Submission #1173865

#	Time	Username	Problem	Language	Result	Execution time	Memory
1173865		thelegendary08	Two Currencies (JOI23_currencies)	C++17	28 / 100	162 ms	37288 KiB

currencies

#include<bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define int long long
#define vi vector<int>
#define vvi vector<vector<int>>
#define pii pair<int, int>
#define vpii vector<pair<int, int>>
#define vc vector<char>
#define vb vector<bool>
#define mii map<int,int>
#define f0r(i,n) for(int i=0;i<n;i++)
#define FOR(i,k,n) for(int i=k;i<n;i++)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define in(a) int a; cin>>a
#define in2(a,b) int a,b; cin>>a>>b
#define in3(a,b,c) int a,b,c; cin>>a>>b>>c
#define in4(a,b,c,d) int a,b,c,d; cin>>a>>b>>c>>d
#define vin(v,n); vi v(n); f0r(i,n){cin>>v[i];}
#define out(a) cout<<a<<'\n'
#define out2(a,b) cout<<a<<' '<<b<<'\n'
#define out3(a,b,c) cout<<a<<' '<<b<<' '<<c<<'\n'
#define out4(a,b,c,d) cout<<a<<' '<<b<<' '<<c<<' '<<d<<'\n'
#define vout(v) for(auto u : v){cout<<u<<' ';} cout<<'\n'
#define dout(a) cout<<a<<' '<<#a<<'\n'
#define dout2(a,b) cout<<a<<' '<<#a<<' '<<b<<' '<<#b<<'\n'
#define yn(x); if(x){cout<<"YES"<<'\n';}else{cout<<"NO"<<'\n';}
const int leg = 1e9 + 7;
const int mod = 998244353;
using namespace std;
const int mxn = 1e5 + 5;
vi adj[mxn];
vi dep(mxn), par(mxn);
void dfs(int node, int from){
	par[node] = from;
	for(auto u : adj[node]){
		if(u != from){
			dep[u] = dep[node] + 1;
			dfs(u, node);
		}
	}
}
vi s(mxn);
vi cnt(mxn);
void dfs2(int node, int from){
	for(auto u : adj[node]){
		if(u != from){
			s[u] = s[node] + cnt[u];
			dfs2(u, node);
		}
	}
}
vvi jmp(mxn, vi(17));
int lca(int a, int b){
	if(dep[a] < dep[b])swap(a,b);
	int diff = dep[a] - dep[b];
	f0r(i, 17){
		if(diff & (1<<i)){
			a = jmp[a][i];
		}
	}
	if(a == b)return a;
	for(int i = 16; i>=0; i--){
		if(jmp[a][i] != jmp[b][i]){
			a = jmp[a][i];
			b = jmp[b][i];
		}
	}
	return par[a];
}
signed main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	//ifstream cin(".in");
	//ofstream cout(".out");
	in3(n,m,q);
	vpii edges;
	f0r(i,n-1){
		in2(a,b);
		a--; b--;
		adj[a].pb(b);
		adj[b].pb(a);
		edges.pb(mp(a,b));
	}
	dfs(0,-1);
	vi edgetonode(n-1);
	f0r(i,n-1){
		edgetonode[i] = (dep[edges[i].first] > dep[edges[i].second] ? edges[i].first : edges[i].second);
	}
	f0r(i,n){
		jmp[i][0] = par[i];
	}
	FOR(i,1,17){
		f0r(j,n){
			if(jmp[j][i-1] == -1)jmp[j][i] = -1;
			else jmp[j][i] = jmp[jmp[j][i-1]][i-1];
		}
	}
	// vout(dep);
	vector<vi>v(n);
	int cost;
	f0r(i,m){
		in2(p,c);
		cost = c;
		p--;
		v[edgetonode[p]].pb(c);
		cnt[edgetonode[p]]++;
	}
	dfs2(0,-1);
	// out(lca(2,8));
	// f0r(i,n)cout<<cnt[i]<<' ';
	// cout<<'\n';
	while(q--){
		in4(S,T,X,Y);
		S--; T--;
		int c = Y / cost;
		int l = lca(S,T);
		int curcnt = s[S] + s[T] - 2 * s[l];
		// dout(curcnt);
		int g = curcnt - c;
		if(g < 0)out(X);
		else if(X >= g)out(X - g);
		else out(-1);
	}
	
}

• Subtask 1: 0 / 10
• Subtask 2: 28 / 28
• Subtask 3: 0 / 30
• Subtask 4: 0 / 32