Submission #882567

#	Time	Username	Problem	Language	Result	Execution time	Memory
882567		vjudge1	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	36 / 100	643 ms	262144 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int inf = 1e18 + 7;
const int M = 3e4;
struct cmp{
    bool operator()(array < int , 3 > const& a , array < int , 3 > const& b){
        return b[0] < a[0];
    }
};
void solve(){
    int n, m;
    cin >> n >> m;
    pair < int , int > doge[m];
    vector < int > root[M];
    for(int i = 0;i<m;i++){
        cin >> doge[i].first >> doge[i].second;
        root[doge[i].first].push_back(doge[i].second);
    }
    set < pair < int , int > > vis;//konum zıplayış
    priority_queue < array < int , 3 > , vector < array < int , 3 > > , cmp > pq;//dist , konum , zıplayış
    pq.push({0,doge[0].first,0});
    while(pq.size()){
        array < int , 3 > tmp = pq.top();
        pq.pop();
        if(tmp[1] < 0 or tmp[1] >= n or vis.count({tmp[1],tmp[2]})){
            //cout << "rejected : " << tmp[0] << " " << tmp[1] << " " << tmp[2] << " because " << (tmp[1] < 0) << (tmp[1] >= n) << vis.count({tmp[1],tmp[2]}) <<endl;
            continue;
        }
        //cout << tmp[0] << " " << tmp[1] << " " << tmp[2] << endl;
        if(tmp[1] == doge[1].first){
            cout << tmp[0] << endl;
            return;
        }
        vis.insert({tmp[1],tmp[2]});
        pq.push({tmp[0] + 1 , tmp[1] + tmp[2] , tmp[2]});
        //cout << "-> " << tmp[0] + 1 << " " << tmp[1] + tmp[2] << " " << tmp[2] << endl;
        pq.push({tmp[0] + 1 , tmp[1] - tmp[2] , tmp[2]});
        //cout << "-> " << tmp[0] + 1 << " " << tmp[1] - tmp[2] << " " << tmp[2] << endl;
        for(auto itr : root[tmp[1]]){
            pq.push({tmp[0] + 1 , tmp[1] + itr , itr});
            //cout << "-> " << tmp[0] + 1 << " " << tmp[1] + itr << " " << itr << endl;
            pq.push({tmp[0] + 1 , tmp[1] - itr , itr});
            //cout << "-> " << tmp[0] + 1 << " " << tmp[1] - itr << " " << itr << endl;
        }
    }
    cout << -1 << endl;
}
signed main(){  
    ios_base::sync_with_stdio(0);cin.tie(0);
    int testcase = 1;//cin >> testcase;
    while(testcase--)solve();
}

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