编程算法 - 篱笆修理(Fence Repair) 堆(heap) 代码(C++)

篱笆修理(Fence Repair) 堆(heap) 代码(C++)


本文地址: http://blog.csdn.net/caroline_wendy


题目参考: http://blog.csdn.net/caroline_wendy/article/details/37911157


本题比较简单, 直接使用堆(heap)选取两个最小的值, 合并再放入堆, 最后求出和.
【编程算法 - 篱笆修理(Fence Repair) 堆(heap) 代码(C++)】比起贪婪算法O(n^2), 时间复杂度O(nlogn).


代码:

/* * main.cpp * *Created on: 2014.7.20 *Author: spike *//*eclipse cdt, gcc 4.8.1*/#include #include #include #include using namespace std; class Program { static const int MAX_N = 100; int N=3, L[MAX_N] = {8,5,8}; public: void solve() { int ans = 0; priority_queue, greater> que; for (int i=0; i 1) { int l1, l2; l1 = que.top(); que.pop(); l2 = que.top(); que.pop(); ans += l1+l2; que.push(l1+l2); } printf("result = %d\n", ans); } }; int main(void) { Program iP; iP.solve(); return 0; }


输出:

result = 34












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