Submission #1201602

#	Time	Username	Problem	Language	Result	Execution time	Memory
1201602		adiyer	Game (APIO22_game)	C++20	30 / 100	4056 ms	27080 KiB

game

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 5e5 + 11;

int n, k, ver;
int was[MAXN], r[MAXN], l[MAXN];

vector < int > g[MAXN], rg[MAXN];

void dfs(int v, int st){
    was[v] = 1;
    if(v != st) r[v] = max(r[v], st);
    for(int u : g[v]){
        if(!was[u]) dfs(u, st);
        else r[u] = max({r[v], r[u], st});
    }
}

void dfs2(int v, int st){
    was[v] = 1, l[v] = min(l[v], st);
    for(int u : rg[v])
        if(!was[u])
            dfs2(u, st);
}

void init(int _n, int _k) {
    n = _n, k = _k;
    for(int i = 0; i < k - 1; i++) g[i].push_back(i + 1), rg[i + 1].push_back(i);
}

int add_teleporter(int u, int v){
    g[u].push_back(v);
    for(int i = 0; i < n; i++) r[i] = -1, l[i] = n;
    for(int i = 0; i < n; i++) was[i] = 0;
    for(int i = k - 1; i >= 1; i--) dfs(i, i);
    for(int i = 0; i < n; i++) was[i] = 0;
    dfs(0, 0);
    for(int i = 0; i < n; i++) was[i] = 0;
    for(int i = 0; i < k; i++) dfs2(i, i);
    for(int i = 0; i < n; i++)
        if(l[i] <= r[i]) 
            return 1;
    return 0;
}

namespace {

int read_int() {
  int x;
  if (scanf("%d", &x) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  return x;
}

}  // namespace

• Subtask 1: 2 / 2
• Subtask 2: 10 / 10
• Subtask 3: 18 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40