oj.uz

Submission #873449

# Submission time Handle Problem Language Result Execution time Memory
873449 2023-11-15T06:11:02 Z vjudge1 Colors (RMI18_colors) C++17
0 / 100
 76 ms 21412 KB 
// #pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")  
#include<bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define sz(x) (int)x.size()
#define bit(a, i) ((a>>i)&1)

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

const int P = 31;
const int K = 400;
const ll inf = 1e9;
const ll INF = 1e18;
const int mod = 1e9+7;
const int maxn = 2e5 + 10;
const int dx[] = {0, 0, -1, 1};
const int dy[] = {1, -1, 0, 0};

int timer;
int a[maxn];
int b[maxn];
int c[maxn];
int n, m, sz;
int us[maxn];
int tin[maxn];
int t[2][maxn*4];
vector<int>g[maxn];
map<int, int>dp[maxn];

int dfs(int v, int x){
    us[v] = sz;
    if(a[v] < x) return 0;
    if(b[v] > x) return 0;
    if(a[v] == x) return 1;
    if(dp[v][x] > 0) return dp[v][x]-1; 
    int ans = 0;
    for(int to: g[v]){
        if(us[to] < sz && dfs(to, x)) {
            ans = 1;
            break;
        }
    } dp[v][x] = ans + 1;
    return ans;
}

void dfs1(int v, int pr){
    tin[v] = ++timer;
    c[tin[v]] = v;
    for(int to: g[v]){
        if(to != pr)
            dfs1(to, v);
    }
}

void build(int v=1, int tl=1, int tr=n){
    if(tl == tr){
        t[0][v] = a[c[tl]];
        t[1][v] = b[c[tl]];
    } else{
        int tm = tl+tr>>1;
        build(v<<1, tl, tm);
        build(v<<1|1, tm+1, tr);
        t[0][v] = max(t[0][v<<1], t[0][v<<1|1]);
        t[1][v] = min(t[1][v<<1], t[1][v<<1|1]);
    }
}

pii merge(pii a, pii b){
    return {max(a.f, b.f), min(a.s, b.s)};
}

pii get(int l, int r, int v=1, int tl=1, int tr=n){
    if(l > tr || r < tl) return {inf, 0};
    if(l <= tl && tr <= r) return {t[0][v], t[1][v]};
    int tm = tl+tr>>1;
    return merge(get(l, r, v<<1, tl, tm), get(l, r, v<<1|1, tm+1, tr));
}

int ihtw1(){
    sz++;
    timer = 0;
    for(int i=1; i<=n; i++){
        if(sz(g[i]) == 1){
            dfs1(i, 0);
            break;
        }
    }
    build();
    map<int, int>mp;
    for(int i=1; i<=n; i++){
        if(mp[b[i]]){
            pii x = get(mp[b[i]], i);
            us[i] = sz * (x.f >= b[i] && x.s <= b[i]);
        } mp[a[i]] = i;
    } mp.clear();
    for(int i=n; i>0; i--){
        if(mp[b[i]]){
            pii x = get(i, mp[b[i]]);
            us[i] = sz * (x.f >= b[i] && x.s <= b[i]);
        } mp[a[i]] = i;
    } int ans = 1;
    for(int i=1; i<=n; i++) ans &= (us[i]==sz);
    return ans;
}

void ihtw(){
    set<int>st;
    cin >> n >> m;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=1; i<=n; i++) {
        cin >> b[i];
        g[i].clear();
        dp[i].clear();
        st.insert(a[i]);
    }
    for(int i=0; i<m; i++){
        int u, v;
        cin >> u >> v;
        g[u].pb(v);
        g[v].pb(u);
    } bool ok = 1;
    for(int i=1; i<=n; i++){
        if(sz(g[i]) > 2) ok = 0;
    }
    if(m == n-1 && ok) {
        cout << ihtw1() << "\n";
        return;
    }
    // if(m == n-1 && sz(st) == n) ihtw2();
    for(int i=1; i<=n; i++){
        sz++;
        if(!dfs(i, b[i])){
            cout << "0\n";
            return;
        }
    } cout << "1\n";
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int t; cin >> t;
    while(t--) ihtw();
}

Compilation message

colors.cpp: In function 'void build(int, int, int)':
colors.cpp:64:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   64 |         int tm = tl+tr>>1;
      |                  ~~^~~
colors.cpp: In function 'pii get(int, int, int, int, int)':
colors.cpp:79:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   79 |     int tm = tl+tr>>1;
      |              ~~^~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 44 ms 21164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 33 ms 21152 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 70 ms 21412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 70 ms 21412 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 44 ms 21164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 76 ms 21084 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 21084 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 44 ms 21164 KB Output isn't correct
2 Halted 0 ms 0 KB -