G - Inscryption

https://codeforces.com/gym/104128/submission/192548681

Gym/104128/G/G.cpp

@@ -0,0 +1,60 @@
+#include <iostream>
+#include <algorithm>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int t;
+
+    cin >> t;
+
+    while (t--) {
+        int n, cnt = 0, cnt_del = 0;
+        bool flag = false;
+
+        cin >> n;
+
+        for (int i = 1, x; i <= n; i++) {
+            cin >> x;
+
+            if (x == 1) {
+                cnt++;
+            } else if (x == -1) {
+                cnt--;
+
+                if (cnt < 0) {
+                    if (cnt_del) {
+                        cnt_del--;
+                        cnt += 2;
+                    } else {
+                        flag = true;
+                    }
+                }
+            } else {  // x == 0
+                if (cnt) {
+                    cnt--;
+                    cnt_del++;
+                } else {
+                    cnt++;
+                }
+            }
+        }
+
+        if (flag) {
+            cout << -1 << endl;
+        } else {
+            int p = cnt + (n - cnt) / 2 + 1,
+                q = cnt + 1,
+                g = std::__gcd(p, q);
+
+            cout << p / g << ' ' << q / g << endl;
+        }
+    }
+
+    return 0;
+}