Submission #1076334

#	Time	Username	Problem	Language	Result	Execution time	Memory
1076334		ArthuroWich	Tropical Garden (IOI11_garden)	C++17	49 / 100	23 ms	11856 KiB

garden

#include "garden.h"
#include "gardenlib.h"
#include<bits/stdc++.h>
using namespace std;
int n, m, P, k, ans = 0;
vector<int> adj[150005];
int succ[300005][20];
void initsucc() {
    for (int j = 1; j < 20; j++) {
        for (int i = 0; i < 2*n; i++) {
            succ[i][j] = succ[succ[i][j-1]][j-1];
        }
    }
}
void calc(int a) {
    for (int i = 0; i < 20; i++) {
        if (k & (1 << i)) {
            a = succ[a][i];
        }
    }
    if (a == P || a == P+n) {
        ans++;
    }
}
void count_routes(int N, int M, int pp, int R[][2], int Q, int G[]) {
    n = N, m = M, P = pp;
    for (int i = 0; i < m; i++) {
        if (adj[R[i][0]].size() < 2) {
            adj[R[i][0]].push_back(R[i][1]);
        }
        if (adj[R[i][1]].size() < 2) {
            adj[R[i][1]].push_back(R[i][0]);
        }
    }
    for (int i = 0; i < n; i++) {
        if (adj[i].size() == 1) {
            if (i == adj[adj[i][0]][0]) {
                succ[i][0] = adj[i][0]+n;
            } else {
                succ[i][0] = adj[i][0];
            }
            succ[i+n][0] = succ[i][0];
        } else {
            if (i == adj[adj[i][0]][0]) {
                succ[i][0] = adj[i][0]+n;
            } else {
                succ[i][0] = adj[i][0];
            }
            if (i == adj[adj[i][1]][0]) {
                succ[i+n][0] = adj[i][1]+n;
            } else {
                succ[i+n][0] = adj[i][1];
            }
        }
    }
    initsucc();
    for (int j = 0; j < Q; j++) {
        k = G[j];
        ans = 0;
        for (int i = 0; i < n; i++) {
            calc(i);
        }
        answer(ans);
    }
}

• Subtask 1: 49 / 49
• Subtask 2: 0 / 20
• Subtask 3: 0 / 31