48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
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#include <bits/stdc++.h>
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using namespace std;
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//UVA12096 集合栈计算机
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#define ALL(x) x.begin(),x.end()
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#define INS(x) inserter(x,x.begin()) //注意宏的括号和inserter
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typedef set<int> Set;
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map<Set, int> IDCache;
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vector<Set> setCache;
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int t, n;
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char cmd[10];
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int getID(Set s) {
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if (IDCache.count(s))return IDCache[s];
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setCache.push_back(s); //将新集合加入Setcache
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return IDCache[s] = setCache.size() - 1;//将ID加入map ，同时返回新分配的ID值
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}
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int main() {
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scanf("%d", &t);
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while (t--) {
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scanf("%d", &n);
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stack<int> s;
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while (n--) {
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scanf(" %s", &cmd);
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if (cmd[0] == 'P')s.push(getID(Set()));
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else if (cmd[0] == 'D')s.push(s.top());
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else {
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Set s1 = setCache[s.top()];
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s.pop();
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Set s2 = setCache[s.top()];
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s.pop();
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Set x;
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if (cmd[0] == 'U')set_union(ALL(s1), ALL(s2), INS(x));
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if (cmd[0] == 'I')set_intersection(ALL(s1), ALL(s2), INS(x));
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if (cmd[0] == 'A') {
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x = s2;
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x.insert(getID(s1));
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}
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s.push(getID(x));
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}
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printf("%d\n", setCache[s.top()].size());
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}
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puts("***");
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}
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}
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