Time Limit: 2s Memory Limit: 192MB
Problem Description
Output all “Narcissistic Numbers”. A “Narcissistic Number” is a three-digit number such that the sum of the cubes of its digits equals the number itself. For example: 371 is a “Narcissistic Number” because 371 = 3^3 + 7^3 + 1^3.
Input Format
None
Output Format
Output all “Narcissistic Numbers” (in ascending order, one per line)
Sample Input
None
Sample Output
None
Code
#include <iostream>
using namespace std;
int main() {
for (int num = 100; num <= 999; ++num) {
int a = num / 100; // Hundreds place
int b = (num / 10) % 10; // Tens place
int c = num % 10; // Units place
if (a*a*a + b*b*b + c*c*c == num) {
cout << num << endl;
}
}
return 0;
}
Output Result
Iterate through all three-digit numbers.
Key Points of the Program:
- Use a for loop to iterate through the number range
- Mathematical method for digit decomposition
- Optimized implementation of cube calculation
- Conditional judgment and output format control
- Program efficiency analysis
The above code is relatively simple and will not be explained in detail! Interested students can write one themselves.
C++ Basic Tutorial Collection
C++ Basic Materials
1. C++ Output
2. C++ Variables
3. C++ Input
4. C++ Expressions
5. IF Statements
6. IF Applications
7. WHILE Loop Statements
8. FOR Loop Statements
9. Arrays
10. One-Dimensional Arrays
11. Two-Dimensional Arrays
12. C++ Functions
13. C++ File Operations – Writing Files
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