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OI-codes/S2OJ/1320/1320.cpp

61 lines
1.2 KiB
C++

#include <iostream>
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
std::string s, t;
std::vector<std::pair<int, int>> ans;
bool check() {
if (std::count(s.begin(), s.end(), '1') != std::count(t.begin(), t.end(), '1')) {
return false;
}
for (int i = 0; i < s.size(); i++) {
if (s[i] == t[i]) continue;
int cnt = 0;
bool flag = false;
for (int j = i; j < s.size(); j++) {
if (s[j] == '1') cnt++;
if (s[j] == t[i] && cnt % 2 == 0) {
flag = true;
ans.emplace_back(i + 1, j + 1);
std::reverse(s.begin() + i, s.begin() + j + 1);
break;
}
}
if (!flag) return false;
}
return true;
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> s >> t;
if (check()) {
cout << "YES" << endl
<< ans.size() << endl;
for (auto e : ans) {
cout << e.first << ' ' << e.second << endl;
}
} else {
cout << "NO" << endl;
}
return 0;
}