Submission #738477

#	Time	Username	Problem	Language	Result	Execution time	Memory
738477		Vanilla	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	1 ms	1036 KiB

skyscraper

#include <bits/stdc++.h>
#include <fstream>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
struct custom_hash {static uint64_t splitmix64(uint64_t x) {x += 0x9e3779b97f4a7c15;x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;x = (x ^ (x >> 27)) * 0x94d049bb133111eb;return x ^ (x >> 31);}size_t operator()(uint64_t x) const {static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();return splitmix64(x + FIXED_RANDOM);}};
// string __fname = ""; ifstream in (__fname + ".in"); ofstream out (__fname + ".out"); 
// #define cin in 
// #define cout out
#define int64 long long
#define uint64 unsigned long long
#define x first
#define y second
#define pb push_back
#define pii pair <int, int> 
#define pii64 pair <int64, int64>
#define db(x) cout << "> " << #x << ": " << (x) << "\n"
#define qr queries()
#define yn(x) if (x) {ctn("Yes");}else {ctn("No");}
void solve(int);
void queries(){int n;cin >> n;for (int i = 1; i <= n; i++) solve(i);}
template<class T>T ceildiv(T a, T b) {return a / b + !!(a % b);}
template<class T>T gcd (T a, T b){return (b ? gcd(b, a % b): a);}
template<class T>T lcm (T a, T b){return a * b / gcd(a, b);}
// // // // // // // // // // // // // // // // // // // // // // 
/*                  TEMPLATE - VANILLA                         */
// // // // // // // // // // // // // // // // // // // // // //
const int ddx[] = {-1, -1, 0, 1, 1, 1, 0, -1};
const int ddy[] = {0, 1, 1, 1, 0, -1, -1, -1};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
const double pi = 3.14159265359;
const double eps = 1e-6;
const int64 hash_inv = 940594066;
const int64 hash_p = 101;
const int64 mod = 1e9 + 7;
const int maxn = 3e4 + 1;
bitset <maxn> vis [maxn];
vector <int> ad [maxn];

void solve(int id){
    
    return;
}


int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed; cout << setprecision(10); 
    int n,m, start= 0, end= 0;
    cin >> n >> m;
    for (int i = 0; i < m; i++){
        int x,y;
        cin >> x >> y;
        if (x + y < n) ad[x].push_back(y);
        if (x - y >= 0) ad[x].push_back(-y);
        if (i == 0) start = x;
        if (i == 1) end = x;
    }
    queue <array <int, 3> > q;
    q.push({start, 0, 0});
    while (!q.empty()) {
        auto [pos, jump, dist] = q.front();
        // cerr << pos << " " << jump << " " << dist << "\n";
        q.pop();
        if (pos == end) {
            cout << dist;
            return 0;
        }
        if (jump && pos + jump >= 0 && pos + jump < n && !vis[pos][pos + jump]) {
            vis[pos][pos + jump] = 1;
            q.push({pos + jump, jump, dist + 1});
        }
        for (int njump: ad[pos]) {
            if (vis[pos][pos + njump]) continue;
            vis[pos][pos + njump] = 1;
            q.push({pos + njump, njump, dist + 1});
        }
    }
    return 0;
}

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