Submission #1038277

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038277		idas	Last supper (IOI12_supper)	C++11	100 / 100	159 ms	11044 KiB

advisor

#include <bits/stdc++.h>
#include "advisor.h"

#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define s second
#define f first

using namespace std;
typedef pair<int, int> pii;

namespace advisor{
    const int MxN=2e5+10, INF=1e9;
    int n, k, c[MxN], nxt[MxN], cur[MxN];
    unsigned char bits[MxN];
}

using namespace advisor;

void ComputeAdvice(int *C, int N, int K, int M) {
    n=N; k=K; FOR(i, 0, n) c[i]=C[i], cur[i]=INF;
    for(int i=n-1; i>=0; i--){
        nxt[i+k]=cur[c[i]];
        cur[c[i]]=i;
    }
    FOR(i, 0, k) nxt[i]=cur[i];
    FOR(i, 0, n+k) bits[i]=0;

    set<pii> cols;
    set<pii, greater<pii>> st;
    FOR(i, 0, k) st.insert({nxt[i],i}), cols.insert({i,i});

    FOR(i, 0, n)
    {
        auto src=cols.lower_bound({c[i],0});
        if(src!=cols.end() && (*src).f==c[i]){
            auto it=src;
            int in=(*it).s;

            st.erase({nxt[in],in});
            cols.erase(it);

            cols.insert({c[i],i+k});
            st.insert({nxt[i+k],i+k});
        }
        else{
            auto it=st.begin();
            int in=(*it).s;
            bits[in]=1;

//            cout << "rem: " << in << endl;
            st.erase(it);

            int col;
            if(in<k) col=in;
            else col=c[in-k];
            cols.erase({col,in});

            cols.insert({c[i],i+k});
            st.insert({nxt[i+k],i+k});
        }
    }

    FOR(i, 0, n+k) WriteAdvice(bits[i]);

//    FOR(i, 0, n+k) cout << int(bits[i]);
//    cout << endl;
}

assistant

#include <bits/stdc++.h>
#include "assistant.h"

#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define pb push_back
#define s second
#define f first

using namespace std;
typedef vector<int> vi;

void Assist(unsigned char *bits, int n, int k, int r) {

    vi bad;
    set<int> cols;
    FOR(i, 0, k)
    {
        cols.insert(i);
        if(bits[i]==1) bad.pb(i);
    }

//    FOR(i, 0, n+k) cout << bits[i];
//    cout << endl;

//    cout << "bad: ";
//    for(auto it : bad) cout << it << " ";
//    cout << endl;

    FOR(i, k, n+k)
    {
        int next_col=GetRequest();
        if(!cols.count(next_col)){
            cols.erase(bad.back());
            PutBack(bad.back());
            bad.pop_back();
        }
        if(bits[i]==1) bad.pb(next_col);
        cols.insert(next_col);
    }
}

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 35 / 35
• Subtask 5: 39 / 39