Submission #593826

#	Time	Username	Problem	Language	Result	Execution time	Memory
593826		FatihSolak	Toy Train (IOI17_train)	C++17	0 / 100	126 ms	2204 KiB

train

#include "train.h"
#include <bits/stdc++.h>
#define N 15
using namespace std;
int dp[(1<<N)][N];
bool edge[N][N];
bool special[N];
vector<int> adj[N];
vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
	int n = a.size();
	int m = u.size();
	for(int i=0;i<m;i++){
		edge[u[i]][v[i]] = 1;
		adj[u[i]].push_back(v[i]);
	}
	for(int i = 0;i<n;i++){
		if(r[i]){
			for(int mask = (1<<n)-1;mask>=0;mask--){
				for(int j = 0;j<n;j++){
					if(!(mask & (1<<j)))continue;
					if(a[j]){
						dp[mask][j] = 0;
						for(auto u:adj[j]){
							if((mask & (1<<u))){
								dp[mask][j] |= (u == i);
								continue;
							}
							dp[mask][j] |= dp[mask + (1<<u)][u];
						}
					}
					else{
						dp[mask][j] = 1;
						for(auto u:adj[j]){
							if((mask & (1<<u))){
								dp[mask][j] &= (u == i);
								continue;
							}
							dp[mask][j] &= dp[mask + (1<<u)][u];
						}
					}
					//cout << mask << " " << j << " " << dp[mask][j] << endl;
				}
			}
			special[i] = dp[(1<<i)][i];
			//cout << i << " " << special[i] << endl;
		}
	}
	vector<int> res(n);
	for(int i = 0; i < n; i++){
		for(int mask = (1<<n)-1;mask>=0;mask--){
			bool x = 0;
			for(int c = 0;c<n;c++){
				if(mask & (1<<c))
					x |= special[c];
			}
			for(int j = 0;j<n;j++){
				if(!(mask & (1<<j)))continue;
				dp[mask][j] = 0;	
				if(a[j]){
					for(auto u:adj[j]){
						if((mask & (1<<u))){
							continue;
						}
						dp[mask][j] |= dp[mask + (1<<u)][u];
					}
				}
				else{
					dp[mask][j] = 1;
					for(auto u:adj[j]){
						if((mask & (1<<u))){
							dp[mask][j] = 0;
							continue;
						}
						dp[mask][j] &= dp[mask + (1<<u)][u];
					}
				}
				dp[mask][j] |= x;
			}
		}
		res[i] = dp[(1<<i)][i];
	}
	return res;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51