Submission #1133050

#	Time	Username	Problem	Language	Result	Execution time	Memory
1133050		t9unkubj	Jakarta Skyscrapers (APIO15_skyscraper)	C++20	100 / 100	966 ms	4028 KiB

skyscraper

#ifdef t9unkubj

#define _GLIBCXX_DEBUG
#include"debug.cpp"
//#include"template_no_debug.h"
#else 
#define dbg(...) 199958
#endif

#pragma GCC optimize("O3")
using namespace std;
#include<bits/stdc++.h>
using ll=long long;
using ull=unsigned long long;
template<class T>using vc=vector<T>;
template<class T>using vvc=vc<vc<T>>;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,j,n) for(ll i=(j);i<(ll)(n);i++)
#define DREP(i,n,m) for(ll i=(n);i>=(m);i--)
#define drep(i,n) for(ll i=((n)-1);i>=0;i--)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
template<class T,class F>
bool chmin(T &x, F y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template<class T, class F>
bool chmax(T &x, F y){
    if(x<y){
        x=y;
        return true;
    }
    return false;
}
double pass_time=0;
ll brute(int n,int m,vc<int>b,vc<int>p){
    vvc<int>is(n);
    rep(i,m){
        is[b[i]].push_back(i);
    }
    vc<int>dp(n,1e9);
    using T=pair<int,int>;
    priority_queue<T,vc<T>,greater<>>que;
    auto update=[&](int a,int b){
        if(chmin(dp[a],b))que.push({b,a});
    };
    update(b[0],0);
    while(que.size()){
        auto [d,a]=que.top();que.pop();
        if(dp[a]!=d)continue;
        for(auto&i:is[a]){
            for(int t=0;;t++){
                if(a+p[i]*t<n)update(a+p[i]*t,t+dp[a]);
                else break;
            }
            for(int t=0;;t++){
                if(a-p[i]*t>=0)update(a-p[i]*t,t+dp[a]);
                else break;
            }
        }
    }
    int ans=dp[b[1]];
    if(ans>1e8)return -1;
    return ans;
}
void run(){
    int n,m;
    cin>>n>>m;
    vc<int>b(m),p(m);
    rep(i,m)cin>>b[i]>>p[i];
    cout<<brute(n,m,b,p)<<"\n";
}
signed main(){
#ifdef t9unkubj
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
    cin.tie(0)->sync_with_stdio(0);
    pass_time=clock();
    int t=1;
    //cin>>t;
    while(t--){
        run();
    }
    pass_time=clock()-pass_time;
    dbg(pass_time/CLOCKS_PER_SEC);
}
/*
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: 43 / 43