Submission #124049

#	Time	Username	Problem	Language	Result	Execution time	Memory
124049		amiratou	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	1073 ms	3820 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define fi first
#define se second
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define debugii(x) cerr << " - " << #x << ": " << x.fi<<","<<x.se << endl;
#define sep() cerr << "--------------------" << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define ll long long
#define int ll
#define ii pair<int,int>
#define v vector<int>
#define vii vector<ii>
#define vv vector<vector<int> >
#define mp make_pair
#define INF 100000000000
#define pb push_back
#define EPS 1e-9
const int MOD = 1000000007; // 998244353
int B[300005],P[300005];
int dist[300005];
vv vec;
main(){
    boost;
    int N,M;
    cin>>N>>M;
    vec.resize(N);
    for (int i = 0; i < M; ++i){
        cin>>B[i]>>P[i];
        vec[B[i]].pb(i);
        dist[i]=INF;
    }
    priority_queue<ii,vii,greater<ii> > pq;
    pq.push({0,0});
    dist[0]=0;
    while(!pq.empty()){
        ii front=pq.top();
        pq.pop();
        if(dist[front.se]<front.fi)continue;
        for (int i = B[front.se],j=0; i < N; i+=P[front.se],j++)
        {
            for(auto it:vec[i]){
                if(dist[it]>(dist[front.se]+j)){
                    dist[it]=dist[front.se]+j;
                    pq.push({dist[it],it});
                }
            }
        }
        for (int i = B[front.se]-P[front.se],j=1; i >= 0; i-=P[front.se],j++)
        {
            for(auto it:vec[i]){
                if(dist[it]>(dist[front.se]+j)){
                    dist[it]=dist[front.se]+j;
                    pq.push({dist[it],it});
                }
            }
        }
           
    }
    if(dist[1]==INF)cout<<-1;
    else cout<<dist[1];
    cout<<"\n";
    return 0;
}
//long long
//array bounds
//special cases
//binary search

Compilation message (stderr)

skyscraper.cpp:26:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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