oj.uz

Submission #1109247

# Submission time Handle Problem Language Result Execution time Memory
1109247 2024-11-06T09:07:37 Z Yang8on Džumbus (COCI19_dzumbus) C++17
50 / 110
 34 ms 19272 KB 
#include <bits/stdc++.h>
#define Y8o "dzumbus"
#define maxn (int) 1005
#define ll long long
#define fi(i, a, b) for(int i = a; i <= b; i ++)
#define fid(i, a, b) for(int i = a; i >= b; i --)
#define pii pair<int, int>
#define gb(i, j) ((i >> j) & 1)
#define int long long

using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll GetRandom(ll l, ll r) {
    return uniform_int_distribution<ll> (l, r) (rng);
}

const ll INF = 1e18;

int n, m, Q;
int a[maxn], sz[maxn], dd[maxn];
vector<int> o[maxn];
ll dp[maxn][maxn][2], tmp[maxn][2];
int ans[maxn];
vector<pair<ll, int>> cur;

void dfs(int u, int p = 0) {
    dd[u] = sz[u] = 1;
    dp[u][0][0] = 0;

    for(int v : o[u]) if(v != p) {
        dfs(v, u);

        memset(tmp, 0x3f, sizeof tmp);
        fi(i, 0, sz[u]) {
            fi(j, 0, sz[v]) {
                tmp[i + j][0] = min( tmp[i + j][0],
                                     dp[u][i][0] + min(dp[v][j][0], dp[v][j][1]) );

                tmp[i + j][1] = min( tmp[i + j][1],
                                     dp[u][i][1] + min(dp[v][j][0], dp[v][j][1]) );

                if(i + j + 1 <= sz[u] + sz[v])
                tmp[i + j + 1][1] = min( tmp[i + j + 1][1],
                                         dp[u][i][0] + dp[v][j][1] + a[u] );

                if(i + j + 1 <= sz[u] + sz[v])
                tmp[i + j + 1][1] = min( tmp[i + j + 1][1],
                                         dp[u][i][1] + dp[v][j][0] + a[v] );

                if(i + j + 2 <= sz[u] + sz[v])
                tmp[i + j + 2][1] = min( tmp[i + j + 2][1],
                                         dp[u][i][0] + dp[v][j][0] + a[u] + a[v] );
            }
        }
        memcpy(dp[u], tmp, sizeof tmp);
        sz[u] += sz[v];
    }
}

void solve() {
    cin >> n >> m;
    fi(i, 1, n) cin >> a[i];
    fi(i, 1, m) {
        int u, v; cin >> u >> v;
        o[u].push_back(v), o[v].push_back(u);
    }

    memset(dp, 0x3f, sizeof dp);

    fi(i, 1, n) if(!dd[i]) {
        dfs(i);
        fi(j, 2, n) {
            ll res = min({ dp[i][j][0], dp[i][j][1] });
            cur.push_back({ res, j });
        }
    }

    sort(cur.begin(), cur.end());

    int pre = 0;
    fi(i, 0, (int)cur.size() - 1) {
        ans[i] = max(pre, cur[i].second);
        pre = ans[i];
    }

    cin >> Q;
    fi(i, 1, Q) {
        ll lim; cin >> lim;
        int l = 0, r = cur.size() - 1;
        while(l <= r) {
            int mid = (l + r) >> 1;
            if(cur[mid].first <= lim) l = mid + 1;
            else r = mid - 1;
        }
        cout << ans[r] << '\n';
    }
}

 main() {
    ios_base::sync_with_stdio(0);
    cin.tie(NULL), cout.tie(NULL);

    if(fopen(Y8o".inp", "r")) {
        freopen(Y8o".inp", "r", stdin);
//        freopen(Y8o".out", "w", stdout);
    }

    int nTest = 1;
//    cin >> nTest;

    while(nTest --) {
        solve();
    }

    return 0;
}

Compilation message

dzumbus.cpp:100:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  100 |  main() {
      |  ^~~~
dzumbus.cpp: In function 'int main()':
dzumbus.cpp:105:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |         freopen(Y8o".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16464 KB Output is correct
2 Correct 7 ms 16464 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16464 KB Output is correct
2 Correct 7 ms 16464 KB Output is correct
3 Correct 30 ms 18512 KB Output is correct
4 Correct 34 ms 19272 KB Output is correct
5 Correct 34 ms 18760 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 18348 KB Output is correct
2 Incorrect 27 ms 17992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 16464 KB Output is correct
2 Correct 7 ms 16464 KB Output is correct
3 Correct 30 ms 18512 KB Output is correct
4 Correct 34 ms 19272 KB Output is correct
5 Correct 34 ms 18760 KB Output is correct
6 Correct 28 ms 18348 KB Output is correct
7 Incorrect 27 ms 17992 KB Output isn't correct
8 Halted 0 ms 0 KB -