Submission #1037625

#	Time	Username	Problem	Language	Result	Execution time	Memory
1037625		Muhammet	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	1 ms	604 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;

#define ll long long int
#define sz(x) (int)x.size()
#define ff first
#define ss second

const ll N = 30002;

ll T, n, m, dis[N];

vector <int> v1;

pair<int,int> a[N];

set <int> v;

int main(){
    // ios::sync_with_stdio(false); cin.tie(0);

    cin >> n >> m;


    for(int i = 0; i < m; i++){
        cin >> a[i].ff >> a[i].ss;
        if(a[i].ff != a[0].ff){
            v.insert(a[i].ff);
        }
    }

    int ind = a[0].ff, p = a[1].ff;

    sort (a,a+m);

    for(int i = 0; i <= n; i++) dis[i] = 1e9;
    dis[ind] = 0;

    for(int i = 0; i < m; i++){
        if(a[i].ff == ind){
            if(sz(v1) > 0 and a[i].ss == v1.back()) continue;
            v1.push_back(a[i].ss);
        }
    }

    while(sz(v) > 0){
        int mn = 1e9, k = -1, cnt = 0, b = 0;
        for(auto i : v1){
            for(auto j : v){
                if(dis[j] < mn){
                    mn = dis[j];
                    k = j;
                }
                if(abs(j-ind) % i != 0) continue;
                dis[j] = min(dis[j],dis[ind]+abs(j-ind)/i);
                if(dis[j] < mn){
                    mn = dis[j];
                    k = j;
                }
            }
        }
        v1.clear();
        int l = 0, r = m-1, x;
        while(l <= r){
            int md = (l + r) / 2;
            if(a[md].ff >= k){
                x = md;
                r = md-1;
            }
            else {
                l = md+1;
            }
        }
        ind = k;
        for(int i = x; i < m; i++){
            if(a[i].ff == ind){
                if(sz(v1) > 0 and a[i].ss == v1.back()) continue;
                v1.push_back(a[i].ss);
            }
            else break;
        }
        v.erase(v.find(ind));
        if(ind == p) break;
    }

    cout << dis[p];

    return 0;
}   

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:47:31: warning: unused variable 'cnt' [-Wunused-variable]
   47 |         int mn = 1e9, k = -1, cnt = 0, b = 0;
      |                               ^~~
skyscraper.cpp:47:40: warning: unused variable 'b' [-Wunused-variable]
   47 |         int mn = 1e9, k = -1, cnt = 0, b = 0;
      |                                        ^
skyscraper.cpp:75:24: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   75 |         for(int i = x; i < m; i++){
      |                        ^

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