Submission #1274209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274209		quanduongxuan12	Cave (IOI13_cave)	C++20	100 / 100	214 ms	544 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
#define name "cave"
#define MAXN 100005
#define pb push_back
#define pf push_front
#define ll long long
#define ii pair<int, int>
#define fs first
#define sc second
#define ill pair<int, ll>
#define lli pair<ll, int>
#define llll pair<ll, ll>
#define all(v) v.begin(),v.end()
#define uni(v) v.erase(unique(all(v)),v.end())
#define bit(n,i) (((n)>>(i))&1)
#define FOR(i,a,b) for (int i=(a),_b=(b); i<=_b; i++)
#define FORD(i,a,b) for (int i=(a),_b=(b); i>=_b; i--)
#define MASK(i) (1LL<<(i))
const int INF=1e9;
const int MOD=1e9+7;
void add(int &u, int v){
    u+=v;
    if (u>=MOD) u-=MOD;
}
void sub(int &u, int v){
    u-=v;
    if (u<0) u+=MOD;
}
void minimize(int &u, int v){
    u=min(u,v);
}
void maximize(int &u, int v){
    u=max(u,v);
}
long long Rand(long long l, long long r){
    ll tmp=0;
    FOR(i,1,4) tmp=((tmp<<15)^(((1<<15)-1)&rand()));
    return l+tmp%(r-l+1);
}
int S[MAXN],D[MAXN];
bool mark[MAXN];
int dnc(int l, int r, int id, int color){
    if (l==r) return l;
    int mid=(l+r)/2;
    FOR(i,l,mid){
        if (!mark[i]){
            S[i]=color;
        }
    }
    int x=tryCombination(S);
    FOR(i,l,mid) if (!mark[i]) S[i]^=1;
    if (x!=id) return dnc(l,mid,id,color);
    return dnc(mid+1,r,id,color);
}
void exploreCave(int N){
    FOR(i,0,N-1) S[i]=0;
    FOR(i,0,N-1){
        int x=tryCombination(S);
        int u=-1;
        if (x!=i){
            FOR(j,0,N-1) if (!mark[j]){
                u=S[j];
                S[j]^=1;
            }
        }
        else{
            FOR(j,0,N-1){
                if (!mark[j]) u=S[j]^1;
            }
        }
        int y=dnc(0,N-1,i,u);
        mark[y]=1;
        S[y]^=1;
        D[y]=i;
    }
    answer(S,D);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24