oj.uz

Submission #437503

# Submission time Handle Problem Language Result Execution time Memory
437503 2021-06-26T11:49:29 Z beep_boop Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 294 ms 26108 KB 
/*
 * Created at 4:30 PM on 26 Jun, 2021
 */

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

#include <iostream>
#include <cmath>
#include <utility>
#include <vector>
#include <algorithm>
#include <cstring>
#include <map>
#include <set>
#include <numeric>
#include <cassert>

using namespace std;

#define rep(i, a, b) for(auto (i)=a;(i)<(b);(i)++)
#define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define SZ(x) (int)(x).size()
#define vt vector
#define error(x) cout << #x << " = " << (x) << '\n'
#define trav(a, x) for(auto& (a): (x))
#define UNIQUE(x) (x).resize(distance((x).begin(),unique(ALL(x))))
#define DO if(true)

//typedef long long ll;
//typedef vector<ll> vi;
//typedef pair<ll,ll> pi;
#define mp make_pair
#define pb push_back
#define eb emplace_back

//#define int ll

typedef vector<int> vi;
typedef pair<int, int> pi;

//INF value
#ifndef int
#define INF int(2e9) + 15
#else
#define INF int(1e18) + 15
#endif

//All four are primes
#define mod 1000000007
#define hash_mod 23333333377
#define MT 1004006003999
#define hash_mod2 911382323

void setIO(const string &name = "") {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    if (name.length()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}

template<typename T>
void read(vector<T> &a) {
    for (auto &x: a) cin >> x;
}

template<typename T>
void read(vector<T> &a, int n) {
    a.resize(n);
    for (auto &x: a) cin >> x;
}

template<class T, class U>
ostream &operator<<(ostream &out, const pair<T, U> &v) {
    out << "(";
    out << v.first << "," << v.second;
    return out << ")";
}

template<class T>
ostream &operator<<(ostream &out, const vector<T> &v) {
    out << "[";
    list(i, SZ(v)) {
        if (i) out << ", ";
        out << v[i];
    }
    return out << "]";
}

template<typename T>
void print(vector<T> &a) {
    for (const auto &x: a) cout << x << ' ';
    cout << '\n';
}

void MOD(int &x, int m = mod) {
    x %= m;
    if (x < 0) x += m;
}

void MOD(int64_t &x, int m = mod) {
    x %= m;
    if (x < 0) x += m;
}

#define trace(...) dbg(#__VA_ARGS__, __VA_ARGS__)

template<typename T>
void dbg(const char *name, T &&arg1) {
    cout << name << " : " << arg1 << '\n';
}

template<typename T, typename... U>
void dbg(const char *names, T &&arg1, U &&... args) {
    const char *comma = strchr(names + 1, ',');
    cout.write(names, comma - names) << " : " << arg1 << " | ";
    dbg(comma + 1, args...);
}

template<class T>
void read(T &x) {
    cin >> x;
}

template<class T, class... U>
void read(T &t, U &... u) {
    read(t);
    read(u...);
}

int gcd(int a, int b) { return !a ? b : gcd(b % a, a); }

void build(vt<vi> b);
//void build(vt<vi> b){cout << b << '\n';}

struct DSU {
    int size = 1;
    vi link, sz;

    explicit DSU(int n){
        size = n;
        link.resize(n);
        iota(ALL(link), 0);
        sz.assign(n, 1);
    }

    int find(int x){
        while (x != link[x]){
            x = link[x];
        }
        return x;
    }

    int same(int x, int y){
        return find(x) == find(y);
    }

    void unite(int x, int y){
        x = find(x), y = find(y);

        if(x == y){
            return;
        }

        if(sz[x] < sz[y]){
            swap(x, y);
        }

        sz[x] += sz[y];
        link[y] = x;
    }
};

using ll = int64_t;

#define N 1010
int n;
vt<vi> p;

int construct(vt<vi> P){
    DO {
        p = P;
        n = SZ(p);
    }

    DSU dsu(n);

    list(i, n){
        rep(j, i + 1, n){
            if(p[i][j]){
                dsu.unite(i, j);
            }
        }
    }

    vt<vi> comp(n);
    list(i, n){
        comp[dsu.find(i)].eb(i);
    }

    vt<vi> ans(n, vi(n, 0));
    vi way(n, 1);

    int x, y;
    list(i, n){
        if(SZ(comp[i]) <= 1) continue;

        rep(j, 1, SZ(comp[i])){
            x = comp[i][j];
            y = comp[i][j - 1];

            ans[x][y] = 1;
            ans[y][x] = 1;
        }

        x = comp[i].front(), y = comp[i].back();
        if(p[x][y] == 2){
            way[i] = 2;
            ans[x][y] = 1;
            ans[y][x] = 1;
        }
    }

    bool possible = true;
    list(i, n){
        if(SZ(comp[i]) <= 1) continue;

        list(j, SZ(comp[i])){
            rep(k, j + 1, SZ(comp[i])){
                possible &= (p[comp[i][j]][comp[i][k]] == way[i]);
            }
        }

        if(way[i] == 2){
            possible &= (SZ(comp[i]) > 2);
        }
    }

    if(!possible){
        return 0;
    }

    build(ans);
    return 1;
}

//int main(){
//    cout << construct(vt<vi>{vi{1, 0}, vi{0, 1}}) << '\n';
//}

Compilation message

supertrees.cpp: In function 'std::ostream& operator<<(std::ostream&, const std::vector<T>&)':
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:90:5: note: in expansion of macro 'list'
   90 |     list(i, SZ(v)) {
      |     ^~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:195:5: note: in expansion of macro 'list'
  195 |     list(i, n){
      |     ^~~~
supertrees.cpp:22:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   22 | #define rep(i, a, b) for(auto (i)=a;(i)<(b);(i)++)
      |                               ^
supertrees.cpp:196:9: note: in expansion of macro 'rep'
  196 |         rep(j, i + 1, n){
      |         ^~~
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:204:5: note: in expansion of macro 'list'
  204 |     list(i, n){
      |     ^~~~
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:212:5: note: in expansion of macro 'list'
  212 |     list(i, n){
      |     ^~~~
supertrees.cpp:22:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   22 | #define rep(i, a, b) for(auto (i)=a;(i)<(b);(i)++)
      |                               ^
supertrees.cpp:215:9: note: in expansion of macro 'rep'
  215 |         rep(j, 1, SZ(comp[i])){
      |         ^~~
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:232:5: note: in expansion of macro 'list'
  232 |     list(i, n){
      |     ^~~~
supertrees.cpp:23:29: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   23 | #define list(i, N) for(auto (i)=0;(i)<(N);(i)++)
      |                             ^
supertrees.cpp:235:9: note: in expansion of macro 'list'
  235 |         list(j, SZ(comp[i])){
      |         ^~~~
supertrees.cpp:22:31: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
   22 | #define rep(i, a, b) for(auto (i)=a;(i)<(b);(i)++)
      |                               ^
supertrees.cpp:236:13: note: in expansion of macro 'rep'
  236 |             rep(k, j + 1, SZ(comp[i])){
      |             ^~~
supertrees.cpp: In function 'void setIO(const string&)':
supertrees.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 10 ms 1332 KB Output is correct
7 Correct 241 ms 25984 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 10 ms 1332 KB Output is correct
7 Correct 241 ms 25984 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1352 KB Output is correct
13 Correct 242 ms 26020 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 122 ms 15992 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 64 ms 6724 KB Output is correct
21 Correct 233 ms 25984 KB Output is correct
22 Correct 238 ms 26052 KB Output is correct
23 Correct 264 ms 25968 KB Output is correct
24 Correct 251 ms 25992 KB Output is correct
25 Correct 122 ms 16068 KB Output is correct
26 Correct 133 ms 16068 KB Output is correct
27 Correct 288 ms 26108 KB Output is correct
28 Correct 294 ms 25972 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 10 ms 1356 KB Output is correct
9 Correct 247 ms 25960 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1356 KB Output is correct
13 Correct 239 ms 25996 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 6 ms 844 KB Output is correct
17 Correct 115 ms 16012 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 79 ms 6716 KB Output is correct
22 Correct 242 ms 25988 KB Output is correct
23 Correct 247 ms 26052 KB Output is correct
24 Correct 244 ms 26012 KB Output is correct
25 Correct 102 ms 16196 KB Output is correct
26 Correct 110 ms 16132 KB Output is correct
27 Correct 251 ms 25924 KB Output is correct
28 Correct 254 ms 25924 KB Output is correct
29 Correct 102 ms 16136 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 59 ms 6708 KB Output is correct
5 Correct 241 ms 25924 KB Output is correct
6 Correct 235 ms 26052 KB Output is correct
7 Correct 275 ms 25976 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 63 ms 6680 KB Output is correct
10 Correct 291 ms 26056 KB Output is correct
11 Correct 291 ms 25940 KB Output is correct
12 Correct 248 ms 26052 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
16 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 10 ms 1332 KB Output is correct
7 Correct 241 ms 25984 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1352 KB Output is correct
13 Correct 242 ms 26020 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 122 ms 15992 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 64 ms 6724 KB Output is correct
21 Correct 233 ms 25984 KB Output is correct
22 Correct 238 ms 26052 KB Output is correct
23 Correct 264 ms 25968 KB Output is correct
24 Correct 251 ms 25992 KB Output is correct
25 Correct 122 ms 16068 KB Output is correct
26 Correct 133 ms 16068 KB Output is correct
27 Correct 288 ms 26108 KB Output is correct
28 Correct 294 ms 25972 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 10 ms 1356 KB Output is correct
37 Correct 247 ms 25960 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 1 ms 204 KB Output is correct
40 Correct 10 ms 1356 KB Output is correct
41 Correct 239 ms 25996 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 6 ms 844 KB Output is correct
45 Correct 115 ms 16012 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 79 ms 6716 KB Output is correct
50 Correct 242 ms 25988 KB Output is correct
51 Correct 247 ms 26052 KB Output is correct
52 Correct 244 ms 26012 KB Output is correct
53 Correct 102 ms 16196 KB Output is correct
54 Correct 110 ms 16132 KB Output is correct
55 Correct 251 ms 25924 KB Output is correct
56 Correct 254 ms 25924 KB Output is correct
57 Correct 102 ms 16136 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 5 ms 972 KB Output is correct
61 Correct 115 ms 17960 KB Output is correct
62 Correct 1 ms 204 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Incorrect 28 ms 4684 KB Answer gives possible 0 while actual possible 1
66 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 10 ms 1332 KB Output is correct
7 Correct 241 ms 25984 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 10 ms 1352 KB Output is correct
13 Correct 242 ms 26020 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 122 ms 15992 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 64 ms 6724 KB Output is correct
21 Correct 233 ms 25984 KB Output is correct
22 Correct 238 ms 26052 KB Output is correct
23 Correct 264 ms 25968 KB Output is correct
24 Correct 251 ms 25992 KB Output is correct
25 Correct 122 ms 16068 KB Output is correct
26 Correct 133 ms 16068 KB Output is correct
27 Correct 288 ms 26108 KB Output is correct
28 Correct 294 ms 25972 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 1 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 10 ms 1356 KB Output is correct
37 Correct 247 ms 25960 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 1 ms 204 KB Output is correct
40 Correct 10 ms 1356 KB Output is correct
41 Correct 239 ms 25996 KB Output is correct
42 Correct 1 ms 204 KB Output is correct
43 Correct 1 ms 204 KB Output is correct
44 Correct 6 ms 844 KB Output is correct
45 Correct 115 ms 16012 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 79 ms 6716 KB Output is correct
50 Correct 242 ms 25988 KB Output is correct
51 Correct 247 ms 26052 KB Output is correct
52 Correct 244 ms 26012 KB Output is correct
53 Correct 102 ms 16196 KB Output is correct
54 Correct 110 ms 16132 KB Output is correct
55 Correct 251 ms 25924 KB Output is correct
56 Correct 254 ms 25924 KB Output is correct
57 Correct 102 ms 16136 KB Output is correct
58 Correct 1 ms 204 KB Output is correct
59 Correct 1 ms 204 KB Output is correct
60 Correct 1 ms 204 KB Output is correct
61 Correct 59 ms 6708 KB Output is correct
62 Correct 241 ms 25924 KB Output is correct
63 Correct 235 ms 26052 KB Output is correct
64 Correct 275 ms 25976 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 63 ms 6680 KB Output is correct
67 Correct 291 ms 26056 KB Output is correct
68 Correct 291 ms 25940 KB Output is correct
69 Correct 248 ms 26052 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Correct 1 ms 204 KB Output is correct
72 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
73 Halted 0 ms 0 KB -