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@@ -0,0 +1,27 @@
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+#include <bits/stdc++.h>
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+
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+using namespace std;
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+
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+int main() {
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+ string a, b;
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+ while (cin >> a >> b) {
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+ reverse(a.begin(), a.end());
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+ reverse(b.begin(), b.end());
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+ if (a == "0" || b == "0") {
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+ cout << "0" << endl;
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+ continue;
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+ }
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+ vector<int> c(a.size() + b.size(), 0);
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+ for (size_t i = 0; i < a.size(); i++)
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+ for (size_t j = 0; j < b.size(); j++)
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+ c[j + i] += (a[i] - '0') * (b[j] - '0');
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+ for (size_t i = 0; i < c.size(); i++) {
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+ c[i + 1] += c[i] / 10;
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+ c[i] = c[i] % 10;
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+ }
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+ if (c.back() == 0)c.erase(c.end() - 1);
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+ copy(c.rbegin(), c.rend(), ostream_iterator<int>(cout, ""));
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+ cout << endl;
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+ }
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+ return 0;
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+}
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