EASY!!!

上代码：

#include<bits/stdc++.h>
using namespace std;
char s[100010];
int cnt=0;
void ppmatch(int n) {
int w=0;
int l=0;
for(int i=0; i<cnt; i++) {
if(s[i]'W') w++;
if(s[i]'L') l++;
if((w>=n || l>=n) && (w-l>=2 || l-w>=2)) {
cout<<w<<":"<<l<<endl;
w=0;
l=0;
}
}

cout<<w<<":"<<l<<endl;

}

int main() {
//freopen("pingpong.in","r",stdin);
//freopen("pingpong.out","w",stdout);

char ch;
while(cin>>ch && ch!='E') {
        if(ch=='W' || ch=='L') s[cnt++]=ch;
}

ppmatch(11);
cout<<endl;

ppmatch(21);
return 0;

}