Submission #695065

#	Time	Username	Problem	Language	Result	Execution time	Memory
695065		edogawa_something	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	13 ms	17912 KiB

skyscraper

#include<bits/stdc++.h>
#include<chrono>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef string st;
typedef bool bl;
typedef vector<ll> vii;
typedef pair<ll,ll> pii;
typedef vector<pii> vpi;
#define pu push
#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
#define fast ios_base::sync_with_stdio(0);cin.tie();
#define test ll qqqqq;cin>>qqqqq;while(qqqqq--)
#define F first
#define S second
#define forn(i,n) for(ll i=0;i<n;i++)
#define forx(i,j,n) for(ll i=j;i<n;i++)
#define pb push_back
#define pob pop_back
#define all(v) v.begin(),v.end()
#define lb lower_bound
#define ub upper_bound
#define pof pop_front
#define pow powww
#define prtll(x) printf("%lld",x)
#define prtld(x) printf("%Lf",x)
#define prtst(x) printf("%s",x)
#define prtch(x) printf("%c",x)
#define measure chrono::high_resolution_clock::now()
const ll dx[]{1,0,-1,0};
const ll dy[]{0,-1,0,1};
const ll inf=2e18;
const ll mod=1e9+7;
const ll LM=2e7+1;
const ll M=2e6+1;
const ll MM=1002;
const ll MMM=501;
const ld pi=acos(-1);
//const ll mod=998244353;
ll pow(ll r,ll to,ll m=mod){
  ll res=1;
  r%=mod;
  while(to){
    if((to&1)){
      res*=r,res%=mod;
    }
    r*=r,r%=mod;
    to=(to>>1);
  }
  return res;
}
ll n,m,a[M],p[M],dis[M];
void bfs(){
  queue<ll>q;
  bl vis[M];
  q.push(0);
  dis[0]=0;
  vis[0]=1;
  while(!q.empty()){
    ll x=q.front();
    q.pop();
    forn(i,m){
      if(a[i]%p[x]==a[x]%p[x]){
      dis[i]=min(dis[i],abs(a[x]-a[i])/p[x]+dis[x]);
      if(!vis[i])
      q.push(i),vis[i]=1;
      }
    }
  }
}
int main(){
  fast
  memset(dis,mod,sizeof dis);
  cin>>n>>m;
  forn(i,m){
    cin>>a[i]>>p[i];
  }
  bfs();
  if(dis[1]==mod)
  dis[1]=-1;
  cout<<dis[1]<<'\n';
  return 0;
}
/*

*/

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