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답안 #301446

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
301446 2020-09-18T00:55:38 Z qpwoeirut 슈퍼트리 잇기 (IOI20_supertrees) C++17
21 / 100
 282 ms 22268 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

typedef vector<vector<int>> vvi;

const int MN = 1001;
int N;

int root[MN];
int par(int u) {
    if (u == root[u]) return u;
    root[u] = par(root[u]);
    return root[u];
}
void join(int u, int v) {
    int ru = par(u), rv = par(v);
    if (ru == rv) return;
    root[ru] = rv;
}
bool dsu(const vvi& p) {
    for (int i=0; i<N; ++i) {
        root[i] = i;
    }
    for (int i=0; i<N; ++i) {
        for (int j=0; j<N; ++j) {
            if (p[i][j]) join(i, j);
        }
    }
    
    for (int i=0; i<N; ++i) {
        for (int j=0; j<N; ++j) {
            if (par(i) == par(j) && p[i][j] == 0) {
                return 0;
            }
        }
    }
    return 1;
}
int sub2(const vvi& p) {
    if (!dsu(p)) return 0;
    vvi ans(N, vector<int>(N));
    for (int i=0; i<N; ++i) {
        if (i != par(i)) {
            ans[i][par(i)] = true;
            ans[par(i)][i] = true;
        }
    }
    build(ans);
    return 1;
}
int sub3(const vvi& p) {
    if (!dsu(p)) return 0;
    vvi ans(N, vector<int>(N));
    vvi groups;
    for (int i=0; i<N; ++i) {
        if (i == par(i)) {
            vector<int> cur;
            for (int j=0; j<N; ++j) {
                if (i == par(j)) {
                    cur.push_back(j);
                }
            }
            groups.push_back(cur);
        }
    }
    for (int i=0; i<groups.size(); ++i) {
        int gsz = groups[i].size();
        if (gsz == 1) continue;
        if (gsz == 2) return 0;
        for (int j=0; j<gsz; ++j) {
            ans[groups[i][(j+1) % gsz]][groups[i][j]] = ans[groups[i][j]][groups[i][(j+1) % gsz]] = 1;
        }
    }

    build(ans);
    return 1;
}

int construct(std::vector<std::vector<int>> p) {
	N = p.size();

    set<int> vals;
    for (int i=0; i<N; ++i) {
        for (int j=0; j<N; ++j) {
            vals.insert(p[i][j]);
        }
    }

    if (vals.size() <= 2) {
        if (vals.count(1)) {
            return sub2(p);
        }
    }
    if (vals.count(2)) {
        return sub3(p);
    }
    return 0;
}

Compilation message

supertrees.cpp: In function 'int sub3(const vvi&)':
supertrees.cpp:68:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for (int i=0; i<groups.size(); ++i) {
      |                   ~^~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 282 ms 22136 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 282 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 252 ms 22140 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 120 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 61 ms 5752 KB Output is correct
21 Correct 246 ms 22108 KB Output is correct
22 Correct 241 ms 22136 KB Output is correct
23 Correct 272 ms 22268 KB Output is correct
24 Correct 238 ms 22264 KB Output is correct
25 Correct 105 ms 8184 KB Output is correct
26 Correct 101 ms 8184 KB Output is correct
27 Correct 264 ms 22140 KB Output is correct
28 Correct 239 ms 22136 KB Output is correct

Subtask #3
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Incorrect 1 ms 256 KB Too few ways to get from 0 to 1, should be 2 found 1
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 282 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 252 ms 22140 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 120 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 61 ms 5752 KB Output is correct
21 Correct 246 ms 22108 KB Output is correct
22 Correct 241 ms 22136 KB Output is correct
23 Correct 272 ms 22268 KB Output is correct
24 Correct 238 ms 22264 KB Output is correct
25 Correct 105 ms 8184 KB Output is correct
26 Correct 101 ms 8184 KB Output is correct
27 Correct 264 ms 22140 KB Output is correct
28 Correct 239 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 1 ms 256 KB Output is correct
32 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 10 ms 1152 KB Output is correct
7 Correct 282 ms 22136 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 10 ms 1152 KB Output is correct
13 Correct 252 ms 22140 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 120 ms 8184 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 61 ms 5752 KB Output is correct
21 Correct 246 ms 22108 KB Output is correct
22 Correct 241 ms 22136 KB Output is correct
23 Correct 272 ms 22268 KB Output is correct
24 Correct 238 ms 22264 KB Output is correct
25 Correct 105 ms 8184 KB Output is correct
26 Correct 101 ms 8184 KB Output is correct
27 Correct 264 ms 22140 KB Output is correct
28 Correct 239 ms 22136 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 0 ms 256 KB Output is correct
31 Correct 1 ms 256 KB Output is correct
32 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -