oj.uz

Submission #888792

# Submission time Handle Problem Language Result Execution time Memory
888792 2023-12-18T07:54:05 Z vjudge1 Two Currencies (JOI23_currencies) C++17
10 / 100
 5000 ms 60984 KB 
#include <bits/stdc++.h>
 
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
 
using namespace std;	
 
void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
int pow(int a,int b,int m){int ans=1;while(b){if(b&1){ans=(ans*a)%m;}b>>=1;a=(a*a)%m;}return ans;}
int binpow(int a,int b){int ans=1;while(b){if(b&1){ans=(ans*a);}b>>=1;a=(a*a);}return ans;}

const int N = 2e5 + 10;
 
vector <int> g[N], cost[N];

int up[N][30];
int tin[N], tout[N], ch[N], par[N], notch[N];
int timer;

void dfs(int v, int p){
	par[v] = p;
	tin[v] = timer++;
	up[v][0] = p;
	for (int i=1; i<=25; ++i)
		up[v][i] = up[up[v][i-1]][i-1];
	for(auto to : g[v]){
		if(to == p)continue;
		dfs(to, v);
	}
	tout[v] = timer++;
}

bool upper (int a, int b) {
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}
bool upper2 (int a, int b) {
	return tin[a] < tin[b] && tout[a] > tout[b];
}

int lca (int a, int b) {
	if (upper (a, b))  return a;
	if (upper (b, a))  return b;
	for (int i=25; i>=0; --i)
		if (! upper (up[a][i], b))
			a = up[a][i];
	return up[a][0];
}

main(){
    ios :: sync_with_stdio(0);
    cin.tie(0);
    int n, m, q;
    cin >> n >>  m >> q;
    vector <pair <int, int> > road = {{-1, -1}};
    for(int i = 0; i < n - 1; i++){
		int a, b;
		cin >> a >> b;
		road.pb({a, b});
		g[a].pb(b);
		g[b].pb(a);
	}
	dfs(1, 1);
	for(int i = 1; i <= n; i++){
		int x = road[i].ff, y = road[i].ss; 
		if(par[x] == y){
			ch[i] = x;
			notch[i] = y;
		}else{
			ch[i] = y;
			notch[i] = x;
		}
	}
	set <int> st;
	vector <int> pref = {0};
	int mr = 0;
	for(int i = 0; i < m; i++){
		int ind, silv;
		cin >> ind >> silv;
		pref.pb(silv);
		st.insert(ind);
		mr = ch[ind];
		cost[ch[ind]].pb(silv);
	}
	sort(all(pref));
	for(int i = 1; i <= m; i++){
		pref[i] += pref[i - 1];
	}
	
	if((int)st.size() == 1){
		for(int i = 0; i < q; i++){
			int f, s, gold, silv;
			cin >> f >> s >> gold >> silv;
			int lc = lca(f, s);
			//cout << mr <<"====" << endl;
			if(upper2(lc, mr) && upper(mr, f) || upper(mr, s) && upper2(lc, mr)){
				int ind = upper_bound(all(pref), silv) - pref.begin();
			//	cout << ind <<"->"<< m << endl;
				if(gold < (m - ind + 1)){
					cout <<"-1\n";
				}else{
					cout << gold - (m - ind + 1) << endl;
				}
			}else{
				cout << gold << endl;
			}
		}
		return 0;
	}	 	
	//cout << "====" << endl;
	for(int i = 0; i < q; i++){
		int f, s, gold, silv;
		cin >> f >> s >> gold >> silv;
		vector <int> c;
		int lc = lca(f, s);
		while(s != lc){
			for(auto x : cost[s]){
				c.pb(x);
			}
			s= par[s];
		}
		while(f != lc){
			for(auto x : cost[f]){
				c.pb(x);
			}
			f = par[f];
			
		}
			sort(all(c));
			for(auto x : c){
				if(silv >= x){
					silv -= x;
				}else{
					gold--;
				}
			}
			if(gold < 0){
				cout << "-1\n";
			}else{
				cout << gold << endl;
			}
	}
}

Compilation message

currencies.cpp:53:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   53 | main(){
      | ^~~~
currencies.cpp: In function 'int main()':
currencies.cpp:99:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   99 |    if(upper2(lc, mr) && upper(mr, f) || upper(mr, s) && upper2(lc, mr)){
      |       ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
currencies.cpp: In function 'void fp(std::string)':
currencies.cpp:12:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:12:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 19292 KB Output is correct
2 Correct 3 ms 19292 KB Output is correct
3 Correct 4 ms 19292 KB Output is correct
4 Correct 3 ms 19292 KB Output is correct
5 Correct 7 ms 19544 KB Output is correct
6 Correct 8 ms 19548 KB Output is correct
7 Correct 8 ms 19292 KB Output is correct
8 Correct 8 ms 19548 KB Output is correct
9 Correct 8 ms 19548 KB Output is correct
10 Correct 8 ms 19340 KB Output is correct
11 Correct 8 ms 19548 KB Output is correct
12 Correct 8 ms 19368 KB Output is correct
13 Correct 70 ms 19800 KB Output is correct
14 Correct 70 ms 19636 KB Output is correct
15 Correct 36 ms 19544 KB Output is correct
16 Correct 27 ms 19544 KB Output is correct
17 Correct 21 ms 19548 KB Output is correct
18 Correct 38 ms 19592 KB Output is correct
19 Correct 9 ms 19548 KB Output is correct
20 Correct 7 ms 19548 KB Output is correct
21 Correct 7 ms 19548 KB Output is correct
22 Correct 7 ms 19592 KB Output is correct
23 Correct 57 ms 19548 KB Output is correct
24 Correct 45 ms 19548 KB Output is correct
25 Correct 45 ms 19548 KB Output is correct
26 Correct 7 ms 19548 KB Output is correct
27 Correct 7 ms 19548 KB Output is correct
28 Correct 8 ms 19460 KB Output is correct
29 Correct 8 ms 19548 KB Output is correct
30 Correct 8 ms 19548 KB Output is correct
31 Correct 8 ms 19588 KB Output is correct
32 Correct 8 ms 19548 KB Output is correct
33 Correct 67 ms 19600 KB Output is correct
34 Correct 73 ms 19548 KB Output is correct
35 Correct 68 ms 19544 KB Output is correct

Subtask #2
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 19288 KB Output is correct
2 Correct 10 ms 19544 KB Output is correct
3 Correct 8 ms 19548 KB Output is correct
4 Correct 9 ms 19584 KB Output is correct
5 Correct 269 ms 55300 KB Output is correct
6 Correct 313 ms 44472 KB Output is correct
7 Correct 272 ms 49340 KB Output is correct
8 Correct 252 ms 48832 KB Output is correct
9 Correct 221 ms 49816 KB Output is correct
10 Correct 315 ms 55488 KB Output is correct
11 Correct 326 ms 55904 KB Output is correct
12 Correct 362 ms 55468 KB Output is correct
13 Correct 339 ms 55932 KB Output is correct
14 Correct 325 ms 55444 KB Output is correct
15 Execution timed out 5042 ms 60984 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 19292 KB Output is correct
2 Correct 69 ms 19548 KB Output is correct
3 Correct 72 ms 19804 KB Output is correct
4 Correct 77 ms 19544 KB Output is correct
5 Execution timed out 5057 ms 56320 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 19292 KB Output is correct
2 Correct 3 ms 19292 KB Output is correct
3 Correct 4 ms 19292 KB Output is correct
4 Correct 3 ms 19292 KB Output is correct
5 Correct 7 ms 19544 KB Output is correct
6 Correct 8 ms 19548 KB Output is correct
7 Correct 8 ms 19292 KB Output is correct
8 Correct 8 ms 19548 KB Output is correct
9 Correct 8 ms 19548 KB Output is correct
10 Correct 8 ms 19340 KB Output is correct
11 Correct 8 ms 19548 KB Output is correct
12 Correct 8 ms 19368 KB Output is correct
13 Correct 70 ms 19800 KB Output is correct
14 Correct 70 ms 19636 KB Output is correct
15 Correct 36 ms 19544 KB Output is correct
16 Correct 27 ms 19544 KB Output is correct
17 Correct 21 ms 19548 KB Output is correct
18 Correct 38 ms 19592 KB Output is correct
19 Correct 9 ms 19548 KB Output is correct
20 Correct 7 ms 19548 KB Output is correct
21 Correct 7 ms 19548 KB Output is correct
22 Correct 7 ms 19592 KB Output is correct
23 Correct 57 ms 19548 KB Output is correct
24 Correct 45 ms 19548 KB Output is correct
25 Correct 45 ms 19548 KB Output is correct
26 Correct 7 ms 19548 KB Output is correct
27 Correct 7 ms 19548 KB Output is correct
28 Correct 8 ms 19460 KB Output is correct
29 Correct 8 ms 19548 KB Output is correct
30 Correct 8 ms 19548 KB Output is correct
31 Correct 8 ms 19588 KB Output is correct
32 Correct 8 ms 19548 KB Output is correct
33 Correct 67 ms 19600 KB Output is correct
34 Correct 73 ms 19548 KB Output is correct
35 Correct 68 ms 19544 KB Output is correct
36 Correct 3 ms 19288 KB Output is correct
37 Correct 10 ms 19544 KB Output is correct
38 Correct 8 ms 19548 KB Output is correct
39 Correct 9 ms 19584 KB Output is correct
40 Correct 269 ms 55300 KB Output is correct
41 Correct 313 ms 44472 KB Output is correct
42 Correct 272 ms 49340 KB Output is correct
43 Correct 252 ms 48832 KB Output is correct
44 Correct 221 ms 49816 KB Output is correct
45 Correct 315 ms 55488 KB Output is correct
46 Correct 326 ms 55904 KB Output is correct
47 Correct 362 ms 55468 KB Output is correct
48 Correct 339 ms 55932 KB Output is correct
49 Correct 325 ms 55444 KB Output is correct
50 Execution timed out 5042 ms 60984 KB Time limit exceeded
51 Halted 0 ms 0 KB -