제출 #303335

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
303335		Elegia	비스킷 담기 (IOI20_biscuits)	C++17	컴파일 에러	0 ms	0 KiB

biscuits

#include "biscuits.h"

#include <unordered_map>

using namespace std;

using ll = long long;

ll count_tastiness(ll x, vector<ll> a) {
	a.resize(61);
	vector<unordered_map<ll, ll>> dp(61);
	function<ll(int, ll)> dfs = [&](int k, ll v) {
		if (k == 60) return 1LL;
		if (dp[k].count(v))
			return dp[k][v];
		ll ret = dfs(k + 1, (v + a[k]) / 2);
		if (v + a[k] >= x) ret += dfs(k + 1, (v + a[k] - x) / 2);
		return dp[k][v] = ret;
	};
	return dfs(0, 0);
}

컴파일 시 표준 에러 (stderr) 메시지

biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:12:2: error: 'function' was not declared in this scope
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |  ^~~~~~~~
biscuits.cpp:4:1: note: 'std::function' is defined in header '<functional>'; did you forget to '#include <functional>'?
    3 | #include <unordered_map>
  +++ |+#include <functional>
    4 | 
biscuits.cpp:12:21: error: expression list treated as compound expression in functional cast [-fpermissive]
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |                     ^
biscuits.cpp:12:13: error: expected primary-expression before '(' token
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |             ^
biscuits.cpp:12:14: error: expected primary-expression before 'int'
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |              ^~~
biscuits.cpp:12:21: error: expected primary-expression before ')' token
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |                     ^
biscuits.cpp:12:24: error: 'dfs' was not declared in this scope
   12 |  function<ll(int, ll)> dfs = [&](int k, ll v) {
      |                        ^~~