Submission #977521

#	Time	Username	Problem	Language	Result	Execution time	Memory
977521		Amaarsaa	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	100 / 100	595 ms	7632 KiB

skyscraper

#include<bits/stdc++.h>

using namespace std;
using ll = long long ;
ll D[30005];
vector < ll > v[30005];
int main() {
//	freopen("moocast.in", "r", stdin);
//	freopen("moocast.out", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
	
	cin >> m >> n;
	
	priority_queue < pair < ll, ll >, vector < pair < ll, ll >> , greater < pair < ll, ll >> > pq;
	
	ll a[n + 2], b[n + 2];
	for (i = 0; i < n; i ++) {
		cin >> a[i] >> b[i];
		v[a[i]].push_back(b[i]);
	}
	for (i = 0; i <= m; i ++) D[i] = 1e18;
	D[a[0]] = 0;
	pq.push({0, a[0]});
	while(!pq.empty()) {
		x = pq.top().first;
		y = pq.top().second;
		pq.pop();
		if ( x != D[y]) continue;
		for ( ll X : v[y]) {
			s = y - X;
			dist = 1;
			while ( s >= 0) {
				
				if ( D[s] > D[y] + dist) {
					D[s] = D[y] + dist;
					pq.push({D[s], s});
				}
				dist ++;
				s -= X;
			}
			s = y + X;
			dist = 1;
			while ( s < m) {
				if ( D[s] > D[y] + dist) {
					D[s] = D[y] + dist;
					pq.push({D[s], s});
				}
				dist ++;
				s += X;
			}
		}
	}
	if ( D[a[1]] == 1e18) cout << -1 << endl;
	else cout << D[a[1]] << endl;
	
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:12:5: warning: unused variable 't' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |     ^
skyscraper.cpp:12:14: warning: unused variable 'ans' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |              ^~~
skyscraper.cpp:12:22: warning: unused variable 'sum' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |                      ^~~
skyscraper.cpp:12:38: warning: unused variable 'r' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |                                      ^
skyscraper.cpp:12:41: warning: unused variable 'p' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |                                         ^
skyscraper.cpp:12:47: warning: unused variable 'j' [-Wunused-variable]
   12 |  ll t, n, m, ans, s, sum,dist, x, y, r, p, i, j;
      |                                               ^

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