제출 #892234

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
892234		vjudge1	Sprinkler (JOI22_sprinkler)	C++17	3 / 100	9 ms	604 KiB

sprinkler

#include <bits/stdc++.h>
 
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
#define rnd(l, r) uniform_int_distribution<int>(l, r)(rng)
 
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;}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int N = 2e3, inf = 1e9;

vector <int> g[N];
int cost[N];
 
main(){
	iostream::sync_with_stdio(false);	
    cin.tie(nullptr);
    cout.tie(nullptr);
	int n, l;
	cin >> n >> l;
	for(int i = 0; i < n - 1; i ++){
		int a, b;
		cin >> a >> b;
		g[a].pb(b);
		g[b].pb(a);
	}
	for(int i =1; i <= n; i++){
		cin >> cost[i];
	}
	
	int q;
	cin >> q;
	while(q--){
		int tp;
		cin >> tp;
		if(tp == 1){
			int x, d, w;
			cin >> x >> d >> w;
			vector <int> dist(n + 1, inf);
			dist[x] = 0;
			queue <int> q;
			q.push(x);
			while(!q.empty()){
				int v = q.front();
				q.pop();
				for(auto to : g[v]){
					if(dist[to] > dist[v] + 1){
						dist[to] = dist[v] + 1;
						q.push(to);
					}
				}
			}
			
			for(int i = 1; i <= n; i++){
				if(dist[i] <= d){
					cost[i] = (cost[i] * w) % l;
				}
			}
		}else{
			int x;
			cin >> x;
			cout << cost[x] << endl;
		}
	}
	
}	
/*
 * Before implementing the problem:
	
	Do I understand the problem correctly?
	Which places are tricky? What do I need to remember to implement them correctly?
	Which place is the heaviest by implementation? Can I do it simpler?
	Which place is the slowest? Where do I need to be careful about constant factors and where I can choose slower but simpler implementation?
	----------------------------------
	If not AC:
 
	Did you remember to do everything to handle the tricky places you thought about before?
	Is the solution correct?
	Do I understand the problem correctly?
	----------------------------------
	If you have a test on which the solution gives wrong answer:
 
	Is the solution doing what it was supposed to do?
	Is the problem in the code or in the idea?
*/

컴파일 시 표준 에러 (stderr) 메시지

sprinkler.cpp:23:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main(){
      | ^~~~
sprinkler.cpp: In function 'void fp(std::string)':
sprinkler.cpp:13:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sprinkler.cpp:13:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | void fp(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 0 / 9
• Subtask 3: 0 / 29
• Subtask 4: 0 / 12
• Subtask 5: 0 / 30
• Subtask 6: 0 / 17