/
githubmirror
/
hello-algo
Обзор
Документация
Войти
/
githubmirror
/
hello-algo
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
main
en/codes/cpp/chapter_backtracking/subset_sum_i_naive.cpp
54 строки
2 KB
Yudong Jin
Translate all code to English (#1836)
31 дек 2025, 02:44
Не верифицирован
31 дек 2025, 02:44
2778a6f
Код
Авторство
О чём код?
/** * File: subset_sum_i_naive.cpp * Created Time: 2023-06-21 * Author: krahets (krahets@163.com) */ #include "../utils/common.hpp" /* Backtracking algorithm: Subset sum I */ void backtrack(vector<int> &state, int target, int total, vector<int> &choices, vector<vector<int>> &res) { // When the subset sum equals target, record the solution if (total == target) { res.push_back(state); return; } // Traverse all choices for (size_t i = 0; i < choices.size(); i++) { // Pruning: if the subset sum exceeds target, skip this choice if (total + choices[i] > target) { continue; } // Attempt: make choice, update element sum total state.push_back(choices[i]); // Proceed to the next round of selection backtrack(state, target, total + choices[i], choices, res); // Backtrack: undo choice, restore to previous state state.pop_back(); } } /* Solve subset sum I (including duplicate subsets) */ vector<vector<int>> subsetSumINaive(vector<int> &nums, int target) { vector<int> state; // State (subset) int total = 0; // Subset sum vector<vector<int>> res; // Result list (subset list) backtrack(state, target, total, nums, res); return res; } /* Driver Code */ int main() { vector<int> nums = {3, 4, 5}; int target = 9; vector<vector<int>> res = subsetSumINaive(nums, target); cout << "Input array nums = "; printVector(nums); cout << "target = " << target << endl; cout << "All subsets with sum equal to " << target << " are res = " << endl; printVectorMatrix(res); return 0; }