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12 lines
184 B
C++
12 lines
184 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int x, y;
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int main() {
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cin >> x >> y;
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cout << (-1 <= x && x <= 1 && -1 <= y && y <= 1 ? "yes" : "no") << endl;
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return 0;
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}
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