Submission #504870

#	Time	Username	Problem	Language	Result	Execution time	Memory
504870		Mike4235	Speedrun (RMI21_speedrun)	C++17	100 / 100	158 ms	932 KiB

speedrun

/*#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")*/
 
#include <bits/stdc++.h>
#include "speedrun.h"
  
#define for1(i,a,b) for (int i = a; i <= b; i++)
#define for2(i,a,b) for (int i = a; i >= b; i--)
// #define int long long

#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pb push_back
 
/*
__builtin_popcountll(x) : Number of 1-bit
__builtin_ctzll(x) : Number of trailing 0
*/
 
const long double PI = 3.1415926535897932384626433832795;
// const int INF = 1000000000000000000;
const int MOD = 1000000007;
const int MOD2 = 1000000009;
const long double EPS = 1e-6;

using namespace std;

int now, tin[1005], rev[1005];
vector<int> g[1005];

void dfs(int u, int p) {
	for1(i,0,9) if (p & (1 << i)) setHint(u, i + 1, 1);
	tin[u] = ++now;
	rev[now] = u;
	for (auto v : g[u]) if (v != p) dfs(v, u);
}

void assignHints(int subtask, int n, int a[], int b[]) {
	setHintLen(20);

	for1(i,1,n - 1) {
		g[a[i]].push_back(b[i]);
		g[b[i]].push_back(a[i]);
	}

	dfs(1, 0);
	for1(u,1,n) {
		for1(i,0,9) if (rev[tin[u] + 1] & (1 << i)) setHint(u, i + 11, 1);
	}
	return;
}

int get(int p) {
	int res = 0;
	for1(i,0,9) {
		bool t = getHint(i + 1 + p * 10);
		res ^= (t << i);
	} 
	return res;
}

void speedrun(int subtask, int n, int u) {
	int l = getLength();
	while (1) {
		int v = get(0);
		if (!v) break;
		goTo(v);
		u = v;
	}

	int flag = 1, cur = get(1);
	while (1) {
		if (!flag) {
			cur = get(1);
			flag = 1;
		}
		if (!cur) return;
		if (goTo(cur)) {
			u = cur;
			flag = 0;
		}
		else {
			int v = get(0);
			goTo(v);
			u = v;
		}
	}
}

Compilation message (stderr)

speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:64:6: warning: unused variable 'l' [-Wunused-variable]
   64 |  int l = getLength();
      |      ^

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