oj.uz

답안 #549453

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
549453 2022-04-15T20:19:22 Z skyvn97 Election Campaign (JOI15_election_campaign) C++14
100 / 100
 297 ms 39404 KB 
#include<bits/stdc++.h>
#define MAX   100100
#define LOG   17
#define FOR(i,a,b) for (int i=(a),_b=(b);i<=_b;i=i+1)
#define FORD(i,b,a) for (int i=(b),_a=(a);i>=_a;i=i-1)
#define REP(i,n) for (int i=0,_n=(n);i<_n;i=i+1)
#define FORE(i,v) for (__typeof((v).begin()) i=(v).begin();i!=(v).end();i++)
using namespace std;
class SegmentTree {
    private:
    int n;
    vector<int> lazy;
    void update(int i,int l,int r,int u,int v,int c) {
        if (l>v || r<u || l>r || v<u) return;
        if (u<=l && r<=v) {
            lazy[i]+=c;
            return;
        }
        int m=(l+r)>>1;
        update(2*i,l,m,u,v,c);
        update(2*i+1,m+1,r,u,v,c);
    }
    public:
    SegmentTree() {
        n=0;
    }
    SegmentTree(int n) {
        this->n=n;
        lazy.assign(4*n+7,0);
    }
    void update(int l,int r,int c) {
        update(1,1,n,l,r,c);
    }
    int get(int x) const {
        int res=0;
        int i=1;
        int l=1;
        int r=n;
        while (true) {
            res+=lazy[i];
            if (l==r) return (res);
            int m=(l+r)>>1;
            if (x>m) {
                i=2*i+1;
                l=m+1;
            } else {
                i=2*i;
                r=m;
            }
        }
    }
};
struct Req {
    int u,v,c;
    Req() {
        u=v=c=0;
    }
    void input(void) {
        scanf("%d%d%d",&u,&v,&c);
    }
};
Req req[MAX];
vector<int> adj[MAX];
int n,m,cnt;
int sta[MAX],fin[MAX],high[MAX],par[MAX][LOG+1];
vector<int> reqAt[MAX];
int f[MAX],sumF[MAX];
SegmentTree myit;
void loadTree(void) {
    scanf("%d",&n);
    REP(love,n-1) {
        int u,v;
        scanf("%d%d",&u,&v);
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    scanf("%d",&m);
    FOR(i,1,m) req[i].input();
}
void dfs(int u) {
    sta[u]=++cnt;
    FORE(it,adj[u]) if (*it!=par[u][0]) {
        int v=*it;
        high[v]=high[u]+1;
        par[v][0]=u;
        dfs(v);
    }
    fin[u]=cnt;
}
int LCA(int u,int v) {
    if (high[u]<high[v]) return (LCA(v,u));
    FORD(i,LOG,0) if (high[par[u][i]]>=high[v]) u=par[u][i];
    if (u==v) return (u);
    FORD(i,LOG,0) if (par[u][i]!=par[v][i]) {
        u=par[u][i];
        v=par[v][i];
    }
    return (par[u][0]);
}
int jump(int u,int h) {
    FORD(i,LOG,0) if (high[par[u][i]]>=h) u=par[u][i];
    return (u);
}
void prepare(void) {
    high[0]=-1;
    dfs(1);
    FOR(j,1,LOG) FOR(i,1,n) par[i][j]=par[par[i][j-1]][j-1];
    FOR(i,1,m) reqAt[LCA(req[i].u,req[i].v)].push_back(i);
    myit=SegmentTree(n);
}
void dp(int u) {
    FORE(it,adj[u]) if (*it!=par[u][0]) {
        int v=*it;
        dp(v);
        sumF[u]+=f[v];
    }
    f[u]=sumF[u];
    /*printf("To calculate %d\n",u);
    FOR(i,1,n) if (LCA(i,u)==u) printf("Value of %d is %d\n",i,myit.get(sta[i]));
    printf("END\n");*/
    FORE(it,reqAt[u]) {
        int x=req[*it].u;
        int y=req[*it].v;
        int px=jump(x,high[u]+1);
        int py=jump(y,high[u]+1);
        int tmp=sumF[u];
        if (x!=u) tmp+=myit.get(sta[x])-f[px];
        if (y!=u) tmp+=myit.get(sta[y])-f[py];
        //printf("With req %d (%d,%d,%d) at %d have %d\n",*it,req[*it].u,req[*it].v,req[*it].c,u,tmp+req[*it].c);
        f[u]=max(f[u],tmp+req[*it].c);
    }
    FORE(it,adj[u]) if (*it!=par[u][0]) {
        int v=*it;
        myit.update(sta[v],fin[v],sumF[u]-f[v]);
    }
    myit.update(sta[u],sta[u],sumF[u]);
    //printf("F %d is %d\n",u,f[u]);
}
void process(void) {
    dp(1);
    printf("%d\n",f[1]);
}
int main(void) {
    //freopen("test.in","r",stdin);
    loadTree();
    prepare();
    process();
    return 0;
}

Compilation message

election_campaign.cpp: In function 'void loadTree()':
election_campaign.cpp:70:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
election_campaign.cpp:73:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   73 |         scanf("%d%d",&u,&v);
      |         ~~~~~^~~~~~~~~~~~~~
election_campaign.cpp:77:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |     scanf("%d",&m);
      |     ~~~~~^~~~~~~~~
election_campaign.cpp: In member function 'void Req::input()':
election_campaign.cpp:59:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         scanf("%d%d%d",&u,&v,&c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6100 KB Output is correct
2 Correct 5 ms 6228 KB Output is correct
3 Correct 4 ms 6100 KB Output is correct
4 Correct 4 ms 6356 KB Output is correct
5 Correct 96 ms 21156 KB Output is correct
6 Correct 74 ms 36656 KB Output is correct
7 Correct 125 ms 31224 KB Output is correct
8 Correct 86 ms 21104 KB Output is correct
9 Correct 104 ms 28100 KB Output is correct
10 Correct 91 ms 21104 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6100 KB Output is correct
2 Correct 5 ms 6228 KB Output is correct
3 Correct 4 ms 6484 KB Output is correct
4 Correct 181 ms 39040 KB Output is correct
5 Correct 173 ms 39044 KB Output is correct
6 Correct 158 ms 39024 KB Output is correct
7 Correct 189 ms 39008 KB Output is correct
8 Correct 160 ms 39052 KB Output is correct
9 Correct 159 ms 39052 KB Output is correct
10 Correct 172 ms 38992 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6100 KB Output is correct
2 Correct 5 ms 6228 KB Output is correct
3 Correct 4 ms 6484 KB Output is correct
4 Correct 181 ms 39040 KB Output is correct
5 Correct 173 ms 39044 KB Output is correct
6 Correct 158 ms 39024 KB Output is correct
7 Correct 189 ms 39008 KB Output is correct
8 Correct 160 ms 39052 KB Output is correct
9 Correct 159 ms 39052 KB Output is correct
10 Correct 172 ms 38992 KB Output is correct
11 Correct 18 ms 6900 KB Output is correct
12 Correct 173 ms 39356 KB Output is correct
13 Correct 194 ms 39368 KB Output is correct
14 Correct 155 ms 39372 KB Output is correct
15 Correct 165 ms 39360 KB Output is correct
16 Correct 186 ms 39344 KB Output is correct
17 Correct 158 ms 39304 KB Output is correct
18 Correct 169 ms 39404 KB Output is correct
19 Correct 174 ms 39348 KB Output is correct
20 Correct 170 ms 39308 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 196 ms 22996 KB Output is correct
2 Correct 168 ms 39040 KB Output is correct
3 Correct 273 ms 33084 KB Output is correct
4 Correct 172 ms 22984 KB Output is correct
5 Correct 241 ms 32168 KB Output is correct
6 Correct 166 ms 23044 KB Output is correct
7 Correct 297 ms 31816 KB Output is correct
8 Correct 194 ms 23424 KB Output is correct
9 Correct 151 ms 39100 KB Output is correct
10 Correct 268 ms 29980 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6100 KB Output is correct
2 Correct 5 ms 6228 KB Output is correct
3 Correct 4 ms 6100 KB Output is correct
4 Correct 4 ms 6356 KB Output is correct
5 Correct 96 ms 21156 KB Output is correct
6 Correct 74 ms 36656 KB Output is correct
7 Correct 125 ms 31224 KB Output is correct
8 Correct 86 ms 21104 KB Output is correct
9 Correct 104 ms 28100 KB Output is correct
10 Correct 91 ms 21104 KB Output is correct
11 Correct 5 ms 6356 KB Output is correct
12 Correct 4 ms 6484 KB Output is correct
13 Correct 4 ms 6484 KB Output is correct
14 Correct 4 ms 6336 KB Output is correct
15 Correct 5 ms 6372 KB Output is correct
16 Correct 5 ms 6340 KB Output is correct
17 Correct 7 ms 6464 KB Output is correct
18 Correct 5 ms 6464 KB Output is correct
19 Correct 4 ms 6336 KB Output is correct
20 Correct 5 ms 6484 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 6100 KB Output is correct
2 Correct 5 ms 6228 KB Output is correct
3 Correct 4 ms 6100 KB Output is correct
4 Correct 4 ms 6356 KB Output is correct
5 Correct 96 ms 21156 KB Output is correct
6 Correct 74 ms 36656 KB Output is correct
7 Correct 125 ms 31224 KB Output is correct
8 Correct 86 ms 21104 KB Output is correct
9 Correct 104 ms 28100 KB Output is correct
10 Correct 91 ms 21104 KB Output is correct
11 Correct 4 ms 6100 KB Output is correct
12 Correct 5 ms 6228 KB Output is correct
13 Correct 4 ms 6484 KB Output is correct
14 Correct 181 ms 39040 KB Output is correct
15 Correct 173 ms 39044 KB Output is correct
16 Correct 158 ms 39024 KB Output is correct
17 Correct 189 ms 39008 KB Output is correct
18 Correct 160 ms 39052 KB Output is correct
19 Correct 159 ms 39052 KB Output is correct
20 Correct 172 ms 38992 KB Output is correct
21 Correct 18 ms 6900 KB Output is correct
22 Correct 173 ms 39356 KB Output is correct
23 Correct 194 ms 39368 KB Output is correct
24 Correct 155 ms 39372 KB Output is correct
25 Correct 165 ms 39360 KB Output is correct
26 Correct 186 ms 39344 KB Output is correct
27 Correct 158 ms 39304 KB Output is correct
28 Correct 169 ms 39404 KB Output is correct
29 Correct 174 ms 39348 KB Output is correct
30 Correct 170 ms 39308 KB Output is correct
31 Correct 196 ms 22996 KB Output is correct
32 Correct 168 ms 39040 KB Output is correct
33 Correct 273 ms 33084 KB Output is correct
34 Correct 172 ms 22984 KB Output is correct
35 Correct 241 ms 32168 KB Output is correct
36 Correct 166 ms 23044 KB Output is correct
37 Correct 297 ms 31816 KB Output is correct
38 Correct 194 ms 23424 KB Output is correct
39 Correct 151 ms 39100 KB Output is correct
40 Correct 268 ms 29980 KB Output is correct
41 Correct 5 ms 6356 KB Output is correct
42 Correct 4 ms 6484 KB Output is correct
43 Correct 4 ms 6484 KB Output is correct
44 Correct 4 ms 6336 KB Output is correct
45 Correct 5 ms 6372 KB Output is correct
46 Correct 5 ms 6340 KB Output is correct
47 Correct 7 ms 6464 KB Output is correct
48 Correct 5 ms 6464 KB Output is correct
49 Correct 4 ms 6336 KB Output is correct
50 Correct 5 ms 6484 KB Output is correct
51 Correct 199 ms 23748 KB Output is correct
52 Correct 167 ms 39332 KB Output is correct
53 Correct 256 ms 30456 KB Output is correct
54 Correct 152 ms 23328 KB Output is correct
55 Correct 193 ms 23296 KB Output is correct
56 Correct 166 ms 39288 KB Output is correct
57 Correct 234 ms 31448 KB Output is correct
58 Correct 160 ms 23260 KB Output is correct
59 Correct 190 ms 23628 KB Output is correct
60 Correct 165 ms 39292 KB Output is correct
61 Correct 230 ms 31748 KB Output is correct
62 Correct 159 ms 23180 KB Output is correct
63 Correct 193 ms 23328 KB Output is correct
64 Correct 168 ms 39352 KB Output is correct
65 Correct 261 ms 31592 KB Output is correct
66 Correct 152 ms 23332 KB Output is correct
67 Correct 191 ms 23240 KB Output is correct
68 Correct 164 ms 39404 KB Output is correct
69 Correct 225 ms 29296 KB Output is correct
70 Correct 162 ms 23276 KB Output is correct