#include "train.h"
#include<bits/stdc++.h>
using namespace std;
const int MAXN = 5e3 + 10;
int n;
int marc[MAXN];
int pode[MAXN];
int bom[MAXN];
vector<int> ar[MAXN];
vector<int> rev[MAXN];
bool haveCycle(int cur, int ori){
marc[cur] = 1;
for(int i = 0; i < ar[cur].size(); i++){
int viz = ar[cur][i];
if(viz == ori) return true;
if(marc[viz]) continue;
if(pode[viz]) continue;
if(haveCycle(viz, ori)) return true;
}
return false;
}
bool dfs(int cur){
marc[cur] = 1;
for(int i = 0; i < rev[cur].size(); i++){
int viz = rev[cur][i];
if(marc[viz]) continue;
dfs(viz);
}
}
vector<int> sub1(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v){
vector<int> w(n, 0);
for(int i = n - 1; i >= 0; i--){
if(ar[i].size() == 2){
if(a[i]){
if(r[i]) w[i] = 1;
else w[i] = w[i + 1];
}
else{
if(r[i]) w[i] = w[i + 1];
else w[i] = 0;
}
}
else if(ar[i][0] == i) w[i] = r[i];
else w[i] = w[i + 1];
}
return w;
}
vector<int> sub2(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v){
vector<int> w(n, 0);
return w;
}
vector<int> sub3(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v){
vector<int> w(n, 0);
for(int i = 0; i < n; i++){
if(!r[i]) continue;
for(int j = 0; j < n; j++)
marc[j] = 0;
bom[i] = haveCycle(i, i);
}
for(int j = 0; j < n; j++)
marc[j] = 0;
for(int i = 0; i < n; i++)
if(bom[i]) dfs(i);
for(int i = 0; i < n; i++)
w[i] = !marc[i];
return w;
}
vector<int> sub4(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v){
vector<int> w(n, 0);
for(int j = 0; j < n; j++)
pode[j] = r[j];
for(int i = 0; i < n; i++){
if(r[i]) continue;
for(int j = 0; j < n; j++)
marc[j] = 0;
bom[i] = haveCycle(i, i);
}
for(int j = 0; j < n; j++)
marc[j] = 0;
for(int i = 0; i < n; i++)
if(bom[i]) dfs(i);
for(int i = 0; i < n; i++)
w[i] = marc[i];
return w;
}
vector<int> sub5(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v){
return w;
}
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
n = a.size();
for(int i = 0; i < u.size(); i++){
ar[u[i]].push_back(v[i]);
rev[v[i]].push_back(u[i]);
}
// if(n <= 15) return sub2(a, r, u, v);
bool flag = true;
for(int i = 0; i < n; i++)
flag &= a[i];
if(flag) return sub3(a, r, u, v);
flag = true;
for(int i = 0; i < n; i++)
flag &= !a[i];
if(flag) return sub4(a, r, u, v);
int cnt = 0;
for(int i = 0; i < n; i++)
cnt += r[i];
// if(cnt == 1) return sub5(a, r, u, v);
return sub1(a, r, u, v);
}
Compilation message
train.cpp: In function 'bool haveCycle(int, int)':
train.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for(int i = 0; i < ar[cur].size(); i++){
| ~~^~~~~~~~~~~~~~~~
train.cpp: In function 'bool dfs(int)':
train.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for(int i = 0; i < rev[cur].size(); i++){
| ~~^~~~~~~~~~~~~~~~~
train.cpp:35:1: warning: no return statement in function returning non-void [-Wreturn-type]
35 | }
| ^
train.cpp: In function 'std::vector<int> sub5(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:99:9: error: 'w' was not declared in this scope
99 | return w;
| ^
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:105:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
105 | for(int i = 0; i < u.size(); i++){
| ~~^~~~~~~~~~
