oj.uz

Submission #419668

# Submission time Handle Problem Language Result Execution time Memory
419668 2021-06-07T11:12:28 Z amunduzbaev Election Campaign (JOI15_election_campaign) C++14
100 / 100
 592 ms 54616 KB 
/* made by amunduzbaev */
 
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
 
using namespace std;
//~ using namespace __gnu_pbds;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
#define int long long
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update>;
 
const int N = 2e5+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, s, t, q, ans, res[N], a[N];
int tin[N], tout[N], par[N][20], sz[N], d[N], hh[N];
int in = 0, pos[N], fir[N];
vv<tut<3>> qq[N];
vii edges[N];

void dfs(int u, int p = -1){
	tin[u] = t++, sz[u] = 1;
	for(int i=1;i<20;i++) par[u][i] = par[par[u][i-1]][i-1];
	for(auto x : edges[u]){
		if(x == p) continue;
		par[x][0] = u, d[x] = d[u] + 1, dfs(x, u);
		sz[u] += sz[x];
		if(sz[x] > sz[hh[u]]) hh[u] = x;
	} tout[u] = t-1;
}

void dec(int u, int h){
	fir[u] = h, pos[u] = in++;
	if(hh[u]) dec(hh[u], h);
	for(auto x : edges[u]){
		if(x == par[u][0]) continue;
		if(x != hh[u]) dec(x, x);
	}
}

bool anc(int a, int b){ return (tin[a] <= tin[b] && tout[b] <= tout[a]); }
int LCA(int a, int b){
	if(anc(a, b)) return a;
	if(anc(b, a)) return b;
	for(int i=19;i>=0;i--){
		if(!anc(par[a][i], b)) a = par[a][i];
	} return par[a][0];
} 

struct tree{
	int tree[4*N];
	void sett(int i, int v, int lx = 0, int rx = n, int x = 1){
		if(lx == rx) { tree[x] = v; return; }
		int m = (lx + rx)>>1;
		if(i <= m) sett(i, v, lx, m, x<<1);
		else sett(i, v, m+1, rx, x<<1|1);
		tree[x] = tree[x<<1] + tree[x<<1|1];
	}
	
	int find(int l, int r, int lx = 0, int rx = n, int x = 1){
		if(lx > r || rx < l) return 0;
		if(lx >= l && rx <= r) return tree[x];
		int m = (lx + rx)>>1;
		return find(l, r, lx, m, x<<1) + find(l, r, m+1, rx, x<<1|1);
	}
}tt1, tt2;

int find(tree& tt, int a, int b){
	int res = 0;
	for(; fir[a] != fir[b]; b = par[fir[b]][0]){
		if(d[fir[a]] > d[fir[b]]) swap(a, b);
		res += tt.find(pos[fir[b]], pos[b]);
	} res += tt.find(min(pos[a], pos[b]), max(pos[a], pos[b]));
	return res;
}

void dfs2(int u, int p = -1){
	for(auto x : edges[u]) if(x != p) dfs2(x, u), res[u] += res[x];
	tt1.sett(pos[u], res[u]); 
	for(auto x : qq[u]){
		int sum = find(tt1, x[0], x[1]) - find(tt2, x[0], x[1]);
		//~ cout<<x[0]<<" "<<x[1]<<" "<<find(tt1, x[0], x[1])<<" "<<find(tt2, x[0], x[1])<<"\n";
		
		umax(res[u], sum + x[2]);
	} tt2.sett(pos[u], res[u]);
	//~ cout<<u<<" "<<res[u]<<"\n";
}

void solve(int t_case){
	cin>>n;
	tin[0] = 0, tout[0] = mod;
	for(int i=1;i<n;i++){
		int a, b; cin>>a>>b;
		edges[a].pb(b), edges[b].pb(a);
	}
	
	dfs(1);
	cin>>m;
	for(int i=0;i<m;i++){
		int a, b, c; cin>>a>>b>>c;
		int lca = LCA(a, b);
		qq[lca].pb({a, b, c});
	}
	
	//~ cout<<"\n";
	dec(1, 1);
	dfs2(1);
	cout<<res[1]<<"\n";
}

signed main(){
	NeedForSpeed
	if(MULTI){
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} else solve(1);
	return 0;
}

Compilation message

election_campaign.cpp: In function 'void usaco(std::string)':
election_campaign.cpp:32:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
election_campaign.cpp:33:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |  freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 9756 KB Output is correct
4 Correct 7 ms 10060 KB Output is correct
5 Correct 206 ms 40384 KB Output is correct
6 Correct 88 ms 49004 KB Output is correct
7 Correct 173 ms 46224 KB Output is correct
8 Correct 139 ms 39184 KB Output is correct
9 Correct 184 ms 44312 KB Output is correct
10 Correct 146 ms 39108 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 8 ms 10112 KB Output is correct
4 Correct 191 ms 52456 KB Output is correct
5 Correct 191 ms 54456 KB Output is correct
6 Correct 169 ms 54312 KB Output is correct
7 Correct 209 ms 54260 KB Output is correct
8 Correct 188 ms 54384 KB Output is correct
9 Correct 168 ms 54248 KB Output is correct
10 Correct 212 ms 54196 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 8 ms 10112 KB Output is correct
4 Correct 191 ms 52456 KB Output is correct
5 Correct 191 ms 54456 KB Output is correct
6 Correct 169 ms 54312 KB Output is correct
7 Correct 209 ms 54260 KB Output is correct
8 Correct 188 ms 54384 KB Output is correct
9 Correct 168 ms 54248 KB Output is correct
10 Correct 212 ms 54196 KB Output is correct
11 Correct 26 ms 11308 KB Output is correct
12 Correct 191 ms 54512 KB Output is correct
13 Correct 195 ms 54492 KB Output is correct
14 Correct 182 ms 54584 KB Output is correct
15 Correct 186 ms 54596 KB Output is correct
16 Correct 170 ms 54616 KB Output is correct
17 Correct 223 ms 54548 KB Output is correct
18 Correct 197 ms 54584 KB Output is correct
19 Correct 177 ms 54600 KB Output is correct
20 Correct 213 ms 54568 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 558 ms 43300 KB Output is correct
2 Correct 185 ms 52640 KB Output is correct
3 Correct 389 ms 49392 KB Output is correct
4 Correct 337 ms 42360 KB Output is correct
5 Correct 293 ms 48476 KB Output is correct
6 Correct 298 ms 41988 KB Output is correct
7 Correct 386 ms 48260 KB Output is correct
8 Correct 368 ms 43344 KB Output is correct
9 Correct 166 ms 52640 KB Output is correct
10 Correct 394 ms 47000 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 9756 KB Output is correct
4 Correct 7 ms 10060 KB Output is correct
5 Correct 206 ms 40384 KB Output is correct
6 Correct 88 ms 49004 KB Output is correct
7 Correct 173 ms 46224 KB Output is correct
8 Correct 139 ms 39184 KB Output is correct
9 Correct 184 ms 44312 KB Output is correct
10 Correct 146 ms 39108 KB Output is correct
11 Correct 8 ms 10060 KB Output is correct
12 Correct 7 ms 10188 KB Output is correct
13 Correct 9 ms 10188 KB Output is correct
14 Correct 8 ms 10120 KB Output is correct
15 Correct 9 ms 10120 KB Output is correct
16 Correct 8 ms 10060 KB Output is correct
17 Correct 8 ms 10108 KB Output is correct
18 Correct 8 ms 10116 KB Output is correct
19 Correct 8 ms 10076 KB Output is correct
20 Correct 8 ms 10316 KB Output is correct

Subtask #6
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9676 KB Output is correct
2 Correct 6 ms 9676 KB Output is correct
3 Correct 7 ms 9756 KB Output is correct
4 Correct 7 ms 10060 KB Output is correct
5 Correct 206 ms 40384 KB Output is correct
6 Correct 88 ms 49004 KB Output is correct
7 Correct 173 ms 46224 KB Output is correct
8 Correct 139 ms 39184 KB Output is correct
9 Correct 184 ms 44312 KB Output is correct
10 Correct 146 ms 39108 KB Output is correct
11 Correct 6 ms 9676 KB Output is correct
12 Correct 6 ms 9676 KB Output is correct
13 Correct 8 ms 10112 KB Output is correct
14 Correct 191 ms 52456 KB Output is correct
15 Correct 191 ms 54456 KB Output is correct
16 Correct 169 ms 54312 KB Output is correct
17 Correct 209 ms 54260 KB Output is correct
18 Correct 188 ms 54384 KB Output is correct
19 Correct 168 ms 54248 KB Output is correct
20 Correct 212 ms 54196 KB Output is correct
21 Correct 26 ms 11308 KB Output is correct
22 Correct 191 ms 54512 KB Output is correct
23 Correct 195 ms 54492 KB Output is correct
24 Correct 182 ms 54584 KB Output is correct
25 Correct 186 ms 54596 KB Output is correct
26 Correct 170 ms 54616 KB Output is correct
27 Correct 223 ms 54548 KB Output is correct
28 Correct 197 ms 54584 KB Output is correct
29 Correct 177 ms 54600 KB Output is correct
30 Correct 213 ms 54568 KB Output is correct
31 Correct 558 ms 43300 KB Output is correct
32 Correct 185 ms 52640 KB Output is correct
33 Correct 389 ms 49392 KB Output is correct
34 Correct 337 ms 42360 KB Output is correct
35 Correct 293 ms 48476 KB Output is correct
36 Correct 298 ms 41988 KB Output is correct
37 Correct 386 ms 48260 KB Output is correct
38 Correct 368 ms 43344 KB Output is correct
39 Correct 166 ms 52640 KB Output is correct
40 Correct 394 ms 47000 KB Output is correct
41 Correct 8 ms 10060 KB Output is correct
42 Correct 7 ms 10188 KB Output is correct
43 Correct 9 ms 10188 KB Output is correct
44 Correct 8 ms 10120 KB Output is correct
45 Correct 9 ms 10120 KB Output is correct
46 Correct 8 ms 10060 KB Output is correct
47 Correct 8 ms 10108 KB Output is correct
48 Correct 8 ms 10116 KB Output is correct
49 Correct 8 ms 10076 KB Output is correct
50 Correct 8 ms 10316 KB Output is correct
51 Correct 382 ms 43368 KB Output is correct
52 Correct 220 ms 52600 KB Output is correct
53 Correct 439 ms 47232 KB Output is correct
54 Correct 256 ms 42100 KB Output is correct
55 Correct 592 ms 43280 KB Output is correct
56 Correct 190 ms 52548 KB Output is correct
57 Correct 335 ms 48024 KB Output is correct
58 Correct 336 ms 42092 KB Output is correct
59 Correct 438 ms 43456 KB Output is correct
60 Correct 203 ms 52612 KB Output is correct
61 Correct 298 ms 48040 KB Output is correct
62 Correct 336 ms 41756 KB Output is correct
63 Correct 574 ms 43048 KB Output is correct
64 Correct 232 ms 52548 KB Output is correct
65 Correct 381 ms 47920 KB Output is correct
66 Correct 274 ms 41872 KB Output is correct
67 Correct 573 ms 43304 KB Output is correct
68 Correct 191 ms 52548 KB Output is correct
69 Correct 290 ms 46676 KB Output is correct
70 Correct 328 ms 42100 KB Output is correct