oj.uz

답안 #153832

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
153832 2019-09-16T16:51:54 Z karma Election Campaign (JOI15_election_campaign) C++14
100 / 100
 364 ms 34936 KB 
#include<bits/stdc++.h>
#define pb      emplace_back

using namespace std;

const int N = int(2e5) + 7;
const int logN = 17;

int n, m, u, v, cur, res, fr[N], to[N], c[N], f[N], g[N];
int h[N], p[N][logN], Time = 0, in[N], out[N], t[N];
vector<int> q[N], a[N];

void BuildTree(int u, int par) {
     p[u][0] = par; in[u] = ++Time;
     for(int i = 1; i < logN; ++i) p[u][i] = p[p[u][i - 1]][i - 1];
     for(int v: a[u]) {
        if(v == par) continue;
        h[v] = h[u] + 1;
        BuildTree(v, u);
     }
     out[u] = Time;
}

int LCA(int u, int v) {
    if(h[u] < h[v]) swap(u, v);
    for(int i = logN - 1; i >= 0; --i)
        if(h[u] - (1 << i) >= h[v]) u = p[u][i];
    if(u == v) return u;
    for(int i = logN - 1; i >= 0; --i)
       if(p[u][i] != p[v][i]) u = p[u][i], v = p[v][i];
    return p[u][0];
}

void Update(int x, int val) {for(; x <= n; x += (x & -x)) t[x] += val;}
int Query(int x) {int res = 0; for(; x > 0; x -= (x & -x)) res += t[x]; return res;}

void GetAns(int u) {
     for(int v: a[u]) {
        if(v == p[u][0]) continue;
        GetAns(v); g[u] += f[v];
     }
     for(int v: a[u]) {
        if(v == p[u][0]) continue;
        Update(in[v], g[u] - f[v]);
        Update(out[v] + 1, f[v] - g[u]);
     }
     f[u] = g[u];
     for(int i: q[u]) {
        cur = g[fr[i]] + g[to[i]] - g[u] + Query(in[fr[i]]) + Query(in[to[i]]) + c[i];
        f[u] = max(f[u], cur);
     }
     res = max(res, f[u]);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    if(fopen("test.inp", "r")) {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    cin >> n;
    for(int i = 1; i < n; ++i) {
        cin >> u >> v;
        a[u].pb(v), a[v].pb(u);
    }
    BuildTree(1, 1);
    cin >> m;
    for(int i = 0; i < m; ++i) {
        cin >> fr[i] >> to[i] >> c[i];
        q[LCA(fr[i], to[i])].pb(i);
    }
    res = 0;
    GetAns(1);
    cout << res;
}

Compilation message

election_campaign.cpp: In function 'int main()':
election_campaign.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("test.inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
election_campaign.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("test.out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9720 KB Output is correct
2 Correct 10 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 11 ms 9848 KB Output is correct
5 Correct 123 ms 23164 KB Output is correct
6 Correct 74 ms 30840 KB Output is correct
7 Correct 130 ms 28128 KB Output is correct
8 Correct 96 ms 23164 KB Output is correct
9 Correct 126 ms 26716 KB Output is correct
10 Correct 99 ms 23292 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9852 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 12 ms 9980 KB Output is correct
4 Correct 168 ms 34436 KB Output is correct
5 Correct 171 ms 34424 KB Output is correct
6 Correct 149 ms 34480 KB Output is correct
7 Correct 167 ms 34424 KB Output is correct
8 Correct 186 ms 34656 KB Output is correct
9 Correct 153 ms 34552 KB Output is correct
10 Correct 284 ms 34404 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9852 KB Output is correct
2 Correct 11 ms 9848 KB Output is correct
3 Correct 12 ms 9980 KB Output is correct
4 Correct 168 ms 34436 KB Output is correct
5 Correct 171 ms 34424 KB Output is correct
6 Correct 149 ms 34480 KB Output is correct
7 Correct 167 ms 34424 KB Output is correct
8 Correct 186 ms 34656 KB Output is correct
9 Correct 153 ms 34552 KB Output is correct
10 Correct 284 ms 34404 KB Output is correct
11 Correct 23 ms 10744 KB Output is correct
12 Correct 169 ms 34740 KB Output is correct
13 Correct 212 ms 34772 KB Output is correct
14 Correct 176 ms 34936 KB Output is correct
15 Correct 219 ms 34936 KB Output is correct
16 Correct 162 ms 34808 KB Output is correct
17 Correct 183 ms 34744 KB Output is correct
18 Correct 175 ms 34768 KB Output is correct
19 Correct 160 ms 34884 KB Output is correct
20 Correct 173 ms 34784 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 207 ms 25988 KB Output is correct
2 Correct 157 ms 34552 KB Output is correct
3 Correct 297 ms 31476 KB Output is correct
4 Correct 158 ms 26228 KB Output is correct
5 Correct 240 ms 31068 KB Output is correct
6 Correct 151 ms 26488 KB Output is correct
7 Correct 263 ms 30784 KB Output is correct
8 Correct 211 ms 26744 KB Output is correct
9 Correct 160 ms 34476 KB Output is correct
10 Correct 265 ms 29852 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9720 KB Output is correct
2 Correct 10 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 11 ms 9848 KB Output is correct
5 Correct 123 ms 23164 KB Output is correct
6 Correct 74 ms 30840 KB Output is correct
7 Correct 130 ms 28128 KB Output is correct
8 Correct 96 ms 23164 KB Output is correct
9 Correct 126 ms 26716 KB Output is correct
10 Correct 99 ms 23292 KB Output is correct
11 Correct 12 ms 9976 KB Output is correct
12 Correct 12 ms 10104 KB Output is correct
13 Correct 12 ms 9976 KB Output is correct
14 Correct 12 ms 9976 KB Output is correct
15 Correct 12 ms 9976 KB Output is correct
16 Correct 12 ms 9976 KB Output is correct
17 Correct 12 ms 9976 KB Output is correct
18 Correct 12 ms 9976 KB Output is correct
19 Correct 12 ms 9976 KB Output is correct
20 Correct 12 ms 9976 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 9720 KB Output is correct
2 Correct 10 ms 9720 KB Output is correct
3 Correct 11 ms 9848 KB Output is correct
4 Correct 11 ms 9848 KB Output is correct
5 Correct 123 ms 23164 KB Output is correct
6 Correct 74 ms 30840 KB Output is correct
7 Correct 130 ms 28128 KB Output is correct
8 Correct 96 ms 23164 KB Output is correct
9 Correct 126 ms 26716 KB Output is correct
10 Correct 99 ms 23292 KB Output is correct
11 Correct 11 ms 9852 KB Output is correct
12 Correct 11 ms 9848 KB Output is correct
13 Correct 12 ms 9980 KB Output is correct
14 Correct 168 ms 34436 KB Output is correct
15 Correct 171 ms 34424 KB Output is correct
16 Correct 149 ms 34480 KB Output is correct
17 Correct 167 ms 34424 KB Output is correct
18 Correct 186 ms 34656 KB Output is correct
19 Correct 153 ms 34552 KB Output is correct
20 Correct 284 ms 34404 KB Output is correct
21 Correct 23 ms 10744 KB Output is correct
22 Correct 169 ms 34740 KB Output is correct
23 Correct 212 ms 34772 KB Output is correct
24 Correct 176 ms 34936 KB Output is correct
25 Correct 219 ms 34936 KB Output is correct
26 Correct 162 ms 34808 KB Output is correct
27 Correct 183 ms 34744 KB Output is correct
28 Correct 175 ms 34768 KB Output is correct
29 Correct 160 ms 34884 KB Output is correct
30 Correct 173 ms 34784 KB Output is correct
31 Correct 207 ms 25988 KB Output is correct
32 Correct 157 ms 34552 KB Output is correct
33 Correct 297 ms 31476 KB Output is correct
34 Correct 158 ms 26228 KB Output is correct
35 Correct 240 ms 31068 KB Output is correct
36 Correct 151 ms 26488 KB Output is correct
37 Correct 263 ms 30784 KB Output is correct
38 Correct 211 ms 26744 KB Output is correct
39 Correct 160 ms 34476 KB Output is correct
40 Correct 265 ms 29852 KB Output is correct
41 Correct 12 ms 9976 KB Output is correct
42 Correct 12 ms 10104 KB Output is correct
43 Correct 12 ms 9976 KB Output is correct
44 Correct 12 ms 9976 KB Output is correct
45 Correct 12 ms 9976 KB Output is correct
46 Correct 12 ms 9976 KB Output is correct
47 Correct 12 ms 9976 KB Output is correct
48 Correct 12 ms 9976 KB Output is correct
49 Correct 12 ms 9976 KB Output is correct
50 Correct 12 ms 9976 KB Output is correct
51 Correct 217 ms 27000 KB Output is correct
52 Correct 229 ms 34792 KB Output is correct
53 Correct 364 ms 30400 KB Output is correct
54 Correct 188 ms 26640 KB Output is correct
55 Correct 191 ms 26484 KB Output is correct
56 Correct 182 ms 34684 KB Output is correct
57 Correct 244 ms 30840 KB Output is correct
58 Correct 154 ms 26488 KB Output is correct
59 Correct 214 ms 26872 KB Output is correct
60 Correct 175 ms 34708 KB Output is correct
61 Correct 272 ms 31020 KB Output is correct
62 Correct 151 ms 26416 KB Output is correct
63 Correct 192 ms 26496 KB Output is correct
64 Correct 170 ms 34808 KB Output is correct
65 Correct 306 ms 30700 KB Output is correct
66 Correct 154 ms 26744 KB Output is correct
67 Correct 201 ms 26716 KB Output is correct
68 Correct 173 ms 34780 KB Output is correct
69 Correct 277 ms 29820 KB Output is correct
70 Correct 170 ms 26856 KB Output is correct