Submission #1278544

#	Time	Username	Problem	Language	Result	Execution time	Memory
1278544		sasde	Passport (JOI23_passport)	C++20	16 / 100	2039 ms	33140 KiB

passport

#include<bits/stdc++.h>
using namespace std;
#define PI 3.14159265358979323846
#define sz(a) (int)a.size()
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
const int N=1e6+5,lg=30,mod=1e9+7,inf=1e9;
int node,l[N],r[N],query,dp[2505][2505];
main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    cin >> node;
    for(int i=1;i<=node;++i)cin >> l[i] >> r[i];
    cin >> query;
    while(query--){
        int i;
        cin >> i;
        for(int j=1;j<=node;++j)
            for(int k=1;k<=node;++k)dp[j][k]=inf;
        dp[l[i]][r[i]]=1;
        queue<ii>p;
        p.push({l[i],r[i]});
        while(!p.empty()){
            ii x=p.front();
            p.pop();
            for(int i=x.fi;i<=x.se;++i){
                ii y={min(x.fi,l[i]),max(x.se,r[i])};
                if(dp[y.fi][y.se]>dp[x.fi][x.se]+1){
                    dp[y.fi][y.se]=dp[x.fi][x.se]+1;
                    p.push(y);
                }
            }
        }
        int ans=dp[1][node];
        if(ans==inf)ans=-1;
        cout<<ans<<'\n';
    }
}

Compilation message (stderr)

passport.cpp:23:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main()
      | ^~~~

• Subtask 1: 0 / 6
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46