Submission #243127

#	Time	Username	Problem	Language	Result	Execution time	Memory
243127		crossing0ver	Toy Train (IOI17_train)	C++17	0 / 100	17 ms	1408 KiB

train

#include<bits/stdc++.h>
#define vi vector<int>
#define pb push_back
//#include "train.h"
using namespace std;
int n,m;
vi X,Y,good,who,adj[5009];

vi CASE1() {
	vi ans(n);
	ans[n-1] = good[n-1];
	for (int i = n-2; i >= 0; i--) {
		bool flag = 0;
		for (int j : adj[i]) {
			if (j == i && who[i] == good[i]) {
				ans[j] = who[i];
				flag = 1;
				break;
			}
			if (who[i] && ans[j]) {
				ans[i] = flag = 1;
				break;
			}
			if (!who[i] && !ans[j]) {
				flag = 1;
				break;
			}
		}
		if (flag == 0) ans[i] = !who[i];
	}
	return ans;
}
vi who_wins(vi a1, vi r, vi st, vi en) {
	n = a1.size(), m = st.size();
	X = st; Y = en;
	for (int i = 0; i < m; i++)
		adj[X[i]].pb(Y[i]);
	good = r;
	who = a1;
	bool case1 = 1;
	for (int i = 0; i < m; i++) {
		if (X[i] != Y[i] && X[i]+1 != Y[i])
			case1 = 0;
	}
	if (case1) return CASE1();	
//	return res;
}

Compilation message (stderr)

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:47:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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