이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "coprobber.h"
#ifndef EVAL
#include "grader.cpp"
#endif
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
#define long unsigned long
#define pb push_back
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define lb lower_bound
#define ub upper_bound
#define sz(v) int((v).size())
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl '\n'
#define PI 2*acos(0.0)
const int MAXN = 503;
int n;
vector <int> graph[MAXN];
int dist[MAXN][MAXN];
int color[MAXN];
int flag = 0;
int cop = 0, last = 0;
//~ int grundy[MAXN][MAXN][2]; // cop, robber, whose move
void bfs(int v) {
for (int i = 0; i < n; i++) dist[v][i] = 2e9;
dist[v][v] = 0;
queue <int> K;
K.push(v);
while (sz(K)) {
auto u = K.front(); K.pop();
for (auto to : graph[u]) {
if (dist[v][to] > dist[v][u] + 1) {
dist[v][to] = dist[v][u] + 1;
K.push(to);
}
}
}
}
void dfs(int v = 0, int c = 1) {
color[v] = c;
for (auto to : graph[v]) {
if (color[to]) {
if (color[to] == color[v]) {
flag = -1;
}
}
else {
dfs(to, 3 - c);
}
}
}
int start(int N, bool A[MAX_N][MAX_N]) {
n = N;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (A[i][j]) {
graph[i].pb(j);
}
}
}
for (int i = 0; i < n; i++) {
bfs(i);
}
dfs();
return flag;
}
int nextMove(int R) {
if (color[cop] == color[R]) return cop;
int mn = 2e9, ind = -1;
for (auto to : graph[cop]) {
if (dist[R][to] < mn && last != to) {
mn = dist[R][to];
ind = to;
}
}
last = cop;
cop = ind;
return cop;
}
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