oj.uz

답안 #373367

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
373367 2021-03-04T10:12:34 Z BartolM Election Campaign (JOI15_election_campaign) C++17
100 / 100
 246 ms 32644 KB 
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;
const int LOG=17;
const int N=1e5+5;

int n, q, dtime=1;
int L[N], R[N];
int par[LOG][N], dep[N];
vector <ppi> v[N];
vector <int> ls[N];
ll dp[N], F[2*N];

ll query(int x) {
    ll ret=0;
    for (; x>0; x-=x&-x) ret+=F[x];
    return ret;
}

void update(int x, ll val) {
    for (; x<=2*n; x+=x&-x) F[x]+=val;
}

void build() {
    for (int i=1; i<LOG; ++i) {
        for (int j=1; j<=n; ++j) {
            par[i][j]=par[i-1][par[i-1][j]];
        }
    }
}

int digni(int x, int d) {
    for (int i=LOG-1; i>=0; --i) {
        if (dep[x]-(1<<i)>=d) x=par[i][x];
    }
    return x;
}

int lca(int x, int y) {
    if (dep[x]<dep[y]) swap(x, y);
    x=digni(x, dep[y]);
    if (x==y) return x;
    for (int i=LOG-1; i>=0; --i) {
        if (par[i][x]!=par[i][y]) x=par[i][x], y=par[i][y];
    }
    return par[0][x];
}

void dfs(int node, int rod) {
    dep[node]=dep[rod]+1;
    L[node]=dtime++;
    par[0][node]=rod;
    for (int sus:ls[node]) if (sus!=rod) dfs(sus, node);
    R[node]=dtime++;
}

ll rek(int node) {
    ll sum=0, ret=0;
    for (int sus:ls[node]) {
        if (sus==par[0][node]) continue;
        ret=max(ret, rek(sus));
        sum+=dp[sus];
    }
    dp[node]=sum;
    for (ppi pp:v[node]) {
        ll curr=sum+pp.Y;
        if (pp.X.X!=node) curr+=query(L[pp.X.X]);
        if (pp.X.Y!=node) curr+=query(L[pp.X.Y]);
        dp[node]=max(dp[node], curr);
    }
    ret=max(ret, dp[node]);
    update(L[node], sum-dp[node]);
    update(R[node], dp[node]-sum);
    return ret;
}


void load() {
    scanf("%d", &n);
    for (int i=0; i<n-1; ++i) {
        int a, b;
        scanf("%d %d", &a, &b);
        ls[a].pb(b); ls[b].pb(a);
    }
    dfs(1, 0);
    build();
    scanf("%d", &q);
    for (int i=0; i<q; ++i) {
        int a, b, c;
        scanf("%d %d %d", &a, &b, &c);
        int lc=lca(a, b);
        v[lc].pb(mp(mp(a, b), c));
    }
}

int main() {
    load();
    printf("%lld\n", rek(1));
    return 0;
}

Compilation message

election_campaign.cpp: In function 'void load()':
election_campaign.cpp:91:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   91 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
election_campaign.cpp:94:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   94 |         scanf("%d %d", &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~
election_campaign.cpp:99:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
election_campaign.cpp:102:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  102 |         scanf("%d %d %d", &a, &b, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 3 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5228 KB Output is correct
5 Correct 98 ms 19692 KB Output is correct
6 Correct 59 ms 28908 KB Output is correct
7 Correct 78 ms 25580 KB Output is correct
8 Correct 72 ms 20076 KB Output is correct
9 Correct 86 ms 23788 KB Output is correct
10 Correct 79 ms 19948 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 3 ms 5100 KB Output is correct
3 Correct 6 ms 5356 KB Output is correct
4 Correct 145 ms 32204 KB Output is correct
5 Correct 135 ms 32236 KB Output is correct
6 Correct 116 ms 32336 KB Output is correct
7 Correct 177 ms 32236 KB Output is correct
8 Correct 139 ms 32236 KB Output is correct
9 Correct 120 ms 32236 KB Output is correct
10 Correct 132 ms 32236 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 3 ms 5100 KB Output is correct
3 Correct 6 ms 5356 KB Output is correct
4 Correct 145 ms 32204 KB Output is correct
5 Correct 135 ms 32236 KB Output is correct
6 Correct 116 ms 32336 KB Output is correct
7 Correct 177 ms 32236 KB Output is correct
8 Correct 139 ms 32236 KB Output is correct
9 Correct 120 ms 32236 KB Output is correct
10 Correct 132 ms 32236 KB Output is correct
11 Correct 14 ms 6124 KB Output is correct
12 Correct 136 ms 32492 KB Output is correct
13 Correct 141 ms 32620 KB Output is correct
14 Correct 124 ms 32492 KB Output is correct
15 Correct 137 ms 32492 KB Output is correct
16 Correct 116 ms 32492 KB Output is correct
17 Correct 139 ms 32492 KB Output is correct
18 Correct 141 ms 32492 KB Output is correct
19 Correct 127 ms 32492 KB Output is correct
20 Correct 135 ms 32492 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 183 ms 22576 KB Output is correct
2 Correct 130 ms 32296 KB Output is correct
3 Correct 230 ms 28596 KB Output is correct
4 Correct 125 ms 22948 KB Output is correct
5 Correct 180 ms 27884 KB Output is correct
6 Correct 127 ms 22880 KB Output is correct
7 Correct 246 ms 27560 KB Output is correct
8 Correct 178 ms 22892 KB Output is correct
9 Correct 126 ms 32236 KB Output is correct
10 Correct 236 ms 26532 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 3 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5228 KB Output is correct
5 Correct 98 ms 19692 KB Output is correct
6 Correct 59 ms 28908 KB Output is correct
7 Correct 78 ms 25580 KB Output is correct
8 Correct 72 ms 20076 KB Output is correct
9 Correct 86 ms 23788 KB Output is correct
10 Correct 79 ms 19948 KB Output is correct
11 Correct 4 ms 5356 KB Output is correct
12 Correct 5 ms 5356 KB Output is correct
13 Correct 5 ms 5356 KB Output is correct
14 Correct 4 ms 5356 KB Output is correct
15 Correct 5 ms 5356 KB Output is correct
16 Correct 5 ms 5356 KB Output is correct
17 Correct 4 ms 5356 KB Output is correct
18 Correct 6 ms 5356 KB Output is correct
19 Correct 4 ms 5356 KB Output is correct
20 Correct 5 ms 5356 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 3 ms 5100 KB Output is correct
3 Correct 3 ms 5100 KB Output is correct
4 Correct 4 ms 5228 KB Output is correct
5 Correct 98 ms 19692 KB Output is correct
6 Correct 59 ms 28908 KB Output is correct
7 Correct 78 ms 25580 KB Output is correct
8 Correct 72 ms 20076 KB Output is correct
9 Correct 86 ms 23788 KB Output is correct
10 Correct 79 ms 19948 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 3 ms 5100 KB Output is correct
13 Correct 6 ms 5356 KB Output is correct
14 Correct 145 ms 32204 KB Output is correct
15 Correct 135 ms 32236 KB Output is correct
16 Correct 116 ms 32336 KB Output is correct
17 Correct 177 ms 32236 KB Output is correct
18 Correct 139 ms 32236 KB Output is correct
19 Correct 120 ms 32236 KB Output is correct
20 Correct 132 ms 32236 KB Output is correct
21 Correct 14 ms 6124 KB Output is correct
22 Correct 136 ms 32492 KB Output is correct
23 Correct 141 ms 32620 KB Output is correct
24 Correct 124 ms 32492 KB Output is correct
25 Correct 137 ms 32492 KB Output is correct
26 Correct 116 ms 32492 KB Output is correct
27 Correct 139 ms 32492 KB Output is correct
28 Correct 141 ms 32492 KB Output is correct
29 Correct 127 ms 32492 KB Output is correct
30 Correct 135 ms 32492 KB Output is correct
31 Correct 183 ms 22576 KB Output is correct
32 Correct 130 ms 32296 KB Output is correct
33 Correct 230 ms 28596 KB Output is correct
34 Correct 125 ms 22948 KB Output is correct
35 Correct 180 ms 27884 KB Output is correct
36 Correct 127 ms 22880 KB Output is correct
37 Correct 246 ms 27560 KB Output is correct
38 Correct 178 ms 22892 KB Output is correct
39 Correct 126 ms 32236 KB Output is correct
40 Correct 236 ms 26532 KB Output is correct
41 Correct 4 ms 5356 KB Output is correct
42 Correct 5 ms 5356 KB Output is correct
43 Correct 5 ms 5356 KB Output is correct
44 Correct 4 ms 5356 KB Output is correct
45 Correct 5 ms 5356 KB Output is correct
46 Correct 5 ms 5356 KB Output is correct
47 Correct 4 ms 5356 KB Output is correct
48 Correct 6 ms 5356 KB Output is correct
49 Correct 4 ms 5356 KB Output is correct
50 Correct 5 ms 5356 KB Output is correct
51 Correct 179 ms 23148 KB Output is correct
52 Correct 144 ms 32492 KB Output is correct
53 Correct 242 ms 26924 KB Output is correct
54 Correct 122 ms 23208 KB Output is correct
55 Correct 188 ms 22912 KB Output is correct
56 Correct 135 ms 32492 KB Output is correct
57 Correct 186 ms 27756 KB Output is correct
58 Correct 154 ms 23216 KB Output is correct
59 Correct 175 ms 23020 KB Output is correct
60 Correct 138 ms 32492 KB Output is correct
61 Correct 202 ms 27884 KB Output is correct
62 Correct 127 ms 22856 KB Output is correct
63 Correct 184 ms 22740 KB Output is correct
64 Correct 137 ms 32620 KB Output is correct
65 Correct 226 ms 27660 KB Output is correct
66 Correct 123 ms 23080 KB Output is correct
67 Correct 194 ms 22624 KB Output is correct
68 Correct 141 ms 32644 KB Output is correct
69 Correct 187 ms 26348 KB Output is correct
70 Correct 129 ms 23248 KB Output is correct