Submission #1157160

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157160		agrim_09	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	57 / 100	246 ms	327680 KiB

skyscraper

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
template <class T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define endl '\n';
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define py cout << "YES" << endl;
#define pn cout << "NO" << endl;
#define pb push_back
#define int long long
typedef long double lld;
#define double lld
typedef long long ll;
typedef unsigned long long ull;
const ll inf = 1e18;
const ll mod = 1e9+7;
const int N = 2e5;
vector<int>primes = {2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97};

// Check for queue, priorioty_queue, stack, ordered_set solutions
// stack => LIFO (whatever goes in last comes out last)
// queue => FIFO (whatever goes in first comes out first)
// priority_queue => Dynamic queries of minimum/maximum
// ordered_set => set in vector form
//[order_of_key(k) gives number of elements less than k, while find_by_order(i) gives i^th element]

// To comment multiple lines : ctrl + /
// To find and replace : ctrl+H

void judge(){
    srand(time(NULL));
    #ifndef ONLINE_JUDGE
    freopen("1.txt","r",stdin);
    freopen("2.txt","w",stdout);
    freopen("Error.txt", "w", stderr);
    #define debug(x...) cerr << #x <<" = "; _print(x); cerr << endl;
    #else
    #define debug(x...)
    #endif
}

void usaco(string s) {
    freopen((s + ".in").c_str(),"r",stdin);
    freopen((s + ".out").c_str(),"w",stdout);
}
int n,m;
vector<vector<pair<int,int>>>adj;
vector<vector<int>>dist;
vector<int>b,p;

void input(){
    cin >> n >> m;
    adj.resize(n);
    dist.resize(n,vector<int>(n,inf));
    b.resize(m);
    p.resize(m);
    for(int i = 0;i<m;i++){
        cin >> b[i] >> p[i];
    }
}

void shortest_distance(int src, int trgt){
    vector<int>dist(n,inf);
    priority_queue<pair<int,int>>pq;
    pq.push({0,src});
    dist[src] = 0;
    while(!pq.empty()){
        auto x = pq.top(); pq.pop();
        int d = -1*x.first, node = x.second;
        if(dist[node]!=d){
            continue;
        }
        for(auto [child,wt] : adj[node]){
            if(dist[child]>dist[node]+wt){
                dist[child] = dist[node]+wt;
                pq.push({-1*dist[child],child});
            }
        }
    }
    if(dist[trgt]==inf){
        cout << -1;
    }
    else{
        cout << dist[trgt];
    }
}

signed main(){
    fastio; //judge(); 
    input();

    for(int i = 0;i<m;i++){
        for(int j = b[i]%p[i];j<n;j+=p[i]){
            if(j==b[i]){
                continue;
            }
            int k = abs(j-b[i])/p[i];
            dist[b[i]][j] = min(dist[b[i]][j],k);
        }
    }
    for(int i = 0;i<n;i++){
        for(int j = 0;j<n;j++){
            if(dist[i][j]!=inf){
                adj[i].pb({j,dist[i][j]});
            }
        }
    }
    shortest_distance(b[0],b[1]);
}

Compilation message (stderr)

skyscraper.cpp: In function 'void judge()':
skyscraper.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen("1.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
skyscraper.cpp:38:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     freopen("2.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:39:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     freopen("Error.txt", "w", stderr);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp: In function 'void usaco(std::string)':
skyscraper.cpp:47:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |     freopen((s + ".in").c_str(),"r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:48:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     freopen((s + ".out").c_str(),"w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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