Xâu Con

UPCODER/Other/XAUCON.cpp

@@ -0,0 +1,54 @@
+#include <bits/stdc++.h>
+#include <ext/pb_ds/assoc_container.hpp>
+#include <ext/pb_ds/tree_policy.hpp>
+
+using namespace std;
+using namespace __gnu_pbds;
+
+#define endl '\n'
+#define int long long
+#define inp freopen("file.inp", "r", stdin)
+#define out freopen("file.out", "w", stdout)
+#define TIME 1.0*clock()/CLOCKS_PER_SEC
+#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr)
+template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
+template<typename K, typename V> using ordered_map = tree<K, V, less<K>, rb_tree_tag, tree_order_statistics_node_update>;
+
+const int MAXN = 1e6 + 5;
+const int MOD = 1e9 + 7;
+
+int idx, len;
+string s;
+map<char, int> m;
+
+signed main() {
+    fastIO;
+    cin >> s;
+
+    for (char &c : s)
+        c = tolower(c);
+
+    int i = 1, j = 1, k = 0;
+    int n = s.size();
+    s = ' ' + s;
+
+    while (i <= n && j <= n) {
+        k++;
+        m[s[j]]++;
+
+        while (m[s[j]] > 1) {
+            k--;
+            m[s[i++]]--;
+        }
+
+        if (k > len) {
+            idx = i;
+            len = k;
+        } 
+
+        j++;
+    }
+
+    cout << idx << ' ' << len;
+    return 0;
+}