Submission #535829

#	Time	Username	Problem	Language	Result	Execution time	Memory
535829		PoPularPlusPlus	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	1091 ms	42524 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 998244353; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}

//freopen("problemname.in", "r", stdin);
//freopen("problemname.out", "w", stdout);

void solve(){
	int n , m1;
	cin >> n >> m1;
	vector<vector<int>> v(n);
	map<pair<int,int>,int> m;
	int dis[n];
	memset(dis,0,sizeof dis);
	int s , e;
	for(int i = 0; i < m1; i++){
		int b,p;
		cin >> b >> p;
		if(i == 0)s = b;
		v[b].pb(p);
		if(i == 1)e = b;
	}
	queue<array<int,3>> q;
	memset(dis,-1,sizeof dis);
	dis[s] = 0;
	for(int i : v[s]){
		if(m[{s,i}] == 0){
			array<int,3> lol = {s,i,0};
			q.push(lol);
		}
	}
	while(q.size()){
		array<int,3> p = q.front();
		q.pop();
		if(p[0] + p[1] < n && m[{p[0]+p[1] , p[1]}] == 0){
			m[{p[0]+p[1] , p[1]}] = 1;
			array<int,3> lol = {p[0]+p[1],p[1],p[2]+1};
			q.push(lol);
			if(dis[p[0]+p[1]] == -1){
				dis[p[0]+p[1]] = p[2]+1;
				for(int i : v[p[0]+p[1]]){
					if(m[{p[0]+p[1],i}]==0){
						array<int,3> again = {p[0]+p[1] , i , dis[p[0]+p[1]]};
						q.push(again);
					}
				}
			}
		}
		if(p[0] - p[1] >=0 && m[{p[0]-p[1] , p[1]}] == 0){
			m[{p[0]-p[1] , p[1]}] = 1;
			array<int,3> lol = {p[0]-p[1],p[1],p[2]+1};
			q.push(lol);
			if(dis[p[0]-p[1]] == -1){
				dis[p[0]-p[1]] = p[2]+1;
				for(int i : v[p[0]-p[1]]){
					if(m[{p[0]-p[1],i}] == 0){
						array<int,3> again = {p[0]-p[1] , i , dis[p[0]-p[1]]};
						q.push(again);
					}
				}
			}
		}
	}
	cout << dis[e] << '\n';
}

int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	//int t;cin >> t;while(t--)
	solve();
	return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:77:20: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
   77 |  cout << dis[e] << '\n';
      |                    ^~~~

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