Submission #523204

#	Time	Username	Problem	Language	Result	Execution time	Memory
523204		mansur	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	22 / 100	30 ms	604 KiB

skyscraper

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e15, N = 5e3 + 1, mod = 998244353;                    

double eps = 1e-6;

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

main() {                                                         
	//freopen("F.in", "r", stdin);                                                                                     
	//freopen("F.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                       
	cin.tie(NULL);
	int n, m;
	cin >> n >> m;
	int b[m + 1], p[m + 1];
	vector<int> h[n + 1];
	for (int i = 1; i <= m; i++) {
		cin >> b[i] >> p[i];
		h[b[i]].pb(p[i]);
	}    	
	set<pii> s;
	vector<int> d(n + 1, inf);
	s.insert({0, b[1]});
	d[b[1]] = 0;
	while (!s.empty()) {
		int u = (*s.begin()).ss;
		s.erase(s.begin());
		for (auto e: h[u]) {
			for (int j = u; j <= n; j += e) {
				if (d[j] > d[u] + (j - u) / e) {
					s.erase({d[j], j});
					d[j] = d[u] + (j - u) / e;
					s.insert({d[j], j});
				}
			}
			for (int j = u - e; j >= 1; j -= e) {
				if (d[j] > d[u] + (u - j) / e) {
					s.erase({d[j], j});
					d[j] = d[u] + (u - j) / e;
					s.insert({d[j], j});
				}
			}
		} 		
	}
	if (d[b[2]] == inf) d[b[2]] = -1;
	cout << d[b[2]];
}
                                                                           

Compilation message (stderr)

skyscraper.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
skyscraper.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main() {
      | ^~~~

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