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- #include <cstdio>
- int cnt;
- void p(char *c,int n)
- {
- if(n==4)
- {
- for(int i=0; i<4; i++)
- printf("%c",c[i]);
- cnt++;
- printf("\n");
- }
- else
- {
- if(n<2||(n>=2&&(c[n-2]!='P' && c[n-1]=='P') || (c[n-2]=='P' && c[n-1]!='P') || (c[n-2]!='P' && c[n-1]!='P')))
- {
- c[n]='P';
- p(c,n+1);
- }
- if(n<2||(n>=2&&(c[n-2]!='R' && c[n-1]=='R') || (c[n-2]=='R' && c[n-1]!='R') || (c[n-2]!='R' && c[n-1]!='R')))
- {
- c[n]='R';
- p(c,n+1);
- }
- if(n<2||(n>=2&&(c[n-2]!='S' && c[n-1]=='S') || (c[n-2]=='S' && c[n-1]!='S') || (c[n-2]!='S' && c[n-1]!='S')))
- {
- c[n]='S';
- p(c,n+1);
- }
- }
- }
- int main()
- {
- char c[10];
- p(c,0);
- printf(" %d ",cnt);
- return 0;
- }
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