Submission #695220

#	Time	Username	Problem	Language	Result	Execution time	Memory
695220		Mizo_Compiler	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	0 / 100	4 ms	4956 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
#define MOEZ ios_base::sync_with_stdio(false);cin.tie(NULL),cout.tie(NULL);
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define F first
#define S second
#define pb push_back
#define all(v) v.begin() , v.end()
#define eb emplace_back
#define getunique(v) {sort(v.begin(), v.end()); v.erase(unique(v.begin(), v.end()), v.end());}
#define mem(d , x) memset(d , x , sizeof(d));
#define sz(x) (int)x.size()
const int N = 2e5+5;
//const ll M = 1e9+7;
//const ll inf = 1e18;
//const ld eps = 1e-6;
int n , id[N] , p[N] , m;
vector<pair<int , int>>adj[N];
int d[N];
int main(){
    MOEZ
    cin >> n >> m;
    for(int i = 0; i < n;i++){
        d[i] = 1e8;
    }
    for(int i = 0; i < m;i++){
        cin >> id[i];
        cin >> p[i];
        int cnt = 1;
        for(int j = id[i]+p[i]; j < n;j += p[i]){
            adj[id[i]].pb({j , cnt++});
        }
        cnt = 1;
        for(int j = id[i]-p[i]; j >= 0;j -= p[i]){
            adj[id[i]].pb({j , cnt++});
        }
    }
    priority_queue<pair<int , int> , vector<pair<int , int>> , greater<>>q;
    q.push({id[0] , 0});
    while(!q.empty()){
        int u = q.top().F , cost = q.top().S;
        q.pop();
        if(d[u] < cost)continue;
        if(u == id[1])break;
        for(auto x:adj[u]){
            int v = x.F , nc = cost+x.S;
            if(nc < d[v]){
                d[v] = nc;
                q.push({v , nc});
            }
        }
    }
    cout << (d[id[1]] == 1e8 ? -1 : d[id[1]]);
}

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