【习题 6-7 UVA - 804】Petri Net Simulation

【链接】 我是链接,点我呀:)

【题意】

在这里输入题意

【题解】

模拟就好

【代码】

/*
1.Shoud it use long long ?
2.Have you ever test several sample(at least therr) yourself?
3.Can you promise that the solution is right? At least,the main ideal
4.use the puts("") or putchar() or printf and such things?
5.init the used array or any value?
6.use error MAX_VALUE?
7.use scanf instead of cin/cout?
*/
#include <bits/stdc++.h>
using namespace std;

const int N = 100;

int n, m, Q;
int rest[N + 10];
pair<vector <int>, vector <int> >  v[N + 10];
map <int, int> cnt[N+10];

int main() {
	#ifdef LOCAL_DEFINE
		freopen("F:\\c++source\\rush_in.txt", "r", stdin);
		freopen("F:\\c++source\\rush_out.txt", "w", stdout);
	#endif
	ios::sync_with_stdio(0), cin.tie(0);
	int Kase = 0;
	while (cin >> n && n) {
		for (int i = 1; i <= n; i++) cin >> rest[i];
		cin >> m;
		for (int i = 1; i <= m; i++) {
			v[i].first.clear(), v[i].second.clear();
			cnt[i].clear();
			int x;
			cin >> x;
			while (x != 0) {
				if (x < 0) {
					cnt[i][-x]++;
					v[i].first.push_back(-x);
				}
				else {
					v[i].second.push_back(x);
				}
				cin >> x;
			}
		}

		cout << "Case " << ++Kase << ": ";
		bool alive = true;
		cin >> Q;
		for (int i = 1; i <= Q; i++) {
			bool ok = false;
			for (int j = 1; j <= m; j++) {
				bool ok1 = true;
				for (int x : v[j].first) {
					if (rest[x] < cnt[j][x]) ok1 = false;
				}
				if (ok1) {
					for (int x : v[j].first) {
						rest[x]--;
					}
					for (int x : v[j].second) {
						rest[x]++;
					}
					ok = true;
					break;
				}
			}
			if (!ok) {
				alive = ok;
				cout << "dead after " << i-1 << " transitions" << endl;
				break;
			}
		}
		if (alive) {
			cout << "still live after " << Q << " transitions" << endl;
		}
		cout << "Places with tokens:";
		for (int i = 1; i <= n; i++)
			if (rest[i])
				cout << " " << i << " " << "(" << rest[i] << ")";
		cout << endl << endl;
	}
	return 0;
}