Submission #745081

#	Time	Username	Problem	Language	Result	Execution time	Memory
745081		onebit1024	Two Currencies (JOI23_currencies)	C++17	0 / 100	1 ms	468 KiB

currencies

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pb push_back
#define all(c) c.begin(), c.end()
#define endl "\n"

const double PI=3.141592653589;


void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define dbg(x...) cerr << "LINE(" << __LINE__ << ") -> " <<"[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif



void solve()
{
    int n;
    cin >> n;
    vector<vector<int>>adj(n+1);
    vector<int>deg(n+1);
    for(int i = 1;i<=n;++i){
        int l,r;
        cin >> l >> r;
        for(int j = l;j<=r;++j){
            if(i==j)continue;
            adj[i].pb(j);
            deg[i]++;
        }
    }
    int c = 0;
    for(int j = 1;j<=n;++j){
        if(deg[j]==0)c++;
    }
    int Q;
    cin >> Q;
    while(Q--){
        vector<int>dist(n+1,1e18);
        vector<int>visited(n+1),par(n+1);
        queue<int>q;
        int x;
        cin >> x;
        dist[x] = 0;
        q.push(x);
        while(!q.empty()){
            int u = q.front();
            q.pop();
            if(visited[u])continue;
            visited[u] = 1;
            for(int v : adj[u]){
                par[v] = u;
                dist[v] = min(dist[v],dist[u]+1);
                q.push(v);
            }
        }
        
        int res = *max_element(dist.begin()+1, dist.end());
        set<int>w;
        for(int i = 1;i<=n;++i){
            if(deg[i]==0)w.insert(par[i]);
        }
        if(res==1e18 || w.size()>1)res=-1;
        cout << res << endl;
    }
}   

int32_t main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);


    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    

    int T=1;
    for(int i = 1;i<=T;++i)
    {
        // cout << "Case #" << i << ": ";
        solve();
    }
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 28
• Subtask 3: 0 / 30
• Subtask 4: 0 / 32