Assembly-Line scheduling------code in c++

标签：c++   动态   

#include<iostream>
#include<cstdlib>
#include<vector>
using namespace std;

int num_of_st;

void getdata(vector<int> & v, int n)
{
	if (!v.empty()) 
		throw runtime_error("v empty");
	int t;
	for (int i = 0; i < n; ++i) {
		cin >> t;
		v.push_back(t);
	}
	return;
}

int main(void)
{
	try{
		cin >> num_of_st;
		int e1, x1, e2, x2;
		cin >> e1 >> x1 >> e2 >> x2;

		vector<int> a1, t1, a2, t2;
		cout << "st 1: " << endl;
		getdata(a1, num_of_st);
		getdata(t1, num_of_st-1);
		cout << "st 2: " << endl;
		getdata(a2,num_of_st);
		getdata(t2, num_of_st-1);
		
		//init;
		vector<int> way1 , way2;
		int f1 = e1+a1[0], f2 = e2 + a2[0];
		way1.push_back(1); way2.push_back(2);

		for (int i = 1; i < num_of_st; ++i) {
			//get new f1;
			int nf1;
			vector<int> nway1(way1);
			if (f1 + a1[i] > f2 + t2[i - 1] + a1[i]) {
				nf1 = f2 + t2[i - 1] + a1[i];
				vector<int>(way2).swap(nway1);
			}
			else 
				nf1 = f1 + a1[i];
			nway1.push_back(1);

			//get new f2;
			int nf2;
			vector<int> nway2(way2);
			if (f2 + a2[i] > f1 + t1[i - 1] + a2[i]) {
				nf2 = f1 + t1[i - 1] + a2[i];
				vector<int>(way1).swap(nway2);
			}
			else nf2 = f2 + a2[i];
			nway2.push_back(2);

			//renew data.
			f1 = nf1; f2 = nf2;
			way1.swap(nway1); way2.swap(nway2);
		}

		bool from1 = f1 + x1 > f2 + x2 ? false : true;
		int minT = from1 ? f1 + x1 : f2 + x2;
		cout << "Min time used: " << minT << endl;
		cout << "The way is: " << endl;
		if (from1) {
			for (vector<int>::iterator it = way1.begin();
				it != way1.end(); ++it) {
				cout << "Line: " << *it << ' ' << "Station " << it - way1.begin() + 1 << endl;
			}
			cout << endl;
		}
		else
		{	
			for (vector<int>::iterator it = way2.begin();
				it != way2.end(); ++it) {
				cout << "Line: " << *it << ' ' << "Station: " << it - way2.begin() + 1 << endl;
			}
			cout << endl;
		}

	}
	catch (exception e) {
		cout << e.what() << endl;
	}
	cout << "Done." << endl;
	system("pause");
	return 0;
}

 动态规划最短路径问题：

Assembly-Line scheduling------code in c++

标签：c++   动态   

原文地址：http://blog.csdn.net/qq_21555605/article/details/45012527