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13 lines
225 B
13 lines
225 B
2 years ago
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#include <bits/stdc++.h>
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using namespace std;
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const int N = 10;
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int main() {
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string s;
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cin >> s;
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if (s[0] == s[3] && s[1] == s[2])
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cout << "YES";
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else
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cout << "NO";
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return 0;
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}
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