Submission #236048

#	Time	Username	Problem	Language	Result	Execution time	Memory
236048		thtsshz_bgwrswh	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	0 / 100	5 ms	1024 KiB

skyscraper

#pragma GCC optimize("Ofast")
#include<stdio.h>
#include<vector>
#include<queue>
#include<set>
#include<utility>
#include<algorithm>
using namespace std;
int pos[30005],power[30005],dis[30005];
vector<pair<int,int>> g[30005];
priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
int main(){
	int i,j,n,m;
	scanf("%d%d",&n,&m);
	for(i=0;i<m;i++)
		scanf("%d%d",&pos[i],&power[i]);
	for(i=0;i<m;i++)
		for(j=0;j<m;j++){
			if(j==i||pos[j]==pos[i]||abs(pos[j]-pos[i])%power[i])
				continue;
			g[i].emplace_back(j,abs(pos[j]-pos[i])/power[i]);
		}
	for(i=0;i<m;i++)
		dis[i]=1000000000;
	dis[0]=0;
	pq.push({0,0});
	while(pq.size()){
		auto v=pq.top().second;
		pq.pop();
		for(auto x:g[v]){
			if(dis[v]+x.second<dis[x.first]){
				dis[x.first]=dis[v]+x.second;
				pq.push({dis[x.first],x.first});
			}
		}
	}
	if(dis[1]==1000000000)
		puts("-1");
	else
		printf("%d\n",dis[1]);
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:16:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&pos[i],&power[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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