// https://oj.uz/problem/view/IOI08_printer
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
// Macros
#define pb push_back
#define pf push_front
#define mp make_pair
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define up upper_bound
#define low lower_bound
#define read(a, n) for (ll i = 0; i < n; ++i) cin >> a[i];
#define print(a, n) for (ll i = 0; i < n; ++i) { cout << a[i] << " "; } cout << "\n";
#define endl "\n"
#define sp " "
#define debug(x) cout << #x << "=" << x << endl;
// Typedefs
typedef long long ll;
typedef long double ld;
typedef long long int lli;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef vector<ll> vi;
using vec = vector<int>;
// POLICY BASED DATASTRUCTURES
using namespace __gnu_pbds;
template <typename T>
using ordered_set =
tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using ordered_multiset = tree<pair<int, int>, null_type, less<pair<int, int>>, rb_tree_tag, tree_order_statistics_node_update>;
// Constants
const ll mxn = 1e6 + 5;
const ll mod = 1e9 + 7;
const ll INF = 1e18 + 6;
// Function declarations
void bfs(ll start, const vector<vi> &adj, vi &dist);
void dfs(ll node, const vector<vi> &adj, vector<bool> &visited);
void dijkstra(ll start, const vector<vector<pll>> &adj, vector<ll> &dist);
int gcd(int a, int b);
int lcm(int a, int b);
int mod_add(int a, int b, int m = mod);
int mod_sub(int a, int b, int m = mod);
int mod_mul(int a, int b, int m = mod);
int mod_pow(int a, int b, int m = mod);
vector<ll> factors(ll n);
// Solve
void solve() {
int n;
cin>>n;
vector<string> a(n);
read(a, n);
sort(a.begin(), a.end(), [](const string &a, const string &b) {
if (a.size() == b.size()) {
return a < b;
}
return a.size() < b.size();
});
string st = "";
vector<char> op;
for(auto word:a){
int c = 0;
for( ; c<st.size() && c<word.size() && st[c] == wordp[c]; c++);
for(int i = st.size(); i>c; i--) op.pb('-');
for(int i = c; c<word.size(); i++) op.pb(word[i]);
op.pb('P');
st = word;
}
cout<<op.size()<<endl;
for(auto x:op) cout<<x<<endl;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t = 1;
// cin >> t;
while (t--) {
solve();
}
return 0;
}
// BFS
void bfs(ll start, const vector<vi> &adj, vi &dist) {
queue<ll> q;
q.push(start);
dist[start] = 0;
while (!q.empty()) {
ll node = q.front();
q.pop();
for (ll neighbor : adj[node]) {
if (dist[neighbor] == INF) {
dist[neighbor] = dist[node] + 1;
q.push(neighbor);
}
}
}
}
// DFS
void dfs(ll node, const vector<vi> &adj, vector<bool> &visited) {
visited[node] = true;
for (ll neighbor : adj[node]) {
if (!visited[neighbor]) {
dfs(neighbor, adj, visited);
}
}
}
// Dijkstra's Algorithm
void dijkstra(ll start, const vector<vector<pll>> &adj, vector<ll> &dist) {
priority_queue<pll, vector<pll>, greater<pll>> pq;
pq.push({0, start});
dist[start] = 0;
while (!pq.empty()) {
auto [d, node] = pq.top();
pq.pop();
if (d > dist[node])
continue;
for (auto [weight, neighbor] : adj[node]) {
if (dist[node] + weight < dist[neighbor]) {
dist[neighbor] = dist[node] + weight;
pq.push({dist[neighbor], neighbor});
}
}
}
}
// Segment Tree
struct SegmentTree {
int n;
vector<ll> tree;
SegmentTree(int size) : n(size) { tree.resize(4 * n, 0); }
void build(const vector<ll> &arr, int node, int start, int end) {
if (start == end) {
tree[node] = arr[start];
} else {
int mid = (start + end) / 2;
build(arr, 2 * node, start, mid);
build(arr, 2 * node + 1, mid + 1, end);
tree[node] = tree[2 * node] + tree[2 * node + 1];
}
}
void update(int node, int start, int end, int idx, ll val) {
if (start == end) {
tree[node] = val;
} else {
int mid = (start + end) / 2;
if (start <= idx && idx <= mid) {
update(2 * node, start, mid, idx, val);
} else {
update(2 * node + 1, mid + 1, end, idx, val);
}
tree[node] = tree[2 * node] + tree[2 * node + 1];
}
}
ll query(int node, int start, int end, int l, int r) {
if (r < start || end < l)
return 0;
if (l <= start && end <= r)
return tree[node];
int mid = (start + end) / 2;
ll left_sum = query(2 * node, start, mid, l, r);
ll right_sum = query(2 * node + 1, mid + 1, end, l, r);
return left_sum + right_sum;
}
void update(int idx, ll val) { update(1, 0, n - 1, idx, val); }
ll query(int l, int r) { return query(1, 0, n - 1, l, r); }
};
int gcd(int a, int b) { return b == 0 ? a : gcd(b, a % b); }
int lcm(int a, int b) { return (a / gcd(a, b)) * b; }
int mod_add(int a, int b, int m) { return (a % m + b % m) % m; }
int mod_sub(int a, int b, int m) { return (a % m - b % m + m) % m; }
int mod_mul(int a, int b, int m) { return (a % m * b % m) % m; }
int mod_pow(int a, int b, int m) {
int res = 1;
while (b > 0) {
if (b & 1)
res = mod_mul(res, a, m);
a = mod_mul(a, a, m);
b >>= 1;
}
return res;
}
vector<ll> factors(ll n) {
vector<ll> result;
for (ll i = 1; i * i <= n; ++i) {
if (n % i == 0) {
result.pb(i);
if (i != n / i)
result.pb(n / i);
}
}
sort(all(result));
return result;
}
// Sparse Table for Range Minimum Query (RMQ)
struct SparseTable {
int n, maxLog;
vector<vector<int>> table;
SparseTable(const vector<int> &arr) {
n = arr.size();
maxLog = log2(n) + 1;
table.assign(n, vector<int>(maxLog));
// Initialize table with the input array for the 0th power of 2
for (int i = 0; i < n; i++) {
table[i][0] = arr[i];
}
// Build the table
for (int j = 1; j < maxLog; j++) {
for (int i = 0; i + (1 << j) <= n; i++) {
table[i][j] = min(table[i][j - 1], table[i + (1 << (j - 1))][j - 1]);
}
}
}
// Query for the minimum in range [L, R]
int query(int L, int R) {
int j = log2(R - L + 1);
return min(table[L][j], table[R - (1 << j) + 1][j]);
}
};
Compilation message
printer.cpp: In function 'void solve()':
printer.cpp:72:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
72 | for( ; c<st.size() && c<word.size() && st[c] == wordp[c]; c++);
| ~^~~~~~~~~~
printer.cpp:72:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
72 | for( ; c<st.size() && c<word.size() && st[c] == wordp[c]; c++);
| ~^~~~~~~~~~~~
printer.cpp:72:57: error: 'wordp' was not declared in this scope; did you mean 'word'?
72 | for( ; c<st.size() && c<word.size() && st[c] == wordp[c]; c++);
| ^~~~~
| word
printer.cpp:74:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
74 | for(int i = c; c<word.size(); i++) op.pb(word[i]);
| ~^~~~~~~~~~~~
