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Submission #260948

# Submission time Handle Problem Language Result Execution time Memory
260948 2020-08-11T08:23:02 Z 2qbingxuan Duathlon (APIO18_duathlon) C++17
23 / 100
 112 ms 10872 KB 
#include <bits/stdc++.h>
#ifdef local
#define debug(...) qqbx(#__VA_ARGS__, __VA_ARGS__)
template <typename H, typename ...T> void qqbx(const char *s, const H &h, T ...args) {
    for(; *s && *s != ','; ++s) if(*s != ' ') std::cerr << *s;
    std::cerr << " = " << h << (sizeof...(T) ? ", " : "\n");
    if constexpr(sizeof...(T)) qqbx(++s, args...);
}
#define safe std::cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#endif // local
#define pb emplace_back
#define sort_uni(v) sort(begin(v),end(v)),v.erase(unique(begin(v),end(v)),end(v))

using namespace std;
typedef long long ll;
const int N = 100025;

vector<int> g[N];
int vis[N];
ll ans = 0;
int dfs(int i) {
    int s = 1;
    vis[i] = 1;
    for(int j: g[i]) if(!vis[j]) s += dfs(j);
    return s;
}
int dfs2(int i, int n) {
    int s = 0;
    vis[i] = -1;
    for(int j: g[i]) if(~vis[j]) {
        int t = dfs2(j, n);
        ans += 1LL * t * s;
        s += t;
    }
    ans += 1LL * s * (n-s-1);
    return ++s;
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n, m;
    cin >> n >> m;
    for(int i = 0; i < m; i++) {
        int a, b;
        cin >> a >> b;
        g[a].pb(b), g[b].pb(a);
    }
    for(int i = 1; i <= n; i++) if(!vis[i]) {
        int s = dfs(i);
        dfs2(i, s);
    }
    cout << ans*2 << '\n';
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 99 ms 10872 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2688 KB Output is correct
2 Correct 2 ms 2720 KB Output is correct
3 Correct 3 ms 2688 KB Output is correct
4 Correct 2 ms 2688 KB Output is correct
5 Correct 3 ms 2688 KB Output is correct
6 Correct 2 ms 2688 KB Output is correct
7 Correct 2 ms 2688 KB Output is correct
8 Correct 2 ms 2688 KB Output is correct
9 Correct 2 ms 2688 KB Output is correct
10 Correct 2 ms 2688 KB Output is correct
11 Correct 2 ms 2688 KB Output is correct
12 Correct 2 ms 2688 KB Output is correct
13 Correct 2 ms 2688 KB Output is correct
14 Correct 2 ms 2688 KB Output is correct
15 Correct 2 ms 2688 KB Output is correct
16 Correct 2 ms 2688 KB Output is correct
17 Correct 2 ms 2688 KB Output is correct
18 Correct 2 ms 2688 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 2 ms 2688 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 77 ms 6264 KB Output is correct
2 Correct 100 ms 7056 KB Output is correct
3 Correct 83 ms 7032 KB Output is correct
4 Correct 84 ms 7052 KB Output is correct
5 Correct 89 ms 7036 KB Output is correct
6 Correct 112 ms 9592 KB Output is correct
7 Correct 75 ms 8572 KB Output is correct
8 Correct 98 ms 8184 KB Output is correct
9 Correct 81 ms 7800 KB Output is correct
10 Correct 58 ms 7032 KB Output is correct
11 Correct 78 ms 7032 KB Output is correct
12 Correct 71 ms 7032 KB Output is correct
13 Correct 76 ms 7032 KB Output is correct
14 Correct 68 ms 6904 KB Output is correct
15 Correct 52 ms 6776 KB Output is correct
16 Correct 36 ms 5888 KB Output is correct
17 Correct 42 ms 7280 KB Output is correct
18 Correct 42 ms 7280 KB Output is correct
19 Correct 41 ms 7276 KB Output is correct
20 Correct 52 ms 7356 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2688 KB Output is correct
2 Correct 3 ms 2688 KB Output is correct
3 Incorrect 2 ms 2688 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 6368 KB Output is correct
2 Correct 88 ms 6904 KB Output is correct
3 Incorrect 106 ms 7032 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -