oj.uz

Submission #437485

# Submission time Handle Problem Language Result Execution time Memory
437485 2021-06-26T11:24:39 Z beep_boop Connecting Supertrees (IOI20_supertrees) C++17
21 / 100
 267 ms 28104 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));

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

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

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

    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:211:5: note: in expansion of macro 'list'
  211 |     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:212:9: note: in expansion of macro 'rep'
  212 |         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:222:5: note: in expansion of macro 'list'
  222 |     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:223:9: note: in expansion of macro 'list'
  223 |         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:224:13: note: in expansion of macro 'rep'
  224 |             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 11 ms 1348 KB Output is correct
7 Correct 239 ms 25988 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 11 ms 1348 KB Output is correct
7 Correct 239 ms 25988 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 227 ms 25992 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 948 KB Output is correct
17 Correct 122 ms 18036 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 57 ms 7364 KB Output is correct
21 Correct 241 ms 27972 KB Output is correct
22 Correct 228 ms 27972 KB Output is correct
23 Correct 251 ms 27900 KB Output is correct
24 Correct 236 ms 28028 KB Output is correct
25 Correct 118 ms 18116 KB Output is correct
26 Correct 100 ms 17988 KB Output is correct
27 Correct 267 ms 28104 KB Output is correct
28 Correct 222 ms 27896 KB Output is correct

Subtask #3
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 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
6 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
3 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 11 ms 1348 KB Output is correct
7 Correct 239 ms 25988 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 227 ms 25992 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 948 KB Output is correct
17 Correct 122 ms 18036 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 57 ms 7364 KB Output is correct
21 Correct 241 ms 27972 KB Output is correct
22 Correct 228 ms 27972 KB Output is correct
23 Correct 251 ms 27900 KB Output is correct
24 Correct 236 ms 28028 KB Output is correct
25 Correct 118 ms 18116 KB Output is correct
26 Correct 100 ms 17988 KB Output is correct
27 Correct 267 ms 28104 KB Output is correct
28 Correct 222 ms 27896 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 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
34 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 11 ms 1348 KB Output is correct
7 Correct 239 ms 25988 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 227 ms 25992 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 948 KB Output is correct
17 Correct 122 ms 18036 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 57 ms 7364 KB Output is correct
21 Correct 241 ms 27972 KB Output is correct
22 Correct 228 ms 27972 KB Output is correct
23 Correct 251 ms 27900 KB Output is correct
24 Correct 236 ms 28028 KB Output is correct
25 Correct 118 ms 18116 KB Output is correct
26 Correct 100 ms 17988 KB Output is correct
27 Correct 267 ms 28104 KB Output is correct
28 Correct 222 ms 27896 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 Incorrect 1 ms 204 KB Answer gives possible 0 while actual possible 1
34 Halted 0 ms 0 KB -