Submission #835269

#	Time	Username	Problem	Language	Result	Execution time	Memory
835269		unnick	Game (IOI14_game)	C++14	15 / 100	1 ms	464 KiB

game

#include "game.h"
#include <iostream>
#include <vector>
#include <numeric>

using namespace std;

vector<int> free_e;
vector<short> free_c;
vector<char> edges;
int n;

void initialize(int n_) {
    n = n_;
    free_c.resize(n,n-1);
    free_e.resize(n,(n)*(n-1)/2);
    for (int i = 0; i < n; i++) free_e[i] -= i;
    edges.resize(n*n, 0);
}

void dc(int x, int y) {
    while (true) {
        free_e[x] -= y;
        if (--free_c[x] != 1) return;
        y = x;
        x = free_e[x];
        edges[max(x,y)+min(x,y)*n] = 1;
    }
}

int hasEdge(int u, int v) {
    if (edges[max(u,v)+min(u,v)*n]) return true;
    free_e[v] -= u;
    free_c[v]--;
    dc(u,v);
    free_c[v]++;
    free_e[v] += u;
    dc(v,u);
    return false;
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 27
• Subtask 3: 0 / 58