34 lines
775 B
C++
34 lines
775 B
C++
#include"stdio.h"
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int min(int a,int b)
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{
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return a>b?b:a;
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}
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int main()
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{
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int y1,y2,y3,y4;
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int ans;
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int i;
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int n;
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char str1[55],str2[55];
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while(scanf("%d",&n)!=-1)
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{
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scanf("%s%s",str1,str2);
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y1=0;
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for(i=0;i<n;i++) if(str1[i]!=str2[i]) y1++;
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y2=1;
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for(i=0;i<n;i++) if(str2[i]=='0') y2++;
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y3=1;
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for(i=0;i<n;i++)
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{
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if(str1[i]=='0') str1[i]='1';
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else str1[i]='0';
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}
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for(i=0;i<n;i++) if(str1[i]!=str2[i]) y3++;
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y4=2;
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for(i=0;i<n;i++) if(str2[i]=='1') y4++;
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ans=min(min(min(y1,y2),y3),y4);
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printf("%d\n",ans);
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}
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return 0;
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}
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