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답안 #399802

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
399802 2021-05-06T16:24:06 Z nguot Džumbus (COCI19_dzumbus) C++14
110 / 110
 59 ms 19088 KB 
//Vong 2 doi tuyen QG
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r){return l+rng()%(r-l+1);}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define fori(x,a,b) for(int x=a;x<=b;x++)
#define ford(x,a,b) for(int x=a;x>=b;x--)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<int,int>
#define mt make_tuple
#define all(a) a.begin(),a.end()
#define reset(f,x) memset(f,x,sizeof(f))
#define getbit(x,i) ((x>>i)&1)
#define batbit(x,i) (x|(1ll<<i))
#define tatbit(x,i) (x&~(1<<i))
#define gg exit(0);

const int maxn = 1e3 + 10;
int n,m,q,dd[maxn],a[maxn],tg[maxn][2],f[maxn][maxn][2],ans[maxn];
vector<int> ke[maxn];

int dfs(int u,int pr)
{
    dd[u] = 1;
    int szu = 1;
    fori(i,1,n) f[u][i][0] = f[u][i][1] = 1e15;
    f[u][0][0] = 0;
    f[u][0][1] = 1e15;
    forv(v,ke[u]) if(v!=pr)
    {
        int szv = dfs(v,u);
        ford(i,szu,0) for(int j=0;i+j<=n&&j<=szv;j++)
        {
            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]));

            f[u][i+j+1][1] = min(f[u][i+j+1][1],f[u][i][0] + a[u] + f[v][j][1]);
            f[u][i+j+1][1] = min(f[u][i+j+1][1],f[u][i][1] + f[v][j][0] + a[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]);
        }
        szu+=szv;
    }
    return szu;
}
main()
{
    //freopen("task.inp","r",stdin);
    fasty;
    cin>>n>>m;
    fori(i,1,n) cin>>a[i];
    fori(i,1,m)
    {
        int x,y;cin>>x>>y;
        ke[x].pb(y),ke[y].pb(x);
    }

    fori(i,1,n) ans[i] = 1e15;
    fori(v,1,n) if(!dd[v])
    {
        int szv = dfs(v,0);
        ford(j,n,0) for(int i=0;i+j<=n && i<=szv;i++)
        ans[i+j] = min(ans[i+j],ans[j] + min(f[v][i][0],f[v][i][1]));
    }
    ford(i,n-1,0) ans[i] = min(ans[i+1],ans[i]);
    int maxval = n;
    fori(i,0,n) if(ans[i]>1e9)
    {
        maxval = i-1;
        break;
    }
    int t;cin>>t;
    while(t--)
    {
        int x;cin>>x;
        int l=0,r=maxval,res=0;
        while(l<=r)
        {
            int mid = (l+r)/2;
            if(ans[mid] > x) r=mid-1;
            else res=mid,l=mid+1;
        }
        cout<<res<<"\n";
    }
}

Compilation message

dzumbus.cpp:52:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   52 | main()
      |      ^

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 16204 KB Output is correct
2 Correct 18 ms 16244 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 16204 KB Output is correct
2 Correct 18 ms 16244 KB Output is correct
3 Correct 56 ms 18424 KB Output is correct
4 Correct 59 ms 19088 KB Output is correct
5 Correct 56 ms 18632 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 3096 KB Output is correct
2 Correct 38 ms 2712 KB Output is correct
3 Correct 41 ms 3156 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 16204 KB Output is correct
2 Correct 18 ms 16244 KB Output is correct
3 Correct 56 ms 18424 KB Output is correct
4 Correct 59 ms 19088 KB Output is correct
5 Correct 56 ms 18632 KB Output is correct
6 Correct 42 ms 3096 KB Output is correct
7 Correct 38 ms 2712 KB Output is correct
8 Correct 41 ms 3156 KB Output is correct
9 Correct 48 ms 18284 KB Output is correct
10 Correct 54 ms 18904 KB Output is correct
11 Correct 53 ms 18704 KB Output is correct