53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
#include<iostream>
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#include<algorithm>
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#include<string>
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using namespace std;
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char str[100005];
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int n;
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int main()
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{
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while(scanf("%d",&n)==1&&n)
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{
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scanf("%s",str);
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int h=0,t=0;
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for(int i=0;i<n;i++)
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if(str[i]=='H')
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h++;
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else t++;
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if(h%2==0 && t%2==0)
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{
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h/=2;t/=2;
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}
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else
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{
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printf("-1\n");
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continue;
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}
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int hh=0,tt=0;
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for(int i=0;i<n/2;i++)
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if(str[i]=='H')
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hh++;
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else tt++;
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if(hh==h && tt==t)
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{
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printf("1\n%d\n",n/2);
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continue;
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}
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for(int i=n/2,j=0;i<n;i++,j++)
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{
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if(str[i]=='H')
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hh++;
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else tt++;
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if(str[j]=='H')
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hh--;
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else tt--;
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if(hh==h && tt==t)
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{
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printf("2\n%d %d\n",j+1,i+1);
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break;
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}
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}
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}
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return 0;
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}
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