Submission #390046

#	Time	Username	Problem	Language	Result	Execution time	Memory
390046		AriaH	Type Printer (IOI08_printer)	C++11	100 / 100	166 ms	53372 KiB

printer

/** I can do this all day **/

#pragma GCC optimize("O2")
#include <bits/stdc++.h>
using namespace std;

typedef long long                   ll;
typedef long double                 ld;
typedef pair<int,int>               pii;
typedef pair<ll,ll>                 pll;
#define all(x)                      (x).begin(),(x).end()
#define F                           first
#define S                           second
#define Mp                          make_pair
#define SZ(x)			    		(int)x.size()
#define fast_io                     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io                     freopen("in.txt" , "r+" , stdin) ; freopen("out.txt" , "w+" , stdout);

const int N = 5e5 + 10;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ll inf = 8e18;
const int LOG = 22;
const int sigma = 26;

ll pw(ll a , ll b, ll M)  { return (!b ? 1 : (b & 1 ? (a * pw(a * a % M, b / 2, M)) % M : pw(a * a % M, b / 2, M))); }

char C[N];

int n, ts, node, H[N], End[N], nxt[sigma][N], par[N], mark[N];

string out;

void dfs(int v)
{
	if(End[v])
	{
		out += "P";
	}
	for(int i = 0; i < sigma; i ++)
	{
		if(nxt[i][v] == 0 || mark[nxt[i][v]]) continue;
		out += string(1, 'a' + i);
		dfs(nxt[i][v]);
		out += "-";
	}
	if(mark[v])
	{
		for(int i = 0; i < sigma; i ++)
		{
			if(nxt[i][v] && mark[nxt[i][v]])
			{
				out += string(1, 'a' + i);
				dfs(nxt[i][v]);
			}
		}
	}
}

int main()
{
	scanf("%d", &n);
	for(int i = 1; i <= n; i ++)
	{
		scanf("%s", C);
		string s = C;
		int v = 0;
		for(int j = 0; j < SZ(s); j ++)
		{
			int ch = s[j] - 'a';
			if(!nxt[ch][v]) nxt[ch][v] = ++ ts;
			H[nxt[ch][v]] = H[v] + 1;
			par[nxt[ch][v]] = v;
			v = nxt[ch][v];
		}
		End[v] ++;
		if(H[v] > H[node]) node = v;
		///printf("i = %d H = %d v = %d node = %d\n", i, H[v], v, node);
	}
	while(node)
	{
		///printf("marking node = %d\n", node);
		mark[node] = 1;
		node = par[node];
	}
	mark[0] = 1;
	dfs(0);
	printf("%d\n", SZ(out));
	for(int i = 0; i < SZ(out); i ++)
	{
	    printf("%c\n", out[i]);
	}
	return 0;
}

/** test corner cases(n = 1?) watch for overflow or minus indices **/

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:62:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   62 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
printer.cpp:65:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |   scanf("%s", C);
      |   ~~~~~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10