48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <vector>
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#include <algorithm>
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using namespace std;
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int nn,num;
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int main(){
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char str[100];
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int i;
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while(~scanf("%s",str)){
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nn = 0;
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bool flag = true;
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int len = strlen(str);
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char tmp,a = 0,b = 0,c = 0;
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tmp = str[0];
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a = tmp;
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for(i =0;i < len;i++){
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if(tmp==str[i]){
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nn++;
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}
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else {
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tmp = str[i];
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b = tmp;
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break;
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}
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}
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if(nn*3!=len) flag = false;
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for(int k = i;i<k+nn;i++){
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if(str[i]!=tmp){
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flag = false;
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break;
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}
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}
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tmp = str[i];
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if(tmp == a||tmp == b) flag = false;
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for(int k = i;i<k+nn;i++){
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if(str[i]!=tmp){
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flag = false;
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break;
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}
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}
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if(flag) printf("YES\n");
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else printf("NO\n");
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}
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return 0;
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}
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