Submission #869260

#	Time	Username	Problem	Language	Result	Execution time	Memory
869260		MinaRagy06	Speedrun (RMI21_speedrun)	C++17	0 / 100	1 ms	536 KiB

speedrun

#include <bits/stdc++.h>
#ifdef MINA
#include "grader.cpp"
#endif
#include "speedrun.h"
using namespace std;
typedef int64_t ll;

// {child, next, prev, par}
bool get(int vals[4]) {
	if (~vals[0]) return 1;
	for (int j = 0; j < 4; j++) {
		vals[j] = 0;
		for (int b = 0; b < 10; b++) {
			if (getHint(10 * j + b + 1)) {
				vals[j] |= 1 << b;
			}
		}
	}
	return 1;
}
void assign(int i, int vals[4]) {
	for (int j = 0; j < 4; j++) {
		for (int b = 0; b < 10; b++) {
			if ((vals[j] >> b) & 1) {
				setHint(i, 10 * j + b + 1, 1);
			}
		}
	}
}
// {child, prev, nxt, par}
void dfs(int i, int par, int prv, int nxt, vector<int> adj[], int vals[][4]) {
	vals[i][0] = 0;
	vals[i][1] = prv;
	vals[i][2] = nxt;
	vals[i][3] = par;
	for (int j = 0; j < adj[i].size(); j++) {
		if (adj[i][j] == par) continue;
		vals[i][0] = adj[i][j];
		int newpar = i;
		int newprv = 0;
		int newnxt = 0;
		for (int k = j - 1; k >= 0; k--) {
			if (adj[i][k] == par) continue;
			newprv = adj[i][k];
			break;
		}
		for (int k = j + 1; k < adj[i].size(); k++) {
			if (adj[i][k] == par) continue;
			newnxt = adj[i][k];
			break;
		}
		dfs(adj[i][j], newpar, newprv, newnxt, adj, vals);
	}
}
void assignHints(int subtask, int n, int a[], int b[]) {
	vector<int> adj[n + 1];
	for (int i = 1; i < n; i++) {
		adj[a[i]].push_back(b[i]);
		adj[b[i]].push_back(a[i]);
	}
	setHintLen(40);
	int vals[n + 1][4];
	memset(vals, -1, sizeof vals);
	dfs(1, 0, 0, 0, adj, vals);
	for (int i = 1; i <= n; i++) {
		for (int j = 0; j < 4; j++) {
			cout << vals[i][j] << ' ';
		}
		cout << '\n';
		assign(i, vals[i]);
	}
}
// {child, next, prev, par}
void dfs(int i, int vals[][4]) {
	while (1) {
		get(vals[i]);
		if (vals[i][0]) {
			goTo(vals[i][0]);
			dfs(vals[i][0], vals);
		}
		if (vals[i][1]) {
			goTo(vals[i][3]);
			goTo(vals[i][1]);
			i = vals[i][1];
		} else {
			break;
		}
	}
	get(vals[i]);
	if (vals[i][3]) goTo(vals[i][3]);
}
void speedrun(int subtask, int n, int start) {
	int vals[n + 1][4];
	memset(vals, -1, sizeof vals);
	int cur = start;
	while (get(vals[cur]) && vals[cur][3]) {
		cur = vals[cur][3];
		goTo(cur);
	}
	assert(cur == 1);
	dfs(cur, vals);
}

Compilation message (stderr)

speedrun.cpp: In function 'void dfs(int, int, int, int, std::vector<int>*, int (*)[4])':
speedrun.cpp:37:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for (int j = 0; j < adj[i].size(); j++) {
      |                  ~~^~~~~~~~~~~~~~~
speedrun.cpp:48:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   for (int k = j + 1; k < adj[i].size(); k++) {
      |                       ~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 21
• Subtask 2: 0 / 8
• Subtask 3: 0 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40