0
1
mirror of https://git.sb/baoshuo/OI-codes.git synced 2024-12-13 05:06:28 +00:00
OI-codes/S2OJ/2/2.cpp

42 lines
893 B
C++

#include <bits/stdc++.h>
using namespace std;
int n, nxt[300005], pre[300005], a[300005], cnt;
vector<int> b[300005];
int main() {
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i];
if (a[i] == -1) ++cnt;
}
for (int i = 1; i < cnt; i++) {
nxt[i] = i + 1;
}
nxt[cnt] = 1;
for (int i = 2; i <= cnt; i++) {
pre[i] = i - 1;
}
pre[1] = cnt;
int now = 1;
for (int i = 1; i <= n; i++) {
if (a[i] == -1) {
nxt[pre[now]] = nxt[now];
pre[nxt[now]] = pre[now];
} else {
b[now].push_back(a[i]);
}
now = nxt[now];
}
cout << cnt << endl;
for (int i = 1; i <= cnt; i++) {
cout << b[i].size() << ' ';
for (int j = 0; j < b[i].size(); ++j) {
cout << b[i][j] << ' ';
}
cout << endl;
}
return 0;
}