37 lines
768 B
C++
37 lines
768 B
C++
#include<stdio.h>
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int main()
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{
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int i,j,n;
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int s[100],e[100];
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while(scanf("%d\n",&n)!=EOF&&n)
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{
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for(i=0;i<n;i++)
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scanf("%d%d",&s[i],&e[i]);
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int k=0,l=0;
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for(i=0;i<n;i++)
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for(j=i+1;j<n;j++)
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{
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if(e[i]>e[j])
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{
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l=s[i];
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s[i]=s[j];
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s[j]=l;
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k=e[i];
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e[i]=e[j];
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e[j]=k;
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}
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}
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int count=0,m=0;
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for(i=0;i<n;i++)
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{
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if(s[i]>=m)
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{
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count++;
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m=e[i];
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}
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}
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printf("%d\n",count);
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}
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return 0;
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}
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