Submission #450489

#	Time	Username	Problem	Language	Result	Execution time	Memory
450489		Blobo2_Blobo2	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	36 / 100	1091 ms	6340 KiB

skyscraper

/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
/*#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")*/
#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define endl "\n"
#define all(v)  v.begin(),v.end()
#define gen(arr,n,nxt)  generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);

const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}

signed main(){
    Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
    int n=nxt(),m=nxt();
    vector<pair<int,int> >v;
    for(int i=0;i<m;i++){
        int b=nxt(),p=nxt();
        v.push_back({b,p});
    }
    int from = v[0].first,to = v[1].first;
    sort(all(v));
    vector<pair<int,int> >adj[n+1];
    for(int i=0;i<v.size();i++){
        for(int j=i+1;j<v.size();j++){
            if(abs(v[i].first-v[j].first)%(v[i].second)==0){
                adj[v[i].first].push_back({v[j].first,abs(v[i].first-v[j].first)/(v[i].second)});
                if(v[i].second==v[j].second)
                    break;
            }
        }
    }
    for(int i=v.size()-1;i>=0;i--){
        for(int j=i-1;j>=0;j--){
            if(abs(v[i].first-v[j].first)%(v[i].second)==0){
                adj[v[i].first].push_back({v[j].first,abs(v[i].first-v[j].first)/(v[i].second)});
                if(v[i].second==v[j].second)
                    break;
            }
        }
    }
    int dis[n],vis[n];
    for(int i=0;i<n;i++)
        dis[i]=INF,vis[i]=0;
    dis[from]=0;
    priority_queue<pair<int,int> >q;
    q.push({0,from});
    while(!q.empty()) {
        int a=q.top().second;q.pop();
        if(vis[a])continue;
        vis[a]=1;
        for(auto u:adj[a]){
            int b=u.first,w=u.second;
            if(dis[a]+w<dis[b]){
                dis[b]=dis[a]+w;
                q.push({-dis[b],b});
            }
        }
    }
    if(dis[to]==INF)cout<<-1<<endl;
    else cout<<dis[to]<<endl;
    return 0;
}

Compilation message (stderr)

skyscraper.cpp:19:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   19 | const int mo=1e9+7,INF=1e18;
      |                        ^~~~
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~
skyscraper.cpp:34:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |         for(int j=i+1;j<v.size();j++){
      |                       ~^~~~~~~~~

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