Submission #60523

#	Time	Username	Problem	Language	Result	Execution time	Memory
60523		istlemin	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	1025 ms	23328 KiB

skyscraper

#include<bits/stdc++.h>

using namespace std;

#define rep(i,a,b) for(int i = a; i<int(b);++i)
#define all(v) v.begin(),v.end()
#define sz(v) v.size()
#define trav(a,c) for(auto a: c)

typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pii;

int main(){
	cin.sync_with_stdio(false);
    ll n,m;
    cin>>n>>m;

    vi b(m);
    vi p(m);


    vector<vi > doges(n);
    vector<vi> e;

    rep(i,0,m) {
		cin>>b[i]>>p[i];
        doges[b[i]].push_back(i);
	}

    priority_queue<pair<ll,ll>,vector<pii>,greater<pii> > q; //(jumps,doge);
    q.emplace(0,b[0]);

    vector<bool> seen(n);

    while(q.size()){
        ll pos,jumps;
        tie(jumps,pos) = q.top();
        q.pop();
        //cout<<pos<<" "<<jumps<<": "<<endl;

		if(seen[pos]) continue;
		seen[pos] = true;

		rep(j,0,doges[pos].size())
			if(doges[pos][j]==1){
				cout<<jumps<<endl;
				_Exit(0);
			}

		rep(i,0,n){
			if(seen[i]) continue;
			ll mn = 1e18;
			rep(j,0,doges[pos].size()){
				if((i-pos)%p[doges[pos][j]]==0) mn = min(mn,abs(i-pos)/p[doges[pos][j]]);
			}
			if(mn<1e18)
				q.emplace(mn+jumps,i);
		}

		/*
        vector<bool> seenHere(n);

		trav(doge,doges[pos]){
			if(doge==1){
				cout<<jumps<<endl;
				return 0;
			}
			//rep(i,0,n)
			//	if((i-pos)%p[doge]==0&&!seen[i])
			//		q.emplace(jumps+abs(i-pos)/p[doge],i);
			ll pi = p[doge];

            rep(i,1,n/pi+1){
				//cout<<pos+pi*i<<endl;
				if(pos+pi*i<n) {
					//if(seenHere[pos+pi*i]) break;
					//seenHere[pos+pi*i] = true;
					q.emplace(jumps+i,pos+pi*i);
				}
				if(pos-pi*i>=0) {
					//if(seenHere[pos-pi*i]) break;
					//seenHere[pos-pi*i] = true;
					q.emplace(jumps+i,pos-pi*i);
				}
            }
		}
        /*rep(i,0,n){
            if((b[i]-b[doge])%p[doge]==0&&!seen[i])
				q.emplace(jumps+abs(b[i]-b[doge])/p[doge],i);
        }*/
    }

    cout<<-1<<endl;
}

Compilation message (stderr)

skyscraper.cpp:88:9: warning: "/*" within comment [-Wcomment]
         /*rep(i,0,n){

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