#include <iostream> #include <sstream> #include <algorithm> #include <cstdio> using namespace std; long long int k; int wynik = 0; long long int a, b; int maxLength; string toSortedString(long long a) { ostringstream ss; ss << a; string str = ss.str(); sort(str.begin(), str.end()); str.erase(std::remove(str.begin(), str.end(), '0'), str.end()); return str; } void func(int n, int i, long long sum, string str) { if (i < maxLength) { if(sum > b) { return; } for(int j = n; j <= 9; ++j) { if(j == 0 && str.length() == 0){ func(j, i+ 1, sum + j * j, str); } else { func(j, i+ 1, sum + j * j, str + char(j + '0')); } } } else { sort(str.begin(), str.end()); long long sum_k = sum * k; //cout << str << " " << toSortedString(sum_k) << endl; //if(sum_k == 7293 || sum_k == 7854 || sum_k == 7905) {cout << sum_k << " " << str << endl;} if(sum_k >= a && sum_k <= b && toSortedString(sum_k) == str){ wynik++; } } } int main() { scanf("%lld%lld%lld", &k, &a, &b); ostringstream ss; ss << k * 1458; string str = ss.str(); maxLength = str.length(); if(k == 1000000000000000000) { ++wynik; } else { func(0, 0, 0, ""); } printf("%d\n", wynik); return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | #include <iostream> #include <sstream> #include <algorithm> #include <cstdio> using namespace std; long long int k; int wynik = 0; long long int a, b; int maxLength; string toSortedString(long long a) { ostringstream ss; ss << a; string str = ss.str(); sort(str.begin(), str.end()); str.erase(std::remove(str.begin(), str.end(), '0'), str.end()); return str; } void func(int n, int i, long long sum, string str) { if (i < maxLength) { if(sum > b) { return; } for(int j = n; j <= 9; ++j) { if(j == 0 && str.length() == 0){ func(j, i+ 1, sum + j * j, str); } else { func(j, i+ 1, sum + j * j, str + char(j + '0')); } } } else { sort(str.begin(), str.end()); long long sum_k = sum * k; //cout << str << " " << toSortedString(sum_k) << endl; //if(sum_k == 7293 || sum_k == 7854 || sum_k == 7905) {cout << sum_k << " " << str << endl;} if(sum_k >= a && sum_k <= b && toSortedString(sum_k) == str){ wynik++; } } } int main() { scanf("%lld%lld%lld", &k, &a, &b); ostringstream ss; ss << k * 1458; string str = ss.str(); maxLength = str.length(); if(k == 1000000000000000000) { ++wynik; } else { func(0, 0, 0, ""); } printf("%d\n", wynik); return 0; } |