oj.uz

Submission #835956

# Submission time Handle Problem Language Result Execution time Memory
835956 2023-08-24T00:51:02 Z maomao90 Connecting Supertrees (IOI20_supertrees) C++17
19 / 100
 169 ms 25992 KB 
// I can do all things through Christ who strengthens me
// Philippians 4:13

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

#define REP(i, j, k) for (int i = j; i < (k); i++)
#define RREP(i, j, k) for (int i = j; i >= (k); i--)

template <class T>
inline bool mnto(T &a, const T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T &a, const T b) {return a < b ? a = b, 1 : 0;}

typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define ALL(x) x.begin(), x.end()
#define SZ(x) (int) x.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef tuple<int, int, int> iii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005;
const int MAXN = 1005;

int n;
vector<vi> g;
vector<vi> ans;
bool vis[MAXN];

bool inc[MAXN];
bool solve(vi comp) {
    if (SZ(comp) == 1) {
        return 1;
    }
    vi cyc, line;
    for (int i : comp) {
        bool all2 = 1;
        for (int j : comp) {
            if (i == j) {
                continue;
            }
            if (g[i][j] != 2) {
                all2 = 0;
                break;
            }
        }
        if (all2) {
            cyc.pb(i);
        } else {
            line.pb(i);
        }
    }
    for (int i : line) {
        if (inc[i]) {
            continue;
        }
        vi chain;
        for (int j : line) {
            if (i == j) {
                continue;
            }
            if (g[i][j] == 1) {
                chain.pb(j);
            }
        }
        for (int j : chain) {
            inc[j] = 1;
            for (int k : line) {
                if (g[i][k] != g[j][k]) {
                    return 0;
                }
            }
        }
        REP (j, 0, SZ(chain) - 1) {
            ans[chain[j]][chain[j + 1]] = 1;
            ans[chain[j + 1]][chain[j]] = 1;
        }
        cyc.pb(chain[0]);
        if (SZ(chain) == SZ(comp)) {
            return 1;
        }
    }
    if (SZ(cyc) <= 2) {
        return 0;
    }
    REP (i, 0, SZ(cyc)) {
        ans[cyc[i]][cyc[(i + 1) % SZ(cyc)]] = 1;
        ans[cyc[(i + 1) % SZ(cyc)]][cyc[i]] = 1;
    }
    return 1;
    /*
    if (SZ(cyc) == 1) {
        return 0;
    }
    REP (i, 0, SZ(line) - 1) {
        ans[line[i]][line[i + 1]] = 1;
        ans[line[i + 1]][line[i]] = 1;
    }
    if (!cyc.empty()) {
        REP (i, 0, SZ(cyc) - 1) {
            ans[cyc[i]][cyc[i + 1]] = 1;
            ans[cyc[i + 1]][cyc[i]] = 1;
        }
        ans[line[0]][cyc[0]] = 1;
        ans[cyc[0]][line[0]] = 1;
        ans[line[0]][cyc.back()] = 1;
        ans[cyc.back()][line[0]] = 1;
    }
    */
    return 1;
}

int construct(vector<vi> p) {
    n = SZ(p);
    ans = vector<vi>(n, vi(n, 0));
    g = p;
    REP (i, 0, n) {
        REP (j, 0, n) {
            if (g[i][j] == 3) {
                return 0;
            }
        }
    }
    REP (i, 0, n) {
        if (vis[i]) {
            continue;
        }
        vi comp;
        REP (j, 0, n) {
            if (g[i][j]) {
                comp.pb(j);
            }
        }
        for (int j : comp) {
            vis[j] = 1;
            REP (k, 0, n) {
                if ((g[j][k] > 0) != (g[i][k] > 0)) {
                    return 0;
                }
            }
        }
        if (!solve(comp)) {
            return 0;
        }
    }
    build(ans);
    return 1;
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 7 ms 1356 KB Output is correct
9 Correct 169 ms 25884 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1312 KB Output is correct
13 Correct 166 ms 25984 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 73 ms 16004 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 39 ms 6720 KB Output is correct
22 Correct 159 ms 25916 KB Output is correct
23 Correct 159 ms 25992 KB Output is correct
24 Correct 164 ms 25960 KB Output is correct
25 Correct 68 ms 16024 KB Output is correct
26 Correct 63 ms 16020 KB Output is correct
27 Correct 155 ms 25992 KB Output is correct
28 Correct 164 ms 25932 KB Output is correct
29 Correct 62 ms 16020 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 0 ms 212 KB Answer gives possible 0 while actual possible 1
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -