제출 #476309

#제출 시각아이디문제언어결과실행 시간메모리
476309tht2005Palindrome-Free Numbers (BOI13_numbers)C++14
100 / 100
1 ms376 KiB
#include <bits/stdc++.h> using namespace std; typedef unsigned long long ll; ll memo[19][11][11][2][2]; ll dp(const string& s, int i, int p1, int p2, int tight, int lz) { if(i == s.size()) return 1; ll& res = memo[i][p1][p2][tight][lz]; if(~res) return res; res = 0; if(tight) { if(lz) { res += dp(s, i + 1, 10, 10, 1, 1); for(int c = 1; c < 10; ++c) res += dp(s, i + 1, 10, c, 1, 0); } else { for(int c = 0; c < 10; ++c) { if(c ^ p1 && c ^ p2) { res += dp(s, i + 1, p2, c, 1, 0); } } } } else { if(lz) { res += dp(s, i + 1, 10, 10, s[i] > '0', 1); for(int c = 1; c + 48 < s[i]; ++c) res += dp(s, i + 1, p2, c, 1, 0); if(s[i] > '0' && s[i] ^ (p1 + 48) && s[i] ^ (p2 + 48)) res += dp(s, i + 1, p2, s[i] - 48, 0, 0); } else { for(int c = 0; c + 48 < s[i]; ++c) { if(c ^ p1 && c ^ p2) { res += dp(s, i + 1, p2, c, 1, 0); } } if(s[i] ^ (p1 + 48) && s[i] ^ (p2 + 48)) res += dp(s, i + 1, p2, s[i] - 48, 0, 0); } } return res; } ll calc(ll i) { string s = to_string(i); memset(memo, -1, sizeof(memo)); return dp(s, 0, 10, 10, 0, 1); } int main() { ios::sync_with_stdio(false); cin.tie(NULL); ll l, r; cin >> l >> r; cout << calc(r) - (l ? calc(l - 1) : 0); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

numbers.cpp: In function 'll dp(const string&, int, int, int, int, int)':
numbers.cpp:10:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  if(i == s.size()) return 1;
      |     ~~^~~~~~~~~~~
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