Submission #879956

#	Time	Username	Problem	Language	Result	Execution time	Memory
879956		JakobZorz	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	1052 ms	2784 KiB

skyscraper

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
#include<limits.h>
#include<math.h>
#include<map>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<iomanip>
#include<cstring>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
using namespace std;
//const int MOD=1e9+7;
//typedef pair<ll,ll>Point;
//typedef pair<ll,ll>Line;
//#define x first
//#define y second

int n,m;
int pos[30000];
int gap[30000];
vector<int>gaps[30000];
int dist[30000];

void solve(){
    for(int i=0;i<30000;i++)
        dist[i]=1000000;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        cin>>pos[i]>>gap[i];
        gaps[pos[i]].push_back(gap[i]);
    }
    dist[pos[0]]=0;
    
    
    queue<int>q;
    q.push(pos[0]);
    
    while(!q.empty()){
        int pos=q.front();
        q.pop();
        
        for(int g:gaps[pos]){
            for(int i=1;pos+g*i<n;i++){
                if(dist[pos+g*i]>dist[pos]+i){
                    dist[pos+g*i]=dist[pos]+i;
                    q.push(pos+g*i);
                }
            }
            
            for(int i=1;pos-g*i>=0;i++){
                if(dist[pos-g*i]>dist[pos]+i){
                    dist[pos-g*i]=dist[pos]+i;
                    q.push(pos-g*i);
                }
            }
        }
    }
    
    
    int res=dist[pos[1]];
    if(res==1000000)
        res=-1;
    cout<<res<<"\n";
}

int main(){
    ios::sync_with_stdio(false);cout.tie(NULL);cin.tie(NULL);
    //freopen("bank.in","r",stdin);freopen("bank.out","w",stdout);
    int t=1;//cin>>t;
    while(t--)solve();
    return 0;
}

/*
 
5 3
0 2
1 1
4 1
 
 */

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