some programs!

dsa/linear_list/dsa_0205_polynomial_addition.cpp

@@ -0,0 +1,49 @@
+#include <cmath>
+#include <iostream>
+#include <map>
+
+using namespace std;
+
+class Polynomial : public map<unsigned int, long long, greater<>> {
+public:
+    Polynomial operator+=(const Polynomial& other) {
+        for (const auto& [exp, coef] : other) {
+            (*this)[exp] += coef;
+        }
+        return *this;
+    }
+
+    void print() const {
+        for (const auto& [exp, coef] : *this) {
+            if (coef == 0) { continue; }
+            cout << "[ " << coef << " " << exp << " ] ";
+        }
+        cout << endl;
+    }
+};
+
+Polynomial input_polynomial() {
+    long long coefficient;
+    int exponent;
+    Polynomial polynomial;
+    while (cin >> coefficient >> exponent && exponent >= 0) {
+        polynomial[exponent] += coefficient;
+    }
+    return polynomial;
+}
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int n;
+    cin >> n;
+    for (int _ = 0; _ < n; _++) {
+        Polynomial polynomial1 = input_polynomial();
+        Polynomial polynomial2 = input_polynomial();
+        polynomial1 += polynomial2;
+        polynomial1.print();
+    }
+
+    return 0;
+}