oj.uz

Submission #533168

# Submission time Handle Problem Language Result Execution time Memory
533168 2022-03-05T04:06:55 Z balbit Chameleon's Love (JOI20_chameleon) C++14
100 / 100
 47 ms 520 KB 
#include "chameleon.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<ll, ll>
#define f first
#define s second

#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)

#define pb push_back
#define SZ(x) (int)((x).size())
#define ALL(x) (x).begin(), (x).end()

#define MX(a,b) a = max(a,b)
#define MN(a,b) a = min(a,b)

#ifdef BALBIT
template<typename T> void _do(T && x){cerr<<x<<endl;}
template<typename T, typename ...S> void _do(T && x, S && ...y){cerr<<x<<", "; _do(y...);}
#define bug(...) cerr<<"#"<<__LINE__<<"- "<<#__VA_ARGS__<<": ", _do(__VA_ARGS__)
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT


namespace {
const int maxn = 1000+3;
//int variable_example = 1;

vector<int> g[maxn]; // currently known graph
vector<int> p0, p1; // parts of bipartite graph

int col[maxn];

void bpdfs(int v, int c) {
    col[v] = c;
    for (int u : g[v]) {
        if (col[u] == -1) {
            bpdfs(u, c^1);
        }
    }
}

int QQ(vector<int> x) {
    for (int &y : x) ++y;
    return Query(x);
}

bool add(vector<int> &p, int v, int l, int r, bool def) {
    if (l > r) return 0;
    if (def == 0) {
        vector<int> aa;
        for (int i = l; i<=r; ++i) aa.pb(p[i]);
        aa.pb(v);
        int gt = QQ(aa);
        if (gt < SZ(aa) ) {
            // there is a love pair or an orig color pair
            def = 1;
        }
    }

    if (!def) return 0;
    if (l == r) {
        //here!
        int u = p[l];
        g[u].pb(v); g[v].pb(u);
        return 1;
    }
    int mid = (l+r)/2;
    bool getleft = add(p, v, l, mid, 0);
    add(p, v, mid+1, r, !getleft); // if getleft found nothing, there has to be smth in the right
    return 1;
}

set<pii> ban;

void bye(int a, int b) {
    if (a > b) swap(a,b);
    ban.insert({a,b});
}
}  // namespace



void Solve(int n) {
    REP(i, 2*n) {
        memset(col, -1, sizeof col);
        p0.clear(); p1.clear();
        REP(j, i) {
            if (col[j] == -1) {
                bpdfs(j, 0);
            }
        }
        REP(j,i) {
            if (SZ(g[j]) == 3) continue;
            (col[j]?p1:p0).pb(j);
        }
        add(p0, i, 0, SZ(p0)-1, 0);
        add(p1, i, 0, SZ(p1)-1, 0);
    }

//    REP(i,n*2) {
//        for (int v : g[i]) {
//            bug(i+1, v+1);
//        }
//    }

    REP(i,n*2) {
        if (SZ(g[i]) == 1) continue;
        assert(SZ(g[i]) <= 3);
//        random_shuffle(ALL(g[i]));
        int no2 = QQ({i, g[i][0], g[i][1]});
        if (no2 == 1) {
            bye(i, g[i][2]); continue;
        }
        int no1 = QQ({i, g[i][0], g[i][2]});
        if (no1 == 1) {
            bye(i, g[i][1]); continue;
        }
        bye(i, g[i][0]);
    }
    vector<pii> re;
    REP(i,n*2) {
        for (int u : g[i]) {
            if (u < i && !ban.count({u,i})) {
                re.pb({u,i});
                bug(u+1, i+1);
            }
        }
    }
    for (pii p : re) {
        Answer(p.f+1, p.s+1);
    }
}





/*
4
1 0 1 0 0 1 1 0
4 4 1 2 1 2 3 3
4 3 8 7 6 5 2 1
*/

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 22 ms 328 KB Output is correct
4 Correct 22 ms 388 KB Output is correct
5 Correct 22 ms 400 KB Output is correct
6 Correct 23 ms 400 KB Output is correct
7 Correct 22 ms 328 KB Output is correct
8 Correct 22 ms 328 KB Output is correct
9 Correct 24 ms 456 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 0 ms 328 KB Output is correct
7 Correct 0 ms 328 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 328 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 1 ms 328 KB Output is correct
5 Correct 1 ms 328 KB Output is correct
6 Correct 0 ms 328 KB Output is correct
7 Correct 0 ms 328 KB Output is correct
8 Correct 0 ms 328 KB Output is correct
9 Correct 0 ms 328 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 328 KB Output is correct
18 Correct 1 ms 328 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 35 ms 384 KB Output is correct
4 Correct 47 ms 376 KB Output is correct
5 Correct 35 ms 456 KB Output is correct
6 Correct 36 ms 392 KB Output is correct
7 Correct 36 ms 388 KB Output is correct
8 Correct 35 ms 448 KB Output is correct
9 Correct 39 ms 380 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 22 ms 328 KB Output is correct
4 Correct 22 ms 388 KB Output is correct
5 Correct 22 ms 400 KB Output is correct
6 Correct 23 ms 400 KB Output is correct
7 Correct 22 ms 328 KB Output is correct
8 Correct 22 ms 328 KB Output is correct
9 Correct 24 ms 456 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 0 ms 328 KB Output is correct
12 Correct 0 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 328 KB Output is correct
15 Correct 0 ms 328 KB Output is correct
16 Correct 0 ms 328 KB Output is correct
17 Correct 0 ms 328 KB Output is correct
18 Correct 0 ms 328 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 1 ms 328 KB Output is correct
22 Correct 1 ms 328 KB Output is correct
23 Correct 1 ms 328 KB Output is correct
24 Correct 1 ms 328 KB Output is correct
25 Correct 1 ms 328 KB Output is correct
26 Correct 1 ms 328 KB Output is correct
27 Correct 1 ms 328 KB Output is correct
28 Correct 0 ms 328 KB Output is correct
29 Correct 0 ms 328 KB Output is correct
30 Correct 35 ms 384 KB Output is correct
31 Correct 47 ms 376 KB Output is correct
32 Correct 35 ms 456 KB Output is correct
33 Correct 36 ms 392 KB Output is correct
34 Correct 36 ms 388 KB Output is correct
35 Correct 35 ms 448 KB Output is correct
36 Correct 39 ms 380 KB Output is correct
37 Correct 36 ms 388 KB Output is correct
38 Correct 22 ms 396 KB Output is correct
39 Correct 36 ms 448 KB Output is correct
40 Correct 34 ms 448 KB Output is correct
41 Correct 35 ms 396 KB Output is correct
42 Correct 22 ms 392 KB Output is correct
43 Correct 36 ms 448 KB Output is correct
44 Correct 37 ms 520 KB Output is correct
45 Correct 35 ms 448 KB Output is correct