oj.uz

Submission #253699

# Submission time Handle Problem Language Result Execution time Memory
253699 2020-07-28T14:27:46 Z egekabas Džumbus (COCI19_dzumbus) C++14
110 / 110
 557 ms 19192 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
const ll inf = 1e18+7;
int n, m;
int val[1009];
ll dp[1009][1009][2];
int vis[1009];
int sz[1009];
vector<int> g[1009];
void dfs(int v, int prt){
    sz[v] = 1;
    vis[v] = 1;
    for(int i = 1; i <= n; ++i)
        dp[v][i][0] = dp[v][i][1] = inf;
    dp[v][0][1] = inf;
    for(auto u : g[v])
        if(u != prt){
            dfs(u, v);
            sz[v] += sz[u];
        }
    for(int j = sz[prt]; j >= 0; --j)
        for(int i = 0; i+j<=n && i <= sz[v]; ++i){
            dp[prt][j+i][0] = min(dp[prt][j+i][0], dp[prt][j][0]+min(dp[v][i][0], dp[v][i][1]));
            dp[prt][j+i][1] = min(dp[prt][j+i][1], dp[prt][j][1]+min(dp[v][i][0], dp[v][i][1]));
            dp[prt][j+i+2][1] = min(dp[prt][j+i+2][1], dp[prt][j][0]+dp[v][i][0] + val[v] + val[prt]);
            dp[prt][j+i+1][1] = min(dp[prt][j+i+1][1], dp[prt][j][0]+dp[v][i][1] + val[prt]);
            dp[prt][i+j+1][1] = min(dp[prt][i+j+1][1], dp[prt][j][1]+dp[v][i][0]+val[v]);
        }
}
ll ans[1009];
int main(){
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    scanf("%d%d", &n, &m);
    for(int i = 1; i <= n; ++i)
        scanf("%d", &val[i]);
    for(int i = 0; i < m; ++i){
        int x, y;
        scanf("%d%d", &x, &y);
        g[x].pb(y);
        g[y].pb(x);
    }

    for(int i = 1; i <= n; ++i) ans[i] = inf;
    for(int v = 1; v <= n; ++v){
        if(vis[v]) continue;
        dfs(v, 0);
        for(int j = n; j >= 0; --j)
            for(int i = 0; i+j <= n && i <= sz[v]; ++i)
                ans[i+j] = min(ans[i+j], ans[j]+min(dp[v][i][0], dp[v][i][1]));
    }
    for(int i = n-1; i >= 0; --i){
        ans[i] = min(ans[i], ans[i+1]);
    }
    int maxval = n;
    for(int i = 0; i <= n; ++i)
        if(ans[i] > 1e9){
            maxval = i-1;
            break;
        }
    int q;
    cin >> q;
    while(q--){
        int x;
        cin >> x;
        int l = 0, r = maxval;
        while(l < r){
            int mid = (l+r+1)/2;
            if(ans[mid] > x)
                r = mid-1;
            else
                l = mid;
        }
        printf("%d\n", l);
    }
}

Compilation message

dzumbus.cpp: In function 'int main()':
dzumbus.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
dzumbus.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &val[i]);
         ~~~~~^~~~~~~~~~~~~~~
dzumbus.cpp:52:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 16256 KB Output is correct
2 Correct 16 ms 16256 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 16256 KB Output is correct
2 Correct 16 ms 16256 KB Output is correct
3 Correct 508 ms 17140 KB Output is correct
4 Correct 536 ms 19192 KB Output is correct
5 Correct 536 ms 18680 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 491 ms 1836 KB Output is correct
2 Correct 492 ms 1656 KB Output is correct
3 Correct 529 ms 1272 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 16256 KB Output is correct
2 Correct 16 ms 16256 KB Output is correct
3 Correct 508 ms 17140 KB Output is correct
4 Correct 536 ms 19192 KB Output is correct
5 Correct 536 ms 18680 KB Output is correct
6 Correct 491 ms 1836 KB Output is correct
7 Correct 492 ms 1656 KB Output is correct
8 Correct 529 ms 1272 KB Output is correct
9 Correct 509 ms 18424 KB Output is correct
10 Correct 550 ms 19020 KB Output is correct
11 Correct 557 ms 18692 KB Output is correct