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Progressive hints first, then the full explanation and implementation when you're ready to cash out.
Review status
AI-generated and still unreviewed. Double-check the details before internalizing them.
Hints
Open only as much as you need to keep the solve alive.
This is an April Fools output-only-ish problem. The sample input is bait; the actual work is decoding the tiny equation.
Look at less like algebra and more like how characters are named on the internet.
The prefix is the standard notation for a Unicode code point.
The statement literally shows a smiling emoji: . Find its Unicode code point, then output the part after .
The emoji is Unicode , so the required string is . That is the whole damn problem.
The equation
is not normal arithmetic. In Unicode notation, characters are written as
where is the character's code point, usually in hexadecimal.
The statement asks us to "show a smile" and contains the emoji . That emoji is the grinning face with smiling eyes, whose Unicode code point is
Since the problem already gives the part as , the missing string is just
So the solution is brutally simple: ignore the input and print . April Fools problems really do be like that.
We need to output a string such that
Interpreting as Unicode code point notation, the displayed happy emoji corresponds to
Therefore choosing
makes equal to the Unicode representation of the happy emoji. Hence the output satisfies the required equation, so the program is correct.
The program performs no computation depending on the input. Its time complexity is
and its memory usage is
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void setIO() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
}
int main() {
setIO();
cout << "1F601\n";
}#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void setIO() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
}
int main() {
setIO();
cout << "1F601\n";
}