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leetcode 40和leetcode 410了解一下
第二题: #include <iostream> #include<vector> using namespace std; int Judge(vector<int>&data, int mid, int m, int n) { int cnt = 0; int sum = 0; for (int i = 0; i < n; i++) { if (sum + data[i] > mid) { sum = data[i]; cnt++; if (cnt > m - 1) { return 0; } } else { sum += data[i]; } } return 1; } int Binary_Search(vector<int>&data, int left, int right, int m, int n) { int mid = 0; while (left < right) { mid = left + (right - left) / 2; if (Judge(data, mid, m, n)) { right = mid; } else // { left = mid + 1; } } return left; } int main() { int n = 0, m = 0; cin >> n >> m; vector<int> data(n,0); int max_num = 0; int sum = 0; int i = 0; for (i = 0; i < n; i++) { cin >> data[i]; if (data[i] > max_num) { max_num = data[i]; } sum += data[i]; } cout << Binary_Search(data, max_num, sum, m, n); return 0; }
第一题: #include <iostream> #include<vector> #include<algorithm> #include <numeric> #include <limits> using namespace std; void combinationSum2DFS(vector<int> &num, int target, int start, bool &falg) { if (target == 0) { falg = true; return; } for (int i = start; i < num.size(); ++i) { if (target < num[i])return; //out.push_back(num[i]); combinationSum2DFS(num, target - num[i], i + 1, falg); //out.pop_back(); while (i < num.size() - 1 && num[i] == num[i + 1])i++; if (falg == true) return; } } bool miHomeGiftBag(vector<int> &num, int target) { bool falg = false; vector<int> out; sort(num.begin(), num.end()); combinationSum2DFS(num, target, 0, falg); if (falg) return true; else return false; } int main() { bool res; int _p_size = 0; cin >> _p_size; vector<int> _p(_p_size, 0); int _p_item; for (int _p_i = 0; _p_i<_p_size; _p_i++) { cin >> _p_item; _p[_p_i] = _p_item; } int _M; cin >> _M; res = miHomeGiftBag(_p, _M); cout << res << endl; return 0; }
被模板坑惨了
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