結果
問題 | No.2209 Flip and Reverse |
ユーザー |
|
提出日時 | 2023-02-10 21:58:09 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 20 ms / 2,000 ms |
コード長 | 4,033 bytes |
コンパイル時間 | 1,976 ms |
コンパイル使用メモリ | 197,164 KB |
最終ジャッジ日時 | 2025-02-10 12:41:41 |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 30 |
ソースコード
#ifdef LOCAL#define _GLIBCXX_DEBUG#endif#pragma region#include <bits/stdc++.h>using namespace std;using ll = long long;using ull = unsigned long long;using i128 = __int128;using u128 = unsigned __int128;using vi = vector<int>;using vll = vector<ll>;using vvi = vector<vector<int>>;using vvll = vector<vector<ll>>;using vvvi = vector<vector<vector<int>>>;using vpi = vector<pair<int,int>>;using vpll = vector<pair<ll,ll>>;using vs = vector<string>;using vb = vector<bool>;using vvb = vector<vector<bool>>;using pi = pair<int,int>;using pll = pair<ll,ll>;template<typename T = int> using spq = priority_queue<T, vector<T>, greater<T>>;template<typename T = int> using gpq = priority_queue<T>;#define fi first#define se second#define pb push_back#define fore(p,a) for (auto p : a)#define overload4(a,b,c,d,name,...) name#define rep1(n) for (int i = 0; i < int (n); ++i)#define rep2(i,n) for (int i = 0; i < int (n); ++i)#define rep3(i,a,b) for (int i = a; i < int (b); ++i)#define rep4(i,a,b,c) for (int i = a; i < int (b); i += c)#define rep(...) overload4(__VA_ARGS__,rep4,rep3,rep2,rep1)(__VA_ARGS__)#define rrep1(n) for (int i = n; i--;)#define rrep2(i,n) for (int i = n; i--;)#define rrep3(i,a,b) for (int i = b; i-- > (a);)#define rrep4(i,a,b,c) for (int i = (a) + ((b) - (a) - 1) / (c) * (c); i >= (a); i -= c)#define rrep(...) overload4(__VA_ARGS__,rrep4,rrep3,rrep2,rrep1)(__VA_ARGS__)#define all(container) begin(container), end(container)#define rall(container) rbegin(container), rend(container)#define mvvi(name, row, column) vvi name(row, vi(column))#define mvvll(name, row, column) vvll name(row, vll(column))#define mvvb(name, row, column) vvb name(row, vb(column))#define Max(...) max({__VA_ARGS__})#define Min(...) min({__VA_ARGS__})#define fin exit(0)#define popc __builtin_popcount#define inrange(x, l, r) ((l) <= (x) && (x) < (r))#define sq(x) ((x) * (x))#ifdef LOCALtemplate<typename T> string internal_vectostr(vector<T> v) { string ret; for (int i = 0; i < (int) v.size(); i++) ret += (i ? ", " : "") + to_string(v[i]); return ret; }#define dbg(x) cerr << "[DEBUG] " << __LINE__ << ": " << #x << " = " << x << endl#define dbv(x) cerr << "[DEBUG] " << __LINE__ << ": " << #x << " = { " << internal_vectostr(x) << " }" << endl#define tabout(tab, n, m) cout << "[DEBUG]\n"; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) cout << tab[i][j] << ' '; cout << endl; }#elsetemplate<typename T> void internal_vectostr(vector<T> v) {}#define dbg(x) ((void) 0)#define dbv(x) ((void) 0)#define tabout(tab, n, m) ((void) 0)#endifconstexpr int INF = 1001001001;constexpr ll LINF = 1LL << 60;constexpr double EPS = 1e-10;const double PI = acos(-1);template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }ll fact(ll x) { return x == 0 ? 1 : x * fact(x - 1); }ll comb(ll n, ll r) { if (r < 0 || n < r) return 0; ll ret = 1; for (ll i = 1; i <= r; i++) { ret *= n; n--; ret /= i; } return ret; }int Yes(bool f=1) { cout << (f ? "Yes" : "No") << '\n'; return 0; }int No() { Yes(0); return 0; }int YES(bool f=1) { cout << (f ? "YES" : "NO") << '\n'; return 0; }int NO() { YES(0); return 0; }int yes(bool f=1) { cout << (f ? "yes" : "no") << '\n'; return 0; }int no() { yes(0); return 0; }template<class T> int printvec(vector<T> v) { for (int i = 0; i < (int) v.size(); i++) cout << (i ? " " : "") << v[i]; cout << '\n'; return 0; }struct IoInit { IoInit() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << setprecision(15) << fixed; cerr << setprecision(15) << fixed; } }io_init;#pragma endregionint main(){int n;string s,t;cin>>n>>s>>t;string trev=t;reverse(all(trev));int x=0,y=0;rep(n){if(s[i]!=t[i])x++;if(s[i]!=trev[i])y++;}int ans=INF;if(x%2==0)chmin(ans,x);if(y%2==1)chmin(ans,y);assert(ans!=INF);cout<<ans<<endl;}