oj.uz

Submission #468580

# Submission time Handle Problem Language Result Execution time Memory
468580 2021-08-28T20:13:21 Z stefantaga Election Campaign (JOI15_election_campaign) C++14
100 / 100
 268 ms 47120 KB 
#include <bits/stdc++.h>

using namespace std;
int nr[200005],niv[200005],tatic[200005],q,q2,prim[200005],mar[200005],max_fiu[200005],cnt[200005],primul[200005],id[200005],poz[200005];
vector <int> v[200005];
int rmq[200005][20];
void dfs(int x,int tata,int nivel)
{
    nr[++q2]=x;
    niv[x]=nivel;
    mar[x]=1;
    tatic[x]=tata;
    if (prim[x]==0)
    {
        prim[x]=q2;
    }
    for (int i=0;i<v[x].size();i++)
    {
        int nod=v[x][i];
        if (tata!=nod)
        {
            dfs(nod,x,nivel+1);
            mar[x]+=mar[nod];
            if (mar[nod]>mar[max_fiu[x]])
            {
                max_fiu[x]=nod;
            }
            nr[++q2]=x;
        }
    }
}
void split (int x,int t)
{
    cnt[q]++;
    if (cnt[q]==1)
    {
        primul[q]=x;
    }
    id[x]=q;
    poz[x]=cnt[q];
    if (mar[x]==1)
    {
        return;
    }
    split(max_fiu[x],x);
    for (int i=0;i<v[x].size();i++)
    {
        int nod=v[x][i];
        if (nod!=t&&nod!=max_fiu[x])
        {
            q++;
            split(nod,x);
        }
    }
}

int lca(int x,int y)
{
    if (x==y)
    {
        return x;
    }
    x=prim[x];
    y=prim[y];
    if (x>y)
    {
        swap(x,y);
    }
    int lg=log2(y-x);
    if (niv[rmq[x][lg]]<niv[rmq[y-(1<<lg)+1][lg]])
    {
        return rmq[x][lg];
    }
    else
    {
        return rmq[y-(1<<lg)+1][lg];
    }
}
struct wow
{
    int x,y,z;
};
vector <wow> sal[200005];
int din[200005],sumafii[200005];
class SegmentTree
{
    int *arb;
public:
    inline void Initialize(int Elems)
    {
        arb = new int [((Elems<<4)+1)];
        for (int i=1;i<=(Elems<<2);i++)
        {
            arb[i]=0;
        }
        return;
    }
    inline void update(int st,int dr,int nod,int poz,int val)
    {
        if (st==dr)
        {
            arb[nod]=val;
            return;
        }
        int mij=(st+dr)/2;
        if (poz<=mij)
        {
            update(st,mij,2*nod,poz,val);
        }
        else
        {
            update(mij+1,dr,2*nod+1,poz,val);
        }
        arb[nod]=arb[2*nod+1]+arb[2*nod];
    }
    inline int query(int st,int dr,int nod,int ua,int ub)
    {
        if (ua<=st&&dr<=ub)
        {
            return arb[nod];
        }
        int mij=(st+dr)/2;
        int sum=0;
        if (ua<=mij)
        {
            sum=sum+query(st,mij,2*nod,ua,ub);
        }
        if (mij<ub)
        {
            sum=sum+query(mij+1,dr,2*nod+1,ua,ub);
        }
        return sum;
    }
}*chains;
int query(int x,int y)
{
    if (id[x]==id[y])
    {
        int st,dr;
        st=poz[x];
        dr=poz[y];
        if (st>dr)
        {
            swap(st,dr);
        }
        return chains[id[x]].query(1,cnt[id[x]],1,st,dr);
    }
    if (niv[primul[id[x]]]>niv[primul[id[y]]])
    {
        swap(x,y);
    }
    return query(y,primul[id[y]])+query(tatic[primul[id[y]]],x);
}
void solve(int x,int tata)
{
    int i;
    for (i=0;i<v[x].size();i++)
    {
        if (v[x][i]!=tata)
        {
            solve(v[x][i],x);
        }
    }
    for (i=0;i<v[x].size();i++)
    {
        if (v[x][i]!=tata)
        {
            sumafii[x]+=din[v[x][i]];
        }
    }
    din[x]=sumafii[x];
    for (i=0;i<sal[x].size();i++)
    {
        int suma=sumafii[x]+query(x,sal[x][i].x)+query(x,sal[x][i].y);
        din[x]=max(din[x],suma+sal[x][i].z);
    }
    chains[id[x]].update(1,cnt[id[x]],1,poz[x],sumafii[x]-din[x]);
}
int n,i,x,y,lg,p,j,m,z;
int main()
{
    ios_base :: sync_with_stdio(false);
    cin.tie(0);
    #ifdef HOME
    ifstream cin("date.in");
    ofstream cout("date.out");
    #endif // HOME
    cin>>n;
    for (i=1;i<n;i++)
    {
        cin>>x>>y;
        v[x].push_back(y);
        v[y].push_back(x);
    }
    dfs(1,0,1);
    q=1;
    split(1,0);
    chains = new SegmentTree[(q+1)];
    for (i=1;i<=q;i++)
    {
        chains[i].Initialize(cnt[i]);
    }
    for (i=1;i<=q2;i++)
    {
        rmq[i][0]=nr[i];
    }
    lg=log2(q2);
    p=1;
    for (i=1;i<=lg;i++)
    {
        for (j=1;j<=q2-p+1;j++)
        {
            if (niv[rmq[j][i-1]]<niv[rmq[j+p][i-1]])
            {
                rmq[j][i]=rmq[j][i-1];
            }
            else
            {
                rmq[j][i]=rmq[j+p][i-1];
            }
        }
        p=p*2;
    }
    cin>>m;
    for (i=1;i<=m;i++)
    {
        cin>>x>>y>>z;
        sal[lca(x,y)].push_back(wow{x,y,z});
    }
    solve(1,0);
    cout<<din[1];
    return 0;
}

Compilation message

election_campaign.cpp: In function 'void dfs(int, int, int)':
election_campaign.cpp:17:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i=0;i<v[x].size();i++)
      |                  ~^~~~~~~~~~~~
election_campaign.cpp: In function 'void split(int, int)':
election_campaign.cpp:46:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for (int i=0;i<v[x].size();i++)
      |                  ~^~~~~~~~~~~~
election_campaign.cpp: In function 'void solve(int, int)':
election_campaign.cpp:157:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  157 |     for (i=0;i<v[x].size();i++)
      |              ~^~~~~~~~~~~~
election_campaign.cpp:164:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  164 |     for (i=0;i<v[x].size();i++)
      |              ~^~~~~~~~~~~~
election_campaign.cpp:172:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<wow>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  172 |     for (i=0;i<sal[x].size();i++)
      |              ~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9724 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 126 ms 40852 KB Output is correct
6 Correct 90 ms 42232 KB Output is correct
7 Correct 122 ms 41896 KB Output is correct
8 Correct 98 ms 42044 KB Output is correct
9 Correct 113 ms 40332 KB Output is correct
10 Correct 102 ms 42052 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 181 ms 44212 KB Output is correct
5 Correct 188 ms 46672 KB Output is correct
6 Correct 177 ms 46660 KB Output is correct
7 Correct 187 ms 46640 KB Output is correct
8 Correct 193 ms 46696 KB Output is correct
9 Correct 177 ms 46732 KB Output is correct
10 Correct 184 ms 46652 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 10060 KB Output is correct
4 Correct 181 ms 44212 KB Output is correct
5 Correct 188 ms 46672 KB Output is correct
6 Correct 177 ms 46660 KB Output is correct
7 Correct 187 ms 46640 KB Output is correct
8 Correct 193 ms 46696 KB Output is correct
9 Correct 177 ms 46732 KB Output is correct
10 Correct 184 ms 46652 KB Output is correct
11 Correct 21 ms 10896 KB Output is correct
12 Correct 191 ms 47084 KB Output is correct
13 Correct 197 ms 47120 KB Output is correct
14 Correct 191 ms 46944 KB Output is correct
15 Correct 191 ms 46984 KB Output is correct
16 Correct 171 ms 46896 KB Output is correct
17 Correct 199 ms 46984 KB Output is correct
18 Correct 192 ms 47060 KB Output is correct
19 Correct 177 ms 47044 KB Output is correct
20 Correct 194 ms 46916 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 268 ms 42268 KB Output is correct
2 Correct 177 ms 44156 KB Output is correct
3 Correct 226 ms 46020 KB Output is correct
4 Correct 208 ms 46100 KB Output is correct
5 Correct 215 ms 45620 KB Output is correct
6 Correct 166 ms 45980 KB Output is correct
7 Correct 261 ms 45184 KB Output is correct
8 Correct 257 ms 44932 KB Output is correct
9 Correct 179 ms 46768 KB Output is correct
10 Correct 230 ms 44208 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9724 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 126 ms 40852 KB Output is correct
6 Correct 90 ms 42232 KB Output is correct
7 Correct 122 ms 41896 KB Output is correct
8 Correct 98 ms 42044 KB Output is correct
9 Correct 113 ms 40332 KB Output is correct
10 Correct 102 ms 42052 KB Output is correct
11 Correct 6 ms 10060 KB Output is correct
12 Correct 7 ms 10060 KB Output is correct
13 Correct 6 ms 10080 KB Output is correct
14 Correct 6 ms 10060 KB Output is correct
15 Correct 7 ms 10108 KB Output is correct
16 Correct 8 ms 10060 KB Output is correct
17 Correct 7 ms 10068 KB Output is correct
18 Correct 7 ms 10060 KB Output is correct
19 Correct 7 ms 10060 KB Output is correct
20 Correct 7 ms 10132 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9724 KB Output is correct
3 Correct 6 ms 9676 KB Output is correct
4 Correct 6 ms 10060 KB Output is correct
5 Correct 126 ms 40852 KB Output is correct
6 Correct 90 ms 42232 KB Output is correct
7 Correct 122 ms 41896 KB Output is correct
8 Correct 98 ms 42044 KB Output is correct
9 Correct 113 ms 40332 KB Output is correct
10 Correct 102 ms 42052 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 7 ms 10060 KB Output is correct
14 Correct 181 ms 44212 KB Output is correct
15 Correct 188 ms 46672 KB Output is correct
16 Correct 177 ms 46660 KB Output is correct
17 Correct 187 ms 46640 KB Output is correct
18 Correct 193 ms 46696 KB Output is correct
19 Correct 177 ms 46732 KB Output is correct
20 Correct 184 ms 46652 KB Output is correct
21 Correct 21 ms 10896 KB Output is correct
22 Correct 191 ms 47084 KB Output is correct
23 Correct 197 ms 47120 KB Output is correct
24 Correct 191 ms 46944 KB Output is correct
25 Correct 191 ms 46984 KB Output is correct
26 Correct 171 ms 46896 KB Output is correct
27 Correct 199 ms 46984 KB Output is correct
28 Correct 192 ms 47060 KB Output is correct
29 Correct 177 ms 47044 KB Output is correct
30 Correct 194 ms 46916 KB Output is correct
31 Correct 268 ms 42268 KB Output is correct
32 Correct 177 ms 44156 KB Output is correct
33 Correct 226 ms 46020 KB Output is correct
34 Correct 208 ms 46100 KB Output is correct
35 Correct 215 ms 45620 KB Output is correct
36 Correct 166 ms 45980 KB Output is correct
37 Correct 261 ms 45184 KB Output is correct
38 Correct 257 ms 44932 KB Output is correct
39 Correct 179 ms 46768 KB Output is correct
40 Correct 230 ms 44208 KB Output is correct
41 Correct 6 ms 10060 KB Output is correct
42 Correct 7 ms 10060 KB Output is correct
43 Correct 6 ms 10080 KB Output is correct
44 Correct 6 ms 10060 KB Output is correct
45 Correct 7 ms 10108 KB Output is correct
46 Correct 8 ms 10060 KB Output is correct
47 Correct 7 ms 10068 KB Output is correct
48 Correct 7 ms 10060 KB Output is correct
49 Correct 7 ms 10060 KB Output is correct
50 Correct 7 ms 10132 KB Output is correct
51 Correct 217 ms 45348 KB Output is correct
52 Correct 184 ms 46984 KB Output is correct
53 Correct 233 ms 44588 KB Output is correct
54 Correct 166 ms 46576 KB Output is correct
55 Correct 236 ms 45028 KB Output is correct
56 Correct 190 ms 47068 KB Output is correct
57 Correct 240 ms 45304 KB Output is correct
58 Correct 171 ms 46204 KB Output is correct
59 Correct 211 ms 45328 KB Output is correct
60 Correct 183 ms 46916 KB Output is correct
61 Correct 231 ms 45376 KB Output is correct
62 Correct 177 ms 46080 KB Output is correct
63 Correct 237 ms 44784 KB Output is correct
64 Correct 183 ms 46880 KB Output is correct
65 Correct 256 ms 45164 KB Output is correct
66 Correct 157 ms 46208 KB Output is correct
67 Correct 234 ms 44916 KB Output is correct
68 Correct 190 ms 46908 KB Output is correct
69 Correct 207 ms 44160 KB Output is correct
70 Correct 188 ms 46368 KB Output is correct