HDU DFS

#include<iostream> using namespace std; int main() { int a[11]; a[1] = 1; a[0] = 1; for (int i = 2; i <= 10; i++) a[i] = a[i - 1] * i; for (int i = 1; i <= 3628800; i++) { int y = i, s = 0; while (y >

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