Submission #1250520

#	Time	Username	Problem	Language	Result	Execution time	Memory
1250520		SoMotThanhXuan	Easter Eggs (info1cup17_eastereggs)	C++20	87 / 100	8 ms	508 KiB

eastereggs

#include "grader.h"
#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define FOR(i, a, b) for(int i = (a), _b = (b); i <= _b; ++i)
#define REP(i, a, b) for(int i = (a), _b = (b); i >= _b; --i)
#define mp make_pair
#define all(v) v.begin(), v.end()
#define uni(v) v.erase(unique(all(v)), v.end())
#define Bit(x, i) ((x >> (i)) & 1)
#define Mask(i) (1 << (i))
#define Cnt(x) __builtin_popcount(x)
#define Cntll(x) __builtin_popcountll(x)
#define Ctz(x) __builtin_ctz(x) // so luong so 0 tinh tu ben phai
#define Ctzll(x) __builtin_ctzll(x)
#define Clz(x) __builtin_clz(x) // so luong so 0 tinh tu ben trai
#define Clzll(x) __builtin_clzll(x)
inline bool maximize(int &u, int v){
    return v > u ? u = v, true : false;
}
inline bool minimize(int &u, int v){
    return v < u ? u = v, true : false;
}
inline bool maximizell(long long &u, long long v){
    return v > u ? u = v, true : false;
}
inline bool minimizell(long long &u, long long v){
    return v < u ? u = v, true : false;
}
const int mod = 1e9 + 7;
inline int fastPow(int a, int n){
    if(n == 0) return 1;
    int t = fastPow(a, n >> 1);
    t = 1ll * t * t % mod;
    if(n & 1) t = 1ll * t * a % mod;
    return t;
}
inline void add(int &u, int v){
    u += v;
    if(u >= mod) u -= mod;
}
inline void sub(int &u, int v){
    u -= v;
    if(u < 0) u += mod;
}
const int maxN = 2e5 + 5;
const int inf = 1e9;
const long long infll = 1e18;
vector<int> adj[513];
vector<int> order;
void dfs(int u = 1, int p = 0){
    order.emplace_back(u);
    for(int v : adj[u]){
        if(v != p) dfs(v, u);
    }
}
int findEgg(int n, vector<pair<int, int>> bridges){
    FOR(i, 1, n)adj[i].clear();
    order.clear();
    for(auto[u, v] : bridges){
        adj[u].emplace_back(v);
        adj[v].emplace_back(u);
    }
    dfs();
    int l = 1, r = n;
    int res = 0;
    while(l <= r){
        int mid = l + r >> 1;
        if(query(vector<int> (order.begin(), order.begin() + mid))){
            res = mid - 1;
            r = mid - 1;
        }else l = mid + 1;
    }
    return order[res];
}
//void process(){
//
//}
//#define LOVE ""
//int main(){
//    if(fopen(LOVE".inp", "r")){
//        freopen(LOVE".inp", "r", stdin);
//        freopen(LOVE".out", "w", stdout);
//    }
//    ios_base::sync_with_stdio(false);
//    cin.tie(0);
//    cout.tie(0);
//
//    int t = 1;
////    cin >> t;
//    while(t--)
//        process();
////    cerr << '\n' << "Time elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s\n" ;
//    return 0;
//}

• Subtask 1: 32 / 40
• Subtask 2: 40 / 40
• Subtask 3: 15 / 20