oj.uz

답안 #330272

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
330272 2020-11-24T11:37:50 Z BeanZ Election Campaign (JOI15_election_campaign) C++14
100 / 100
 340 ms 48256 KB 
// I_Love_LPL
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
const int N = 2e5 + 5;
const int lg = 18;
const int mod = 1e9 + 7;
const long long oo = 1e18;
const int lim = 1e6;
ll tin[N], tout[N], dp[N][19], f[N], dep[N];
ll timer = 0;
ll bit[N];
vector<ll> node[N];
struct viet{
    ll u, v, c;
};
vector<viet> Q[N];
void upd(ll u, ll v){
    ll res = 0;
    for (int i = u; i <= timer; i += i & -i){
        bit[i] += v;
    }
}
ll get(ll u){
    ll res = 0;
    for (int i = u; i > 0; i -= i & -i) res += bit[i];
    return res;
}
void dfs2(ll u, ll p){
    for (auto j : node[u]){
        if (j == p) continue;
        dfs2(j, u);
        upd(tin[u], f[j]);
        upd(tout[u], -f[j]);
    }
    for (auto j : Q[u]){
        f[u] = max(f[u], get(tin[j.u]) + get(tin[j.v]) - get(tin[u]) - get(tin[p]) + j.c);
    }
    f[u] = max(f[u], get(tin[u]) - get(tin[p]));
    upd(tin[u], -f[u]);
    upd(tout[u], f[u]);
}
void dfs(ll u, ll p){
    timer++;
    tin[u] = timer;
    for (int i = 1; i <= lg; i++) dp[u][i] = dp[dp[u][i - 1]][i - 1];
    for (auto j : node[u]){
        if (j == p) continue;
        dp[j][0] = u;
        dep[j] = dep[u] + 1;
        dfs(j, u);
    }
    timer++;
    tout[u] = timer;
}
ll LCA(ll u, ll v){
    if (dep[u] > dep[v]) swap(u, v);
    ll dis = dep[v] - dep[u];
    for (int i = lg; i >= 0; i--){
        if (dis & (1 << i)){
            v = dp[v][i];
        }
    }
    if (u == v) return u;
    for (int i = lg; i >= 0; i--){
        if (dp[u][i] != dp[v][i]){
            u = dp[u][i];
            v = dp[v][i];
        }
    }
    return dp[u][0];
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    if (fopen("A.inp", "r")){
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ll n;
    cin >> n;
    for (int i = 1; i < n; i++){
        ll u, v;
        cin >> u >> v;
        node[u].push_back(v);
        node[v].push_back(u);
    }
    dfs(1, 1);
    ll m;
    cin >> m;
    for (int i = 1; i <= m; i++){
        ll u, v, c;
        cin >> u >> v >> c;
        ll lca = LCA(u, v);
        Q[lca].push_back({u, v, c});
    }
    dfs2(1, 0);
    cout << f[1];
}
/*
*/

Compilation message

election_campaign.cpp: In function 'void upd(long long int, long long int)':
election_campaign.cpp:20:8: warning: unused variable 'res' [-Wunused-variable]
   20 |     ll res = 0;
      |        ^~~
election_campaign.cpp: In function 'int main()':
election_campaign.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   78 |         freopen("test.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
election_campaign.cpp:79:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   79 |         freopen("test.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 ms 9708 KB Output is correct
4 Correct 8 ms 9964 KB Output is correct
5 Correct 155 ms 34412 KB Output is correct
6 Correct 284 ms 42988 KB Output is correct
7 Correct 165 ms 40300 KB Output is correct
8 Correct 117 ms 34540 KB Output is correct
9 Correct 165 ms 38380 KB Output is correct
10 Correct 117 ms 34488 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9708 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 8 ms 10092 KB Output is correct
4 Correct 192 ms 47852 KB Output is correct
5 Correct 197 ms 47852 KB Output is correct
6 Correct 154 ms 47980 KB Output is correct
7 Correct 190 ms 47852 KB Output is correct
8 Correct 187 ms 47852 KB Output is correct
9 Correct 158 ms 47980 KB Output is correct
10 Correct 184 ms 47852 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 9708 KB Output is correct
2 Correct 7 ms 9836 KB Output is correct
3 Correct 8 ms 10092 KB Output is correct
4 Correct 192 ms 47852 KB Output is correct
5 Correct 197 ms 47852 KB Output is correct
6 Correct 154 ms 47980 KB Output is correct
7 Correct 190 ms 47852 KB Output is correct
8 Correct 187 ms 47852 KB Output is correct
9 Correct 158 ms 47980 KB Output is correct
10 Correct 184 ms 47852 KB Output is correct
11 Correct 17 ms 11368 KB Output is correct
12 Correct 191 ms 48236 KB Output is correct
13 Correct 198 ms 48108 KB Output is correct
14 Correct 183 ms 48236 KB Output is correct
15 Correct 193 ms 48108 KB Output is correct
16 Correct 167 ms 48236 KB Output is correct
17 Correct 194 ms 48108 KB Output is correct
18 Correct 194 ms 48236 KB Output is correct
19 Correct 168 ms 48256 KB Output is correct
20 Correct 205 ms 48236 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 232 ms 38780 KB Output is correct
2 Correct 177 ms 47852 KB Output is correct
3 Correct 317 ms 44584 KB Output is correct
4 Correct 181 ms 39240 KB Output is correct
5 Correct 268 ms 43944 KB Output is correct
6 Correct 172 ms 38872 KB Output is correct
7 Correct 322 ms 43692 KB Output is correct
8 Correct 251 ms 38764 KB Output is correct
9 Correct 164 ms 48108 KB Output is correct
10 Correct 323 ms 42272 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 ms 9708 KB Output is correct
4 Correct 8 ms 9964 KB Output is correct
5 Correct 155 ms 34412 KB Output is correct
6 Correct 284 ms 42988 KB Output is correct
7 Correct 165 ms 40300 KB Output is correct
8 Correct 117 ms 34540 KB Output is correct
9 Correct 165 ms 38380 KB Output is correct
10 Correct 117 ms 34488 KB Output is correct
11 Correct 9 ms 10092 KB Output is correct
12 Correct 8 ms 10092 KB Output is correct
13 Correct 8 ms 10092 KB Output is correct
14 Correct 8 ms 10092 KB Output is correct
15 Correct 8 ms 10092 KB Output is correct
16 Correct 8 ms 10092 KB Output is correct
17 Correct 8 ms 10092 KB Output is correct
18 Correct 9 ms 10092 KB Output is correct
19 Correct 8 ms 10092 KB Output is correct
20 Correct 9 ms 10104 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9708 KB Output is correct
2 Correct 7 ms 9708 KB Output is correct
3 Correct 7 ms 9708 KB Output is correct
4 Correct 8 ms 9964 KB Output is correct
5 Correct 155 ms 34412 KB Output is correct
6 Correct 284 ms 42988 KB Output is correct
7 Correct 165 ms 40300 KB Output is correct
8 Correct 117 ms 34540 KB Output is correct
9 Correct 165 ms 38380 KB Output is correct
10 Correct 117 ms 34488 KB Output is correct
11 Correct 8 ms 9708 KB Output is correct
12 Correct 7 ms 9836 KB Output is correct
13 Correct 8 ms 10092 KB Output is correct
14 Correct 192 ms 47852 KB Output is correct
15 Correct 197 ms 47852 KB Output is correct
16 Correct 154 ms 47980 KB Output is correct
17 Correct 190 ms 47852 KB Output is correct
18 Correct 187 ms 47852 KB Output is correct
19 Correct 158 ms 47980 KB Output is correct
20 Correct 184 ms 47852 KB Output is correct
21 Correct 17 ms 11368 KB Output is correct
22 Correct 191 ms 48236 KB Output is correct
23 Correct 198 ms 48108 KB Output is correct
24 Correct 183 ms 48236 KB Output is correct
25 Correct 193 ms 48108 KB Output is correct
26 Correct 167 ms 48236 KB Output is correct
27 Correct 194 ms 48108 KB Output is correct
28 Correct 194 ms 48236 KB Output is correct
29 Correct 168 ms 48256 KB Output is correct
30 Correct 205 ms 48236 KB Output is correct
31 Correct 232 ms 38780 KB Output is correct
32 Correct 177 ms 47852 KB Output is correct
33 Correct 317 ms 44584 KB Output is correct
34 Correct 181 ms 39240 KB Output is correct
35 Correct 268 ms 43944 KB Output is correct
36 Correct 172 ms 38872 KB Output is correct
37 Correct 322 ms 43692 KB Output is correct
38 Correct 251 ms 38764 KB Output is correct
39 Correct 164 ms 48108 KB Output is correct
40 Correct 323 ms 42272 KB Output is correct
41 Correct 9 ms 10092 KB Output is correct
42 Correct 8 ms 10092 KB Output is correct
43 Correct 8 ms 10092 KB Output is correct
44 Correct 8 ms 10092 KB Output is correct
45 Correct 8 ms 10092 KB Output is correct
46 Correct 8 ms 10092 KB Output is correct
47 Correct 8 ms 10092 KB Output is correct
48 Correct 9 ms 10092 KB Output is correct
49 Correct 8 ms 10092 KB Output is correct
50 Correct 9 ms 10104 KB Output is correct
51 Correct 242 ms 38996 KB Output is correct
52 Correct 187 ms 48108 KB Output is correct
53 Correct 340 ms 42688 KB Output is correct
54 Correct 168 ms 39136 KB Output is correct
55 Correct 226 ms 38816 KB Output is correct
56 Correct 201 ms 48108 KB Output is correct
57 Correct 268 ms 43560 KB Output is correct
58 Correct 177 ms 39080 KB Output is correct
59 Correct 234 ms 39012 KB Output is correct
60 Correct 198 ms 48108 KB Output is correct
61 Correct 281 ms 43608 KB Output is correct
62 Correct 173 ms 38880 KB Output is correct
63 Correct 235 ms 38800 KB Output is correct
64 Correct 188 ms 48236 KB Output is correct
65 Correct 339 ms 43492 KB Output is correct
66 Correct 179 ms 39068 KB Output is correct
67 Correct 227 ms 38872 KB Output is correct
68 Correct 198 ms 48220 KB Output is correct
69 Correct 272 ms 42152 KB Output is correct
70 Correct 186 ms 39060 KB Output is correct