Submission #935365

#	Time	Username	Problem	Language	Result	Execution time	Memory
935365		tamir1	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	22 / 100	459 ms	262144 KiB

skyscraper

#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
using namespace std;
ll n,m,i,j,dist[30005],b[30005],p[30005],x,y;
map<ll,ll> mp[30005];
map<ll,ll> ::iterator it;
bitset<30005> vis;
priority_queue<pair<ll,ll>> q;
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> n >> m;
	for(i=0;i<m;i++){
		cin >> b[i] >> p[i];
		if(i==1) continue;
		x=b[i]+p[i];
		y=0;
		while(x<n){
			y++;
			it=mp[b[i]].find(x);
			if(it==mp[b[i]].end()) mp[b[i]][x]=y;
			else mp[b[i]][x]=min(mp[b[i]][x],y);
			x+=p[i];
		}
		x=b[i]-p[i];
		y=0;
		while(x>=0){
			y++;
			it=mp[b[i]].find(x);
			if(it==mp[b[i]].end()) mp[b[i]][x]=y;
			else mp[b[i]][x]=min(mp[b[i]][x],y);
			x-=p[i];
		}
	}
	q.push({0,b[0]});
	while(!q.empty()){
		x=q.top().ss;
		y=q.top().ff;
		q.pop();
		if(vis[x]) continue;
		dist[x]=-y;
		vis[x]=1;
		for(auto [p,r]:mp[x]){
			if(!vis[p]){
				q.push({y-r,p});
			}
		}
	}
	if(vis[b[1]]) cout << dist[b[1]];
	else cout << -1;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:46:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   46 |   for(auto [p,r]:mp[x]){
      |            ^

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