Submission #928114

#	Time	Username	Problem	Language	Result	Execution time	Memory
928114		OAleksa	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	10 / 100	2 ms	2164 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define int long long
const int N = 30069;
const int inf = 1e18;
int n, m, a[N], b[N], dis[N];;
vector<int> c[N];
vector<pair<int, int>> g[N];
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
  	cin >> n >> m;
  	for (int i = 1;i <= m;i++) {
  		cin >> a[i] >> b[i], ++a[i];
  		c[a[i]].push_back(i);
  	}
  	for (int i = 1;i <= n;i++)
  		dis[i] = inf;
		priority_queue<pair<int, int>> q;
		q.push({0, 1});
		dis[a[1]] = 0;
		while (!q.empty()) {
			auto i = q.top().s;
			auto w = abs(q.top().f);
			q.pop();
			if (i == 2)
				break;
			for (int j = a[i], d = 0;j <= n;j += b[i],d++) {
				if (dis[j] > w + d && !c[j].empty()) {
					dis[j] = w + d;
					for (auto u : c[j])
						q.push({-dis[j], u});
				}
			}
			for (int j = a[i], d = 0;j >= 1;j -= b[i],d++) {
				if (dis[j] > w + d && !c[j].empty()) {
					dis[j] = w + d;
					for (auto u : c[j])
						q.push({-dis[j], u});
				}
			}
		}
  	if (dis[a[2]] == inf)
  		cout << -1 << '\n';
  	else
  		cout << dis[a[2]] << '\n';
  }
  return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:23:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   23 |    for (int i = 1;i <= n;i++)
      |    ^~~
skyscraper.cpp:25:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   25 |   priority_queue<pair<int, int>> q;
      |   ^~~~~~~~~~~~~~

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