15 lines
269 B
C++
15 lines
269 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int n;
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cin >> n;
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int a = n / 100;
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int b = (n - a * 100) / 10;
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int c = n % 10;
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if (a == b && b == c) cout << "yes" << endl;
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else cout << "no" << endl;
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return 0;
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}
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