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AtCoder/abc390/A_12435.cpp

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+#include <bits/stdc++.h>
+#define lo long long
+#define INF INT_MAX
+#define LLM LONG_LONG_MAX
+
+using namespace std;
+const int N = 1e7 + 10;
+/*
+    toothless. #17
+    @fredcss_dev
+*/
+
+int a[N], b[N];
+
+signed main()
+{
+    for (int i = 1; i <= 5; i++) {
+        cin >> a[i];
+        b[i] = a[i];
+    }
+    if (a[1] == 1 && a[2] == 2 && a[3] == 3 && a[4] == 4 && a[5] == 5) {
+        puts("No");
+        return 0;
+    }
+    sort(b + 1, b + 6);
+    int cnt = 0, r = 0;
+    for (int i = 1; i <= 5; i++) {
+        if (a[i] != b[i]) cnt++;
+        if (a[i] != b[i] && i != 1 && a[i - 1] != b[i - 1]) r = 1;
+    }
+    if (cnt == 2 && r == 1) puts("Yes");
+    else puts("No");
+    return 0;
+}