Submission #524620

#	Time	Username	Problem	Language	Result	Execution time	Memory
524620		Dirii	Džumbus (COCI19_dzumbus)	C++14	110 / 110	49 ms	19032 KiB

dzumbus

// #pragma GCC target("avx2")
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define ll long long
#define cll const ll
#define lp(a, b, c) for(ll a = b; a <= c; ++a)
#define lpd(a, b, c) for(ll a = b; a >= c; --a)
#define vec(a) vector<a>
#define pp(a, b) pair<a, b>
#define EACHCASE lpd(cs, read(), 1)
#define Fname "f"
using namespace std;

template <typename T> inline void Read(T &x){
    x = 0; char c;
    ll dau = 1;
    while(!isdigit(c = getchar())) if(c == '-') dau = -1;
    do{
        x = x * 10 + c - '0';
    } while (isdigit(c = getchar()));
    x *= dau;
}

ll read(){
    ll tmp;
    cin >> tmp;
    return tmp;
}

void giuncute(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}

void OF(){
    if(fopen(Fname".inp", "r")){
        freopen(Fname".inp", "r", stdin);
        freopen(Fname".out", "w", stdout);
    } else if(fopen(Fname".in", "r")){
        freopen(Fname".in", "r", stdin);
        freopen(Fname".out", "w", stdout);
    }
}

cll mxn = 1e3 + 4;
ll n, m, a[mxn], dp[mxn][mxn][2] = {{{0}}}, sz[mxn] = {0}, ans[mxn];
vec(ll) g[mxn];

void dfs(ll u, ll p){
    sz[u] = 1;
    lp(i, 0, n) lp(j, 0, 1) dp[u][i][j] = 1e16;
    dp[u][0][0] = 0;
    // cerr << u << ' ';
    /*
        dp[u][sum][0] = min(dp[u][sum][0], min(dp[v][j][0], dp[v][j][1]) + dp[u][i][0]) 
        dp[u][sum][1] = min({
            dp[u][sum][1],
            min(dp[v][j][0], dp[v][j][1]) + dp[u][i][1],
            dp[v][j][1] + a[u] + dp[u][i - 1][0],
            dp[v][j - 1][0] + a[u] + a[v] + dp[u][i - 1][0]
        })
    */
    for(ll v : g[u]){
        if(v == p) continue;
        dfs(v, u);
        lpd(i, sz[u], 0) lpd(j, sz[v], 0){
            ll sum = i + j;
            dp[u][sum][0] = min(dp[u][sum][0], min(dp[v][j][0], dp[v][j][1]) + dp[u][i][0]);
            if(i) dp[u][sum][1] = min({
                dp[u][sum][1], 
                min(dp[v][j][0], dp[v][j][1]) + dp[u][i][1],
                dp[v][j][1] + a[u] + dp[u][i - 1][0]
            });
            if(i && j) dp[u][sum][1] = min({
                dp[u][sum][1], 
                dp[v][j - 1][0] + a[u] + a[v] + dp[u][i - 1][0],
                dp[v][j - 1][0] + a[v] + dp[u][i][1]
            });
        }
        sz[u] += sz[v];
    }
}

int main(){
    giuncute();
    #ifndef ONLINE_JUDGE
    OF();
    #endif
    cin >> n >> m;
    lp(i, 1, n) cin >> a[i];
    lp(i, 1, m){
        static ll u, v;
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    lp(i, 1, n) ans[i] = 1e16;
    ans[0] = 0;
    lp(i, 1, n) if(!sz[i]){
        dfs(i, -1);
        lpd(tot, n, 2){
            lp(j, 0, sz[i]){
                if(tot < j) break;
                ans[tot] = min(ans[tot], min(dp[i][j][0], dp[i][j][1]) + ans[tot - j]);
            }
        }
    }
    // lp(i, 0, n) cerr << dp[1][i][0] << ' ' << dp[1][i][1] << ' ' << i << '\n';
    // lp(i, 0, n) cerr << ans[i] << ' ' << i << '\n';
    EACHCASE{
        static ll s;
        cin >> s;
        ll l = 2, r = n, res = 0;
        while(l <= r){
            ll mid = (l + r) >> 1;
            if(ans[mid] <= s) res = mid, l = mid + 1;
            else r = mid - 1;
        }
        cout << res << '\n';
    }
}

Compilation message (stderr)

dzumbus.cpp: In function 'void OF()':
dzumbus.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(Fname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
dzumbus.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(Fname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
dzumbus.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen(Fname".in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
dzumbus.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         freopen(Fname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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