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Submission #967043

# Submission time Handle Problem Language Result Execution time Memory
967043 2024-04-21T04:47:51 Z steveonalex Duathlon (APIO18_duathlon) C++17
0 / 100
 30 ms 11612 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define ALL(v) (v).begin(), (v).end()
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
 
// mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return ((ull) rng()) % (r - l + 1) + l;}
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return mask & (-mask);}
ll pop_cnt(ll mask){return __builtin_popcountll(mask);}
ll ctz(ll mask){return __builtin_ctzll(mask);}
ll clz(ll mask){return __builtin_clzll(mask);}
ll logOf(ll mask){return 63 - clz(mask);}
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b){a = b; return true;}
        return false;
    }
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b){a = b; return true;}
        return false;
    }
template <class T>
    void printArr(T& a, string separator = " ", string finish = "\n", ostream& out = cout){
        for(auto i: a) out << i << separator;
        out << finish;
    }
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

const int N = 1e5 + 69;
int n, m;
vector<int> graph[N];
int sz[N];
ll ans = 0;

void dfs(int u,int p){
    sz[u] = 1;
    for(int v: graph[u]) if (v != p){
        dfs(v, u);
        sz[u] += sz[v];
        ans += 1LL * sz[v] * (n - sz[v]);
    }
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m;
    if (m != n - 1) return -1;
    for(int i= 0; i<m; ++i){
        int u, v; cin >> u >> v;
        graph[u].push_back(v);
        graph[v].push_back(u);
    }

    dfs(1, 1);

    ans -= 1LL * n * (n-1) / 2;
    ans *= 2;
    cout << ans << "\n";

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 3164 KB Output is correct
2 Correct 2 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 6 ms 2908 KB Output is correct
6 Correct 1 ms 2908 KB Output is correct
7 Correct 1 ms 2908 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 2 ms 2908 KB Output is correct
10 Runtime error 2 ms 2908 KB Execution failed because the return code was nonzero
11 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 7508 KB Output is correct
2 Correct 24 ms 7504 KB Output is correct
3 Correct 25 ms 7508 KB Output is correct
4 Correct 24 ms 7516 KB Output is correct
5 Correct 24 ms 7500 KB Output is correct
6 Correct 28 ms 11612 KB Output is correct
7 Correct 27 ms 10324 KB Output is correct
8 Correct 27 ms 9560 KB Output is correct
9 Correct 27 ms 8984 KB Output is correct
10 Runtime error 1 ms 2904 KB Execution failed because the return code was nonzero
11 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2908 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 7464 KB Output is correct
2 Correct 25 ms 7516 KB Output is correct
3 Runtime error 1 ms 3040 KB Execution failed because the return code was nonzero
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 2908 KB Execution failed because the return code was nonzero
2 Halted 0 ms 0 KB -