31 lines
650 B
C++
31 lines
650 B
C++
#include<stdio.h>
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#include<string.h>
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int a[100008][13];
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int max(int a,int b,int c)
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{
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if(a<b)
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a=b;
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if(a<c)
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a=c;
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return a;
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}
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int main()
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{
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int i,j,n,x,t,fuck;
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while(scanf("%d",&n)==1&&n)
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{
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memset(a,0,sizeof(a));fuck=0;
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for(i=1;i<=n;i++)
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{
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scanf("%d%d",&x,&t);
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if(t>fuck) fuck=t;
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a[t][x+1]++;
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}
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for(i=fuck-1;i>0;i--)
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for(j=1;j<=11;j++)
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a[i][j]+=max(a[i+1][j],a[i+1][j-1],a[i+1][j+1]);
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printf("%d\n",max(a[1][5],a[1][6],a[1][7]));
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}
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return 0;
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}
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