Submission #738706

#	Time	Username	Problem	Language	Result	Execution time	Memory
738706		Mauve	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	291 ms	262144 KiB

skyscraper

#include<bits/stdc++.h>
using namespace std;
#define ll int
#define ss second
#define ff first
#define INF 2000000000000000
#define pb push_back
#define edge pair<ll, pair<ll,ll> > // une, number ,power
#define cost first
#define num second.first
#define pwr second.second
ll n,m,l,r,i,j,ii,jj,k,x,y,D[30005][180],s,e;
vector< edge > v[30005][180]; // number , power (powergu oroi bol power = 179)
int main(){
    cin.tie(nullptr);
    cout.tie(nullptr);
    ios::sync_with_stdio(false);
    cin>>n>>m;
    for(i=1;i<=m;i++){
        cin>>l>>r;
        if(i==1) s=l;
        if(i==2) e=l;
        if(r>175)
            for(j=1 ; l+r*j<n || l-r*j>=0 ; j++){
                edge a;
                a.num=l+r*j;
                a.pwr=179;
                a.cost=j;
                if(a.num<n) v[l][179].pb(a);
                a.num=l-r*j;
                if(a.num>=0) v[l][179].pb(a);
            }
        else{
            v[l][179].pb({0,{l,r}});
        }
    }
    for(i=1;i<=175;i++)
       for(j=0;j<n;j++){
            v[j][i].pb({0,{j,179}});
            if(j+i<n) v[j][i].pb({1,{j+i,i}});
            if(j-i>=0) v[j][i].pb({1,{j-i,i}});
       }
    priority_queue<edge , vector< edge >, greater< edge > > q;
    memset(D,-1,sizeof(D));
    q.push({0,{s,179}});
    while(!q.empty()){
        ll une, nmbr, power;
        une=q.top().cost;
        nmbr=q.top().num;
        power=q.top().pwr;
        q.pop();
        if(D[nmbr][power]!=-1) continue;
        D[nmbr][power]=une;
        for(edge no : v[nmbr][power]) if(D[no.num][no.pwr]==-1) q.push({une+no.cost,{no.num,no.pwr}});
    }
    cout<<D[e][179];
}

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