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#13356. 「NOIP2022模拟赛1119」rev
http://www.nfls.com.cn:10611/submission/242774
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NFLSOJ/13356/13356.cpp
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63
NFLSOJ/13356/13356.cpp
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#include <iostream>
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#include <algorithm>
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#include <fstream>
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#include <string>
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#include <utility>
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#include <vector>
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// using std::cin;
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// using std::cout;
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std::ifstream cin("rev.in");
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std::ofstream cout("rev.out");
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const char endl = '\n';
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std::string s, t;
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std::vector<std::pair<int, int>> ans;
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bool check() {
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if (std::count(s.begin(), s.end(), '1') != std::count(t.begin(), t.end(), '1')) {
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return false;
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}
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for (int i = 0; i < s.size(); i++) {
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if (s[i] == t[i]) continue;
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int cnt = 0;
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bool flag = false;
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for (int j = i; j < s.size(); j++) {
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if (s[j] == '1') cnt++;
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if (s[j] == t[i] && cnt % 2 == 0) {
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flag = true;
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ans.emplace_back(i + 1, j + 1);
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std::reverse(s.begin() + i, s.begin() + j + 1);
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break;
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}
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}
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if (!flag) return false;
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}
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return true;
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> s >> t;
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if (check()) {
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cout << "YES" << endl
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<< ans.size() << endl;
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for (auto e : ans) {
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cout << e.first << ' ' << e.second << endl;
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}
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} else {
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cout << "NO" << endl;
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}
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return 0;
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}
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NFLSOJ/13356/samples/chk.cpp
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NFLSOJ/13356/samples/chk.cpp
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NFLSOJ/13356/samples/ex_rev1.ans
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NFLSOJ/13356/samples/ex_rev1.ans
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NFLSOJ/13356/samples/ex_rev1.in
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NFLSOJ/13356/samples/ex_rev1.in
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NFLSOJ/13356/samples/ex_rev2.ans
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NFLSOJ/13356/samples/ex_rev2.ans
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NFLSOJ/13356/samples/ex_rev2.in
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NFLSOJ/13356/samples/ex_rev2.in
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