제출 #785622

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
785622		amukkalir	Sprinkler (JOI22_sprinkler)	C++17	3 / 100	949 ms	18516 KiB

sprinkler

#include "bits/stdc++.h"
using namespace std; 

typedef long long ll; 
#define pii pair<int,int> 
#define fi first 
#define se second 
#define pb push_back

const int N = 2e5; 
long long h[N+5]; 
int n, l; 
vector<int> adj[N+5]; 
bool vis[N+5][45];

void dfs (int u, int prv, long long w, int dst) {
    if (dst < 0) return; 
    h[u] *= w; 
    h[u] %= l;
    //cerr << u << " lalala " << h[u] << endl;  
    for (int v : adj[u]) {
        if (v==prv) continue; 
        dfs(v, u, w, dst-1); 
    }
}

void dfs4 (int u, int prv, long long w, int dst) {
    if (dst < 0) return; 
    if (vis[u][dst]) return; 
    vis[u][dst] = true; 
    h[u] *= w; 
    h[u] %= l;
    //cerr << u << " lalala " << h[u] << endl;  
    for (int v : adj[u]) {
        if (v==prv) continue; 
        dfs4(v, u, w, dst-1); 
    }
}

int lst[N+5]; 

int sqr; 

int mul (ll a, ll b) {
    int res = (a*b) % l; 
    return res; 
}

long long ht[N+5]; 
void dfs2 (int u, int prv, long long w, int dst) {
    ht[u] = mul(ht[u], w); 
    if (dst == 0) return; 

    //cerr << u << " lalala " << h[u] << endl;  
    if (dst==1 && adj[u].size() < sqr) {
        for (int v : adj[u]) {
            if (v==prv) continue; 
            dfs2(v, u, w, dst-1); 
        }
    } 
}

void sub2() {
    int q; cin>>q; 
    sqr = sqrt(n); 
    for(int i=1; i<=n; i++) {
        ht[i] = 1;
    }
    for(int tm = 1; tm <= q; tm++) {
        int tp; 
        cin >> tp; 
        if (tp == 1) {
            int x, d, w; 
            cin >> x >> d >> w;
            if (d == 0) h[x] = mul(h[x], w);  
            else dfs2(x, 0, w, d); 
        } else {
            int x;
            cin >> x; 
            ll res = mul(h[x], ht[x]); 
            if (adj[x].size() < sqr) {
                for (int u : adj[x]) {
                    res = mul(res, ht[u]);
                }
            }
            cout << res << endl; 
        }
    }
}

void sub4() {
    int q; cin>>q; 
    while (q--) {
        int tp; 
        cin >> tp; 
        if (tp == 1) {
            int x, d, w; 
            cin >> x >> d >> w; 
            dfs4(x, 0, w, d); 
        } else {
            int x;
            cin >> x; 
            cout << h[x] << endl; 
        }
    }
}

void sub1() {
    int q; cin>>q; 
    while (q--) {
        int tp; 
        cin >> tp; 
        if (tp == 1) {
            int x, d, w; 
            cin >> x >> d >> w; 
            dfs(x, 0, w, d); 
        } else {
            int x;
            cin >> x; 
            cout << h[x] << endl; 
        }
    }
}

signed main () {
    int t=1; 
    //scanf("%d", &t);
    while(t--) {
        cin >> n >> l; 
        for(int i=1; i<n; i++) {
            int a, b; 
            cin >> a >> b; 
            adj[a].pb(b);
            adj[b].pb(a); 
        }
        for (int i=1; i<=n; i++) {
            cin >> h[i]; 
        } 
        if (n <= 1000) sub1(); 
        else sub2(); 
    }
}

컴파일 시 표준 에러 (stderr) 메시지

sprinkler.cpp: In function 'void dfs2(int, int, long long int, int)':
sprinkler.cpp:55:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |     if (dst==1 && adj[u].size() < sqr) {
      |                   ~~~~~~~~~~~~~~^~~~~
sprinkler.cpp: In function 'void sub2()':
sprinkler.cpp:81:31: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   81 |             if (adj[x].size() < sqr) {
      |                 ~~~~~~~~~~~~~~^~~~~

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