#include <vector>
#include <string>
#include <sstream>
#include <cstdlib>
using namespace std;

struct VendingMachine
{
	int motorUse(vector<string> prices, vector<string> purchases)
	{
		vector<int>           sum;
		vector< vector<int> > pri(prices.size());
		for(int i=0; i<prices.size(); ++i)
		{
			stringstream sin(prices[i]);
			for(int j=0,n; sin>>n; ++j)
				{if(j>=sum.size())sum.push_back(0); sum[j]+=n; pri[i].push_back(n);}
		}
		int M = pri[0].size();

		int mot = 0;
		int pc=0, pt=-5;
		for(int i=0; i<purchases.size(); ++i)
		{
			stringstream sin(purchases[i]);
			string a; getline(sin,a,',');
			string b; getline(sin,b,':');
			string c; getline(sin,c);
			int sh = atoi(a.c_str());
			int cl = atoi(b.c_str());
			int  t = atoi(c.c_str());

			if( pri[sh][cl] == 0 )
				return -1;

			if( t-pt >= 5 )
			{
				// rotate
				int hc = max_element(sum.begin(), sum.end()) - sum.begin();
				mot += min( abs(hc-pc), M-abs(hc-pc) );
				pc = hc;
			}

			// buy
			sum[cl]    -= pri[sh][cl];
			pri[sh][cl] = 0;
			mot += min( abs(cl-pc), M-abs(cl-pc) );
			pc = cl;
			pt = t;
		}

		// rotate
		int hc = max_element(sum.begin(), sum.end()) - sum.begin();
		mot += min( abs(hc-pc), M-abs(hc-pc) );
		pc = hc;

		return mot;
	}
};
