Submission #124077

#	Time	Username	Problem	Language	Result	Execution time	Memory
124077		amiratou	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	417 ms	262148 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<ii> >
#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];
        for (int j = B[i],z=0; j < N; j+=P[i],z++)
        {
            //debug(j);
            vec[B[i]].pb({j,z});
            //vec[j].pb({B[i],z});
        }
        for (int j = B[i]-P[i],z=1; j >=0 ; j-=P[i],z++)
        {
            //debug(j);
            vec[B[i]].pb({j,z});
            //vec[j].pb({B[i],z});
        }
        //sep()
    }
    for (int i = 0; i < N; ++i)
        dist[i]=INF;
    dist[B[0]]=0;
    priority_queue<ii,vii,greater<ii> > pq;
    pq.push({0,B[0]});
    while(!pq.empty()){
        ii front=pq.top();
        //debugii(front);
        pq.pop();
        if(dist[front.se]<front.fi)continue;
        for(auto it:vec[front.se]){
            if(dist[it.fi]>dist[front.se]+it.se){
                dist[it.fi]=dist[front.se]+it.se;
                pq.push({dist[it.fi],it.fi});
            }
        }
    }
    if(dist[B[1]]==INF)cout<<-1;
    else cout<<dist[B[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