oj.uz

Submission #85824

# Submission time Handle Problem Language Result Execution time Memory
85824 2018-11-21T17:14:25 Z rzbt Election Campaign (JOI15_election_campaign) C++14
100 / 100
 275 ms 152484 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define MAXN 100005
typedef long long ll;


using namespace std;

int n,m,vreme;
vector<int> niz[MAXN];
vector<pair<int,int> > ono;
pair<int,int> seg[8*MAXN];
int ulaz[MAXN],izlaz[MAXN];
ll dp[MAXN][2];

struct put{
    int a,b,c;

};
vector<put> svi[MAXN];
put make_put(int a,int b,int c){
    put p;
    p.a=a;
    p.b=b;
    p.c=c;
    return p;
}


void dfs1(int t,int o,int h){
    vreme++;
    ulaz[t]=vreme;
    ono.pb(mp(h,t));
    for(auto x:niz[t]){
        if(x==o)continue;
        dfs1(x,t,h+1);
        ono.pb(mp(h,t));
        vreme++;
    }
}
void izgradi(int l,int d,int k){

    if(l==d){
        seg[k]=ono[l];
        return;
    }
    int mid=(l+d)/2;
    izgradi(l,mid,k+k);
    izgradi(mid+1,d,k+k+1);
    seg[k]=min(seg[k+k],seg[k+k+1]);
}

pair<int,int> dobij(int l,int d,int tl,int td,int k){

    if(l>td || d<tl)return ono[0];
    if(l>=tl && d<=td)return seg[k];
    int mid=(l+d)/2;
    return min(dobij(l,mid,tl,td,k+k),dobij(mid+1,d,tl,td,k+k+1));
}


ll bit[MAXN];
void dod(int p, ll x){

    for(;p<MAXN;p+=(-p)&p)
        bit[p]+=x;
}
ll dob(ll p){

    ll z=0;
    for(;p>0;p-=(-p)&p)
        z+=bit[p];
    return z;
}


void dfs(int t,int o){
    vreme++;
    ulaz[t]=vreme;
    for(auto x:niz[t]){
        if(x==o)continue;
        dfs(x,t);
        dp[t][0]+=dp[x][1];
    }
    for(auto x:niz[t]){
        if(x==o)continue;
        dod(ulaz[x],dp[t][0]-dp[x][1]);
        dod(izlaz[x]+1,-dp[t][0]+dp[x][1]);
    }
    dp[t][1]=dp[t][0];
    for(auto x:svi[t]){
        dp[t][1]=max(dp[t][1],dob(ulaz[x.a])+dob(ulaz[x.b])+dp[x.a][0]+dp[x.b][0]+x.c-dp[t][0]);
        //printf("          %d   %lld %lld     %d  %d\n",t,dob(ulaz[x.a]),dob(ulaz[x.b]),x.a,x.b);

    }
    //printf("   %d   %lld %lld\n",t,dp[t][0],dp[t][1]);

    izlaz[t]=vreme;
}


int main()
{
    scanf("%d", &n);
    for(int i=1;i<n;i++){
        int a,b;
        scanf("%d %d", &a, &b);
        niz[a].pb(b);
        niz[b].pb(a);
    }
    ono.pb(mp(MAXN,0));
    dfs1(1,0,0);
    izgradi(1,n+n-1,1);
    scanf("%d", &m);
    for(int i=1;i<=m;i++){
        int a,b,c;
        scanf("%d %d %d", &a, &b, &c);
        if(ulaz[a]>ulaz[b])swap(a,b);

        //printf("%d\n",dobij(1,n+n-1,ulaz[a],ulaz[b],1).second);
        svi[dobij(1,n+n-1,ulaz[a],ulaz[b],1).second].pb(make_put(a,b,c));
    }
    vreme=0;
    memset(ulaz,0,sizeof(ulaz));

    dfs(1,0);
    printf("%lld",dp[1][1]);

    return 0;
}

Compilation message

election_campaign.cpp: In function 'int main()':
election_campaign.cpp:108:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
election_campaign.cpp:111:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
election_campaign.cpp:118:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
election_campaign.cpp:121:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &a, &b, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5624 KB Output is correct
2 Correct 8 ms 5624 KB Output is correct
3 Correct 7 ms 5644 KB Output is correct
4 Correct 7 ms 5796 KB Output is correct
5 Correct 125 ms 18712 KB Output is correct
6 Correct 86 ms 28972 KB Output is correct
7 Correct 116 ms 28972 KB Output is correct
8 Correct 94 ms 28972 KB Output is correct
9 Correct 112 ms 28972 KB Output is correct
10 Correct 94 ms 28972 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 28972 KB Output is correct
2 Correct 6 ms 28972 KB Output is correct
3 Correct 7 ms 28972 KB Output is correct
4 Correct 182 ms 38380 KB Output is correct
5 Correct 197 ms 40816 KB Output is correct
6 Correct 182 ms 43192 KB Output is correct
7 Correct 188 ms 45760 KB Output is correct
8 Correct 182 ms 48252 KB Output is correct
9 Correct 190 ms 50552 KB Output is correct
10 Correct 170 ms 53064 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 28972 KB Output is correct
2 Correct 6 ms 28972 KB Output is correct
3 Correct 7 ms 28972 KB Output is correct
4 Correct 182 ms 38380 KB Output is correct
5 Correct 197 ms 40816 KB Output is correct
6 Correct 182 ms 43192 KB Output is correct
7 Correct 188 ms 45760 KB Output is correct
8 Correct 182 ms 48252 KB Output is correct
9 Correct 190 ms 50552 KB Output is correct
10 Correct 170 ms 53064 KB Output is correct
11 Correct 23 ms 53064 KB Output is correct
12 Correct 183 ms 56092 KB Output is correct
13 Correct 174 ms 58868 KB Output is correct
14 Correct 174 ms 61696 KB Output is correct
15 Correct 174 ms 64296 KB Output is correct
16 Correct 168 ms 67180 KB Output is correct
17 Correct 175 ms 69780 KB Output is correct
18 Correct 186 ms 72568 KB Output is correct
19 Correct 206 ms 75344 KB Output is correct
20 Correct 180 ms 77992 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 244 ms 77992 KB Output is correct
2 Correct 186 ms 82936 KB Output is correct
3 Correct 256 ms 82936 KB Output is correct
4 Correct 202 ms 82936 KB Output is correct
5 Correct 264 ms 86056 KB Output is correct
6 Correct 202 ms 86056 KB Output is correct
7 Correct 233 ms 90688 KB Output is correct
8 Correct 253 ms 90688 KB Output is correct
9 Correct 206 ms 100240 KB Output is correct
10 Correct 265 ms 100240 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5624 KB Output is correct
2 Correct 8 ms 5624 KB Output is correct
3 Correct 7 ms 5644 KB Output is correct
4 Correct 7 ms 5796 KB Output is correct
5 Correct 125 ms 18712 KB Output is correct
6 Correct 86 ms 28972 KB Output is correct
7 Correct 116 ms 28972 KB Output is correct
8 Correct 94 ms 28972 KB Output is correct
9 Correct 112 ms 28972 KB Output is correct
10 Correct 94 ms 28972 KB Output is correct
11 Correct 10 ms 100240 KB Output is correct
12 Correct 8 ms 100240 KB Output is correct
13 Correct 8 ms 100240 KB Output is correct
14 Correct 10 ms 100240 KB Output is correct
15 Correct 8 ms 100240 KB Output is correct
16 Correct 9 ms 100240 KB Output is correct
17 Correct 8 ms 100240 KB Output is correct
18 Correct 9 ms 100240 KB Output is correct
19 Correct 10 ms 100240 KB Output is correct
20 Correct 8 ms 100240 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5624 KB Output is correct
2 Correct 8 ms 5624 KB Output is correct
3 Correct 7 ms 5644 KB Output is correct
4 Correct 7 ms 5796 KB Output is correct
5 Correct 125 ms 18712 KB Output is correct
6 Correct 86 ms 28972 KB Output is correct
7 Correct 116 ms 28972 KB Output is correct
8 Correct 94 ms 28972 KB Output is correct
9 Correct 112 ms 28972 KB Output is correct
10 Correct 94 ms 28972 KB Output is correct
11 Correct 7 ms 28972 KB Output is correct
12 Correct 6 ms 28972 KB Output is correct
13 Correct 7 ms 28972 KB Output is correct
14 Correct 182 ms 38380 KB Output is correct
15 Correct 197 ms 40816 KB Output is correct
16 Correct 182 ms 43192 KB Output is correct
17 Correct 188 ms 45760 KB Output is correct
18 Correct 182 ms 48252 KB Output is correct
19 Correct 190 ms 50552 KB Output is correct
20 Correct 170 ms 53064 KB Output is correct
21 Correct 23 ms 53064 KB Output is correct
22 Correct 183 ms 56092 KB Output is correct
23 Correct 174 ms 58868 KB Output is correct
24 Correct 174 ms 61696 KB Output is correct
25 Correct 174 ms 64296 KB Output is correct
26 Correct 168 ms 67180 KB Output is correct
27 Correct 175 ms 69780 KB Output is correct
28 Correct 186 ms 72568 KB Output is correct
29 Correct 206 ms 75344 KB Output is correct
30 Correct 180 ms 77992 KB Output is correct
31 Correct 244 ms 77992 KB Output is correct
32 Correct 186 ms 82936 KB Output is correct
33 Correct 256 ms 82936 KB Output is correct
34 Correct 202 ms 82936 KB Output is correct
35 Correct 264 ms 86056 KB Output is correct
36 Correct 202 ms 86056 KB Output is correct
37 Correct 233 ms 90688 KB Output is correct
38 Correct 253 ms 90688 KB Output is correct
39 Correct 206 ms 100240 KB Output is correct
40 Correct 265 ms 100240 KB Output is correct
41 Correct 10 ms 100240 KB Output is correct
42 Correct 8 ms 100240 KB Output is correct
43 Correct 8 ms 100240 KB Output is correct
44 Correct 10 ms 100240 KB Output is correct
45 Correct 8 ms 100240 KB Output is correct
46 Correct 9 ms 100240 KB Output is correct
47 Correct 8 ms 100240 KB Output is correct
48 Correct 9 ms 100240 KB Output is correct
49 Correct 10 ms 100240 KB Output is correct
50 Correct 8 ms 100240 KB Output is correct
51 Correct 256 ms 100240 KB Output is correct
52 Correct 187 ms 108508 KB Output is correct
53 Correct 253 ms 108508 KB Output is correct
54 Correct 203 ms 108508 KB Output is correct
55 Correct 249 ms 108508 KB Output is correct
56 Correct 199 ms 119408 KB Output is correct
57 Correct 238 ms 119408 KB Output is correct
58 Correct 203 ms 119408 KB Output is correct
59 Correct 249 ms 119408 KB Output is correct
60 Correct 259 ms 130428 KB Output is correct
61 Correct 244 ms 130428 KB Output is correct
62 Correct 210 ms 130428 KB Output is correct
63 Correct 238 ms 130428 KB Output is correct
64 Correct 178 ms 141492 KB Output is correct
65 Correct 248 ms 141492 KB Output is correct
66 Correct 197 ms 141492 KB Output is correct
67 Correct 244 ms 141492 KB Output is correct
68 Correct 180 ms 152484 KB Output is correct
69 Correct 241 ms 152484 KB Output is correct
70 Correct 275 ms 152484 KB Output is correct