# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
971578 | nguyentunglam | Homework (CEOI22_homework) | C++17 | 8 ms | 8932 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define endl "\n"
using namespace std;
const int N = 1e5 + 10;
pair<int, int> st[N];
int t[N];
int operation[N];
int child[2][N], a[N], order[N];
bool dd[N];
int32_t main() {
#define task ""
cin.tie(0) -> sync_with_stdio(0);
if (fopen("task.inp", "r")) {
freopen("task.inp", "r", stdin);
freopen("task.out", "w", stdout);
}
if (fopen(task".inp", "r")) {
freopen (task".inp", "r", stdin);
freopen (task".out", "w", stdout);
}
string str; cin >> str;
int p;
int id = 0, _id = 0;
for(char c : str) if (c == '?') _id++;
int n = _id;
exit(0);
for(int i = 0; i < str.size(); i++) {
if (str[i] == 'm') {
i += 3;
st[++p] = make_pair(0, 0);
t[p] = str[i - 1] == 'x';
// cout << str[i - 1] << " " << t[p] << endl;
}
else if (str[i] == '?') {
++id;
if (st[p].first == 0) st[p].first = id;
else st[p].second = id;
}
else if (str[i] == ')') {
++_id;
assert(st[p].first && st[p].second);
child[0][_id] = st[p].first;
child[1][_id] = st[p].second;
operation[_id] = t[p];
// cout << _id << " " << st[p].first << " " << st[p].second << " " << operation[_id] << endl;
--p;
if (st[p].first == 0) st[p].first = _id;
else st[p].second = _id;
}
}
auto dfs = [&] (auto self, int u) {
if (u <= n) {
a[u] = order[u];
return;
}
self(self, child[0][u]);
self(self, child[1][u]);
if (operation[u]) a[u] = max(a[child[0][u]], a[child[1][u]]);
else a[u] = min(a[child[0][u]], a[child[1][u]]);
};
for(int i = 1; i <= n; i++) order[i] = i;
do {
// for(int i = 1; i <= n; i++) cerr << order[i] << " "; cerr << endl;
dfs(dfs, _id);
dd[a[_id]] = 1;
} while (next_permutation(order + 1, order + n + 1));
int ans = 0;
for(int i = 1; i <= n; i++) ans += dd[i];
cout << ans;
}
Compilation message (stderr)
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