Merge pull request #316 from xirc/atcoder/abc053

AtCoder/ABC053

Author: xirc

atcoder/abc053/A/main.cpp

@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    int x;
+    cin >> x;
+    if (x < 1200) {
+        cout << "ABC" << endl;
+    } else {
+        cout << "ARC" << endl;
+    }
+
+    return 0;
+}

atcoder/abc053/B/main.cpp

@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    string s;
+    cin >> s;
+    int l = s.find_first_of('A');
+    int r = s.find_last_of('Z');
+    cout << (r - l + 1) << endl;
+
+    return 0;
+}

atcoder/abc053/C/main.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    ll x;
+    cin >> x;
+    ll p = x / 11;
+    ll q = x % 11;
+    if (q == 0) {
+        cout << 2 * p << endl;
+    } else if (q <= 6) {
+        cout << 2 * p + 1 << endl;
+    } else {
+        cout << 2 * p + 2 << endl;
+    }
+
+    return 0;
+}

atcoder/abc053/D/main.cpp

@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int N;
+vector<int> A;
+
+int solve() {
+    unordered_set<int> s;
+    for (auto a : A) {
+        s.insert(a);
+    }
+    int K = s.size();
+    if (K % 2 == 0) return K - 1;
+    else return K;
+}
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    cin >> N;
+    A.assign(N, 0);
+    for (int i = 0; i < N; ++i) {
+        cin >> A[i];
+    }
+    cout << solve() << endl;
+
+    return 0;
+}