Submission #1081078

#	Time	Username	Problem	Language	Result	Execution time	Memory
1081078		wibulord	Džumbus (COCI19_dzumbus)	C++14	110 / 110	42 ms	19180 KiB

dzumbus

#include <bits/stdc++.h>
#define endl '\n'
#define ll long long
#define fi first
#define se second
#define pb emplace_back
#define ii pair<int, int>
#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)
#define sz(s) (int)((s).size())
#define all(a) a.begin(), a.end()
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define F0R(i, b) for (int i = 0, _b = (b); i < _b; ++i)
#define FORd(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define F0Rd(i, b) for (int i = (b)-1; i >= 0; i--)
#define debug(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
using namespace std;

template<typename T1,typename T2> bool ckmax(T1 &x,const T2 &y){if(x<y){x=y; return 1;} return 0;}
template<typename T1,typename T2> bool ckmin(T1 &x,const T2 &y){if(y<x){x=y; return 1;} return 0;}

const int MOD = (int)1e9 + 7;
const int mod = 998244353;
const int N = 1e3 + 10, M = 18;
const long long INF = (long long)1e18 + 11;

/*
     /\_/\
    (= ._.)
    / >?  \>$
*/

mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
long long rand(long long l, long long r){
    return l + rd() % (r - l + 1);
}

int n, m, q;
int A[N], s[N];
vector<int> adj[N];
long long F[N][N][2], res[N];

void DFS(int u, int p = -1){
    s[u] = 1;
    for(int v : adj[u]) if(v != p) DFS(v, u);
}

void dfs(int u, int p = -1){
    F[u][0][0] = 0;
    for(int v : adj[u]) if(v != p){
        dfs(v, u);
        FORd(i, s[u], 0) FORd(j, s[v], 0){
            F[u][i+j][0] = min(F[u][i+j][0], F[u][i][0] + min(F[v][j][0], F[v][j][1]));
            F[u][i+j][1] = min(F[u][i+j][1], F[u][i][1] + min(F[v][j][0], F[v][j][1]));
            if(i+j+1 <= s[u]+s[v]){
                F[u][i+j+1][1] = min(F[u][i+j+1][1], F[u][i][0] + F[v][j][1] + A[u]);
                F[u][i+j+1][1] = min(F[u][i+j+1][1], F[u][i][1] + F[v][j][0] + A[v]);
            }
            if(i+j+2 <= s[u]+s[v]) F[u][i+j+2][1] = min(F[u][i+j+2][1], F[u][i][0] + F[v][j][0] + A[u] + A[v]);
        }
        s[u] += s[v];
    }
}

void sol(void){
    cin >> n >> m;
    FOR(i, 1, n) cin >> A[i];
    FOR(i, 1, m){
        int u, v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }

    A[0] = MOD;
    FOR(i, 1, n) if(s[i] == 0){
        DFS(i);
        adj[i].pb(0), adj[0].pb(i);
    }
    FOR(i, 0, n) FOR(j, 0, n) FOR(k, 0, 1) F[i][j][k] = INF;
    dfs(0);

    res[n] = F[0][n][0];
    for(int i = n-1; i >= 1; i--) res[i] = min(res[i+1], F[0][i][0]);
    cin >> q;
    while(q--){
        int s; cin >> s;
        int p = upper_bound(res+1,res+n+1,s) - res - 1;
        cout << p << '\n';
    }
}

signed main(void){
    #define TASK "nhap"
    if(fopen(TASK".inp", "r")){
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int t = 1;
//    cin >> t;
    while(t--) sol();
    cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << " ms\n";
}

Compilation message (stderr)

dzumbus.cpp: In function 'int main()':
dzumbus.cpp:94:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
dzumbus.cpp:95:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 30 / 30
• Subtask 4: 30 / 30