제출 #735361

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
735361		ReLice	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	36 / 100	291 ms	262144 KiB

skyscraper

#include <bits/stdc++.h>
#define ll int
#define ld long double
#define pb push_back
#define endl "\n"
#define fr first
#define sc second
#define sz size()
#define bc back()
using namespace std;
const ll N=2e3+7;
ll n,d[N];
vector <vector <pair<ll,ll>> > g(N);
void dijkstra(ll val){
    set <pair<ll,ll>> q;
    q.insert({0,val});
    d[val]=0;
    while(!q.empty()){
        ll x=q.begin()->sc;
        q.erase(q.begin());
        for(auto i : g[x]){
            ll len=i.sc,to=i.fr;
            if(d[to]>d[x]+len){
                q.erase({d[to], to});
                d[to]=d[x]+len;
                q.insert({d[to],to});
            }
        }
    }
}
void solve(){
    ll i,j,q,b,c,m,t;
    ll k;
    cin>>n>>m;
    for(i=0;i<m;i++){
        cin>>b>>t;
        if(i==0) k=b;
        if(i==1) q=b;
        c=0;
        for(j=b+t;j<n;j+=t){
            c++;
            g[b].pb({j,c});
        }
        c=0;
        for(j=b-t;j>=0;j-=t){
            c++;
            g[b].pb({j,c});
        }
    }
    for(i=0;i<n;i++) d[i]=INT_MAX;
    dijkstra(k);
    if(d[q]==INT_MAX) cout<<-1<<endl;
    else cout<<d[q]<<endl;
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll t=1;
    while(t--) solve();
}
/*
5 3
0 2
1 1
4 1
*/

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:51:13: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
   51 |     dijkstra(k);
      |     ~~~~~~~~^~~
skyscraper.cpp:52:11: warning: 'q' may be used uninitialized in this function [-Wmaybe-uninitialized]
   52 |     if(d[q]==INT_MAX) cout<<-1<<endl;
      |        ~~~^

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