#include <iostream>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <map>
#include <string>
#include <vector>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <algorithm>
#include <unordered_map>
using namespace std;
/*解題思路：*/
int main() {
string abc;
cin >> abc; //輸入字符串a(chǎn)bc
string str(abc);
string::iterator it; //迭代器it
for (it = str.begin(); it != str.end(); ++it) {
if ((*it == 'R') && (*(it + 1) == 'E') && (*(it + 2) == 'D')) {
str.erase(it); //刪除it處的一個字符(it是個string類型的迭代器)
str.erase(it);
str.erase(it);
}
}
cout << str << endl;
string tmp;
string max = "0";
for (it = str.begin(); it <= str.end(); ++it) {
cout << tmp << endl;
if (it == str.end()) {
break;
}
if ((*it >= '0') && (*it <= '9')) {
tmp = tmp + *it;
} else {
if (tmp.length() > max.length())
max = tmp;
else if (tmp.length() == max.length()) {
if (tmp > max)
max = tmp;
}
tmp.clear();
}
}
if (tmp.length() > max.length())
max = tmp;
else if (tmp.length() == max.length()) {
if (tmp > max)
max = tmp;
}
if (max == "0")
max = -1;
cout << max << endl;
return 0;
}
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