl[j].t;
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if(cnt<k)
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continue;
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sort(tmp,tmp+cnt,cmp);
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for(sum=j=0;j<cnt&&j<k;j++)
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sum+=tmp[j];
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if(j==k && sum>ans)
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ans=sum;
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}
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printf("%d\n",ans==0?-1:ans);
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}
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}
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