Submission #74683

#	Time	Username	Problem	Language	Result	Execution time	Memory
74683		PeppaPig	Type Printer (IOI08_printer)	C++14	30 / 100	169 ms	52468 KiB

printer

#include <bits/stdc++.h>

#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 5e5+5;

int n, ptr, cnt;
int t[N][30], sub[N], w[N], h[N], c[N];
bitset<N> leaf;
vector<char> C;

int subSize(int u) {
	sub[u] = 1;
	for(int i = 0; i < 26; i++) {
		int v = t[u][i];
		if(!v) continue;
		sub[u] += subSize(v);
		if(sub[v] > w[u]) {
			w[u] = sub[v];
			h[u] = v;
			c[u] = i;
		}
	}
	return sub[u];
}

void dfs(int u) {
	if(leaf[u]) C.emplace_back('P');
	for(int i = 0; i < 26; i++) {
		int v = t[u][i];
		if(!v || v == h[u]) continue;
		C.emplace_back('a'+i);
		dfs(v);
	}
	if(h[u]) {
		C.emplace_back('a'+c[u]);
		dfs(h[u]);
	}
	C.emplace_back('-');
}

int main() {
	scanf("%d", &n);
	for(int i = 1; i <= n; i++) {
		char A[25];
		scanf(" %s", A+1);
		int cptr = 0;
		for(int i = 1; i <= strlen(A+1); i++) {
			int &pos = t[cptr][A[i]-'a'];
			if(!pos) pos = ++ptr;
			cptr = pos;
		}
		leaf[cptr] = 1;
	}
	subSize(0);
	/*for(int i = 0; i <= ptr; i++) printf("%c ", 'a'+hv[i].y);
	printf("\n");
	for(int i = 0; i <= ptr; i++) {
		for(int j = 0; j < 26; j++) {
			if(t[i][j]) printf("%c ", 'a'+j);
			else printf("- ");
		}
		printf("\n");
	}*/
	dfs(0);
	while(!C.empty() && C.back() == '-') C.pop_back();
	printf("%d\n", C.size());
	for(char c : C) printf("%c\n", c);

	return 0;
}

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 1; i <= strlen(A+1); i++) {
                  ~~^~~~~~~~~~~~~~
printer.cpp:71:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<char>::size_type {aka long unsigned int}' [-Wformat=]
  printf("%d\n", C.size());
                 ~~~~~~~~^
printer.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
printer.cpp:50:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %s", A+1);
   ~~~~~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10