Submission #334944

#	Time	Username	Problem	Language	Result	Execution time	Memory
334944		Saynaa	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	1070 ms	9848 KiB

skyscraper

#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
const int MAXN = 3e5 + 2;
int n, m, b[MAXN], p[MAXN], dis[MAXN];
vector< int > adj[MAXN];

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> m;
	for(int i = 0; i < m; i ++){
		cin >> b[i] >> p[i];
		adj[b[i]].push_back(p[i]);
	}
	fill(dis, dis + n, INT_MAX/2);
	dis[b[0]] = 0;
	priority_queue< pair< int, int> > q;
	q.push({0, b[0]});
	while( q.size() ){
		int v = q.top().second;
		q.pop();
		for(int i = 0; i < adj[v].size(); i ++){
			int u = adj[v][i];
			int x = 1;
			for(int i = v + u; i < n; i += u){
				if( dis[i] <= dis[v] + x){
					x ++;
					continue;
				}
				dis[i] = dis[v] + x, q.push({-dis[i], i});
				x ++;	
			} 
			x = 1;
			for(int i = v - u; i >= 0; i -= u){
				if( dis[i] <= dis[v] + x){
					x ++;
					continue;
				}
				dis[i] = dis[v] + x, q.push({-dis[i], i});
				x ++;
			}

			
			
		}
	}
	
	cout << (dis[b[1]] != INT_MAX/2 ? dis[b[1]] : -1 ) << '\n';
	return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   for(int i = 0; i < adj[v].size(); i ++){
      |                  ~~^~~~~~~~~~~~~~~

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