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Submission #428996

# Submission time Handle Problem Language Result Execution time Memory
428996 2021-06-15T16:20:35 Z proma Swapping Cities (APIO20_swap) C++17
17 / 100
 2000 ms 14764 KB 
#include <bits/stdc++.h>

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

using namespace std;

const int MAX = 1e5+5;

int n, m, used[MAX];
vector <pair <int, int>> g[MAX];

void init (int N, int M, vector <int> U, vector <int> V, vector <int> W) {
    n = N;
    m = M;
    int inf = 0;
    for (int i = 0; i < M; i ++) {
        g[U[i]].push_back({V[i], W[i]});
        g[V[i]].push_back({U[i], W[i]});
    }
}

void dfs (int v, int p, int k, int& flag){
    used[v] = 1;
    int deg = 0;
    for (auto i: g[v]) {
        if (i.second <= k and i.first != p and used[i.first] == 1)
            flag = 1;
        if (i.second <= k and !used[i.first])
            dfs(i.first, v, k, flag);
        if (i.second <= k)
            deg ++;
    }
    if (deg >= 3) flag = 1;
    used[v] = 2;
}

bool isPossible (int a, int b, int k) {
    memset(used, 0, sizeof(used));
    int flag = 0;
    dfs(a, -1, k, flag);
    if (flag and used[b]) return true;
    else return false;
}

int getMinimumFuelCapacity (int X, int Y) {
    int l = 1, r = 1e9, best = -1;
    while (l <= r) {
        int mid = (l + r) / 2;
        if (isPossible(X, Y, mid)) {
            best = mid;
            r = mid - 1;
        }
        else {
            l = mid + 1;
        }
    }
    return best;
}

Compilation message

swap.cpp:4: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    4 | #pragma GCC optimization ("O3")
      | 
swap.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization ("unroll-loops")
      | 
swap.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
swap.cpp:17:9: warning: unused variable 'inf' [-Wunused-variable]
   17 |     int inf = 0;
      |         ^~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Correct 4 ms 3020 KB Output is correct
4 Correct 6 ms 3020 KB Output is correct
5 Correct 6 ms 3020 KB Output is correct
6 Correct 7 ms 3020 KB Output is correct
7 Correct 7 ms 3148 KB Output is correct
8 Correct 8 ms 3148 KB Output is correct
9 Correct 326 ms 12440 KB Output is correct
10 Correct 1025 ms 13924 KB Output is correct
11 Correct 1624 ms 14160 KB Output is correct
12 Correct 1438 ms 13936 KB Output is correct
13 Execution timed out 2062 ms 14764 KB Time limit exceeded

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Execution timed out 2076 ms 10060 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Correct 4 ms 3020 KB Output is correct
4 Correct 6 ms 3020 KB Output is correct
5 Correct 6 ms 3020 KB Output is correct
6 Correct 7 ms 3020 KB Output is correct
7 Correct 7 ms 3148 KB Output is correct
8 Correct 8 ms 3148 KB Output is correct
9 Correct 4 ms 3020 KB Output is correct
10 Correct 9 ms 3020 KB Output is correct
11 Correct 8 ms 3148 KB Output is correct
12 Correct 8 ms 3048 KB Output is correct
13 Correct 7 ms 3036 KB Output is correct
14 Correct 6 ms 3048 KB Output is correct
15 Correct 7 ms 3128 KB Output is correct
16 Correct 8 ms 3148 KB Output is correct
17 Correct 8 ms 3148 KB Output is correct
18 Correct 7 ms 3020 KB Output is correct
19 Correct 6 ms 3048 KB Output is correct
20 Correct 8 ms 3160 KB Output is correct
21 Correct 8 ms 3020 KB Output is correct
22 Correct 7 ms 3148 KB Output is correct
23 Correct 6 ms 3020 KB Output is correct
24 Correct 7 ms 3148 KB Output is correct
25 Correct 8 ms 3148 KB Output is correct
26 Correct 11 ms 3148 KB Output is correct
27 Correct 7 ms 3160 KB Output is correct
28 Correct 8 ms 3176 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Correct 3 ms 3020 KB Output is correct
4 Correct 4 ms 3020 KB Output is correct
5 Correct 6 ms 3020 KB Output is correct
6 Correct 6 ms 3020 KB Output is correct
7 Correct 7 ms 3020 KB Output is correct
8 Correct 7 ms 3148 KB Output is correct
9 Correct 8 ms 3148 KB Output is correct
10 Correct 326 ms 12440 KB Output is correct
11 Correct 1025 ms 13924 KB Output is correct
12 Correct 1624 ms 14160 KB Output is correct
13 Correct 1438 ms 13936 KB Output is correct
14 Execution timed out 2062 ms 14764 KB Time limit exceeded

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Correct 4 ms 3020 KB Output is correct
4 Correct 6 ms 3020 KB Output is correct
5 Correct 6 ms 3020 KB Output is correct
6 Correct 7 ms 3020 KB Output is correct
7 Correct 7 ms 3148 KB Output is correct
8 Correct 8 ms 3148 KB Output is correct
9 Correct 326 ms 12440 KB Output is correct
10 Correct 1025 ms 13924 KB Output is correct
11 Correct 1624 ms 14160 KB Output is correct
12 Correct 1438 ms 13936 KB Output is correct
13 Execution timed out 2062 ms 14764 KB Time limit exceeded

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3020 KB Output is correct
2 Correct 3 ms 3020 KB Output is correct
3 Correct 3 ms 3020 KB Output is correct
4 Correct 4 ms 3020 KB Output is correct
5 Correct 6 ms 3020 KB Output is correct
6 Correct 6 ms 3020 KB Output is correct
7 Correct 7 ms 3020 KB Output is correct
8 Correct 7 ms 3148 KB Output is correct
9 Correct 8 ms 3148 KB Output is correct
10 Correct 326 ms 12440 KB Output is correct
11 Correct 1025 ms 13924 KB Output is correct
12 Correct 1624 ms 14160 KB Output is correct
13 Correct 1438 ms 13936 KB Output is correct
14 Execution timed out 2062 ms 14764 KB Time limit exceeded