Upload Codes: AtCoder ABC 395

AtCoder/abc395/A_Strictly_Increasing.cpp

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+#include <bits/stdc++.h>
+#define lo long long
+#define INF INT_MAX
+#define LLM LONG_LONG_MAX
+#define endl "\n"
+
+using namespace std;
+/*
+    toothless. #17
+    @fredcss_dev
+*/
+
+int n, a[1000005], b[1000005];
+bool f[100000005];
+
+signed main()
+{
+    cin >> n;
+    for (int i = 1; i <= n; i++) {
+        cin >> a[i];
+        b[i] = a[i];
+        if (!f[a[i]]) f[a[i]] = 1;
+        else {
+            cout << "No";
+            return 0;
+        }
+    }
+    sort(a + 1, a + 1 + n);
+    for (int i = 1; i <= n; i++) {
+        if (a[i] != b[i]) {
+            cout << "No";
+            return 0;
+        }
+    }
+    cout << "Yes";
+    return 0;
+}