Submission #33538

#	Time	Username	Problem	Language	Result	Execution time	Memory
33538		mohammad_kilani	Toy Train (IOI17_train)	C++14	0 / 100	2000 ms	210960 KiB

train

#include <bits/stdc++.h>
#include "train.h"
using namespace std;
const int N = 5010;
int n ;
bitset< N > dp[N] , vis[N];
vector<int> a, r;
vector<int> g[N];
bool solve(int i,int j){
	if(r[i]) j = n;
	if(j == 0) return 0;
	if(vis[i][j]) return dp[i][j];
	vis[i][j] = 1;
	dp[i][j] = 1;
	if(r[i]){
		for(int k=0;k<g[i].size();k++){
			int node = g[i][k];
			if(solve(node,j-1) == 0) dp[i][j] = 0;
		}
	}
	else{
		bool can = false;
		for(int k=0;k<g[i].size();k++){
			int node = g[i][k];
			if(solve(node,j-1) == 1) can = true;
		}
		dp[i][j] = can;
	}
	return dp[i][j];
}


std::vector<int> who_wins(std::vector<int> A, std::vector<int> R, std::vector<int> u, std::vector<int> v) {
	vector<int> ans;
	a = A;
	r = R;;
	n = a.size();
	for(int i=0;i<u.size();i++) g[u[i]].push_back(v[i]);
	memset(dp,-1,sizeof(dp));
	for(int i=0;i<n;i++) ans.push_back(solve(i,n));
	return ans;
}

Compilation message (stderr)

train.cpp: In function 'bool solve(int, int)':
train.cpp:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0;k<g[i].size();k++){
                ^
train.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0;k<g[i].size();k++){
                ^
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:38:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<u.size();i++) g[u[i]].push_back(v[i]);
               ^

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