Submission #1275700

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275700		beny	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	10 / 100	1 ms	832 KiB

skyscraper

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#pragma GCC optimize("O3")
#pragma GCC optimization("Ofast,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#define ll long long
//#define smid (nl + nr) / 2
//#define lc id * 2
//#define rc id * 2 + 1
#define migmig std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);std::cout.tie(NULL);
template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

const int N = 3005;
int dis1[N][N];

vector<int> doge[N];

void solve() {
    int n, m; cin >> n >> m;

    int bb, pp;
    for (int i = 0; i < m; i++) {
        int b, p; cin >> b >> p;
        doge[b].push_back(p);
        if (i == 1) {
            bb = b;
            pp = p;
        }
    }

    for (int i = 0; i <= n; i++) {
        for (int j = 0; j <= 2000; j++) {
            dis1[i][j] = -1;
        }
    }

    deque<pair<int, int>> q;
    for (int p : doge[0]) { dis1[0][p] = 0; q.push_back({ 0, p }); }
    while (!q.empty()) {
        int v = q.front().first;
        int p = q.front().second;
        q.pop_front();

        if (v - p >= 0) {
            if (dis1[v - p][p] == -1) {
                dis1[v - p][p] = dis1[v][p] + 1;
                q.push_back({ v - p, p });
            }
        }
        if (v + p < n) {
            if (dis1[v + p][p] == -1) {
                dis1[v + p][p] = dis1[v][p] + 1;
                q.push_back({ v + p, p });
            }
        }

        for (int pp : doge[v]) {
            if (dis1[v][pp] == -1) {
                dis1[v][pp] = dis1[v][p];
                q.push_front({ v, pp });
            }
        }
    }

    cout << dis1[bb][pp];
}

int main() {
    migmig;

    int T = 1;
    //cin >> T;
    while (T--) {
        solve();
    }
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43