Testing Round #16 (Unrated)

codeforces/T16/README

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+Testing Round #16 (Unrated)
+https://codeforces.com/contest/1351

codeforces/T16/a.cpp

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+#include <bits/stdc++.h>
+using namespace std;
+
+int main() {
+    int t, a, b;
+    scanf("%d", &t);
+    while (t--) {
+        scanf("%d%d", &a, &b);
+        printf("%d\n", a+b);
+    }
+}

codeforces/T16/b.cpp

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+#include <bits/stdc++.h>
+using namespace std;
+
+int main() {
+    int t;
+    scanf("%d", &t);
+    while (t--) {
+        int a[2], b[2];
+        scanf("%d%d%d%d", &a[0], &a[1], &b[0], &b[1]);
+        bool flag = false;
+        for (int i=0;i<2;++i) {
+            for (int j=0;j<2;++j) {
+                if (a[i] == b[j] && (a[1-i] + b[1-j] == a[i]))
+                    flag = true;
+            }
+        }
+        puts(flag ? "YES" : "NO");
+    }
+}

codeforces/T16/c.cpp

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+#include <bits/stdc++.h>
+using namespace std;
+using lint = long long;
+
+int main() {
+    ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
+    int t;
+    cin >> t;
+    while (t--) {
+        int ans = 0;
+        string s;
+        cin >> s;
+
+        unordered_map<lint, unordered_map<lint, bool>> m;
+        int r = 10000, c = 10000;
+        for (char x : s) {
+            lint u = 1LL * r * 20000 + c;
+            if (x == 'N') r += 1;
+            else if (x == 'S') r -= 1;
+            else if (x == 'W') c -= 1;
+            else if (x == 'E') c += 1;
+            lint v = 1LL * r * 20000 + c;
+            if (u > v) swap(u, v);
+            if (m[u][v]) ans++;
+            else {
+                m[u][v] = 1;
+                ans += 5;
+            }
+        }
+        cout << ans << '\n';
+    }
+}