37 lines
501 B
C++
37 lines
501 B
C++
#include <iostream>
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#include <cctype>
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#include <functional>
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using namespace std;
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bool odd()
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{
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function<void ()> prev = []{};
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while(true) {
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int c = cin.get();
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if (!isalpha(c)) {
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prev();
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cout.put(c);
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return c != '.';
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}
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prev = [=] { cout.put(c); prev(); };
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}
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}
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bool even()
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{
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while(true) {
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int c;
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cout.put(c = cin.get());
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if (!isalpha(c)) return c != '.';
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}
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}
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int main()
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{
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bool e = false;
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while( e ? odd() : even() ) e = !e;
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return 0;
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}
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