oj.uz

Submission #973614

# Submission time Handle Problem Language Result Execution time Memory
973614 2024-05-02T08:32:48 Z vjudge1 Passport (JOI23_passport) C++17
6 / 100
 124 ms 29996 KB 
#include <time.h>
#include <cstdlib>
#include <stack>
#include <numeric>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <map>
#include <set>
#include <iterator>
#include <deque>
#include <queue>
#include <sstream>
#include <array>
#include <string>
#include <tuple>
#include <chrono>
#include <cassert>
#include <cstdio>
#include <cstring>
#include <list>
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <bitset>

using namespace std;

int tt = 1, n;
int a[200005], lf[200005], rg[200005];
int mn[4 * 200005], mx[4 * 200005];
void up(int l, int r, int pos, int num, int num1, int vv){
    if(l > pos || r < pos) return;
    if(l == r){
        mn[vv] = num;
        mx[vv] = num1;
        return; 
    }
    int mid = (l + r) / 2;
    up(l, mid, pos, num, num1, vv * 2);
    up(mid + 1, r, pos, num, num1, vv * 2 + 1);
    mn[vv] = min(mn[vv * 2], mn[vv * 2 + 1]);
    mx[vv] = max(mx[vv * 2], mx[vv * 2 + 1]);
}
int sbor(int l, int r, int l1, int r1, int vv){
    if(l > r1 || l1 > r) return 1e9;
    if(l >= l1 && r1 >= r) return mn[vv];
    int mid = (l + r) / 2;
    return min(sbor(l, mid, l1, r1, vv * 2), sbor(mid + 1, r, l1, r1, vv * 2 + 1));
}
int sbor1(int l, int r, int l1, int r1, int vv){
    if(l > r1 || l1 > r) return 0;
    if(l >= l1 && r1 >= r) return mx[vv];
    int mid = (l + r) / 2;
    return max(sbor1(l, mid, l1, r1, vv * 2), sbor1(mid + 1, r, l1, r1, vv * 2 + 1));
}
int dp[200005];
vector<int> g1[200005], g2[200005];
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> lf[i] >> rg[i];
        up(1, n, i, lf[i], rg[i], 1);
    }
    cin >> tt;
    while(tt--){
        int x;
        cin >> x;
        bool ok = 0;
        set<pair<int, int>> st1, st2;
        for(int i = 1; i <= n; i++){
            dp[i] = 1e9;
            g1[i].clear();
            g2[i].clear();
        }
        dp[x] = 0;
        int l = x - 1, r = x + 1, pos = x;
        st1.insert({dp[x], x});
        st2.insert({dp[x], x});
        g1[lf[x]].push_back(x);
        g2[rg[x]].push_back(x);
        int mn1 = l, mx1 = r;
        if(lf[x] == x) st1.erase({dp[x], x});
        if(rg[x] == x) st2.erase({dp[x], x});
        g1[x].clear();
        g2[x].clear();
        while(l >= 1 || r <= n){
            bool f1 = 0, f2 = 0;
            if(l > 0 && !st1.empty()){
                dp[l] = st1.begin()->first + 1;
                f1 = 1;
            }
            if(r <= n && !st2.empty()){
                dp[r] = st2.begin()->first + 1;
                f2 = 1;
            }
            // cout << l << " " << r << "\n";
            // cout << f1 << " " << f2 << "\n";
            if(!f1 && !f2){
                ok = 1;
                break;
            }
            if(f1 == 1 && l > 0 && rg[l] >= r && r <= n) dp[r] = min(dp[r], dp[l] + 1);
            if(f2 == 1 && r <= n && lf[r] <= l && l > 0) dp[l] = min(dp[l], dp[r] + 1);
            if(f1 == 1){
                if(lf[l] != l){
                    g1[lf[l]].push_back(l);
                    st1.insert({dp[l], l});
                }
                if(r <= n && rg[l] >= r){
                    st2.insert({dp[l], l});
                    g2[rg[l]].push_back(l);
                }
            }
            if(f2 == 1 && r <= n){
                if(rg[r] != r){
                    g2[rg[r]].push_back(r);
                    st2.insert({dp[r], r});
                }
                if(l > 0 && lf[r] <= l){
                    st1.insert({dp[r], r});
                    g1[lf[r]].push_back(r);
                }
            }
            if(f1 == 1){
                for(int to : g1[l])
                    st1.erase({dp[to], to});
                g1[l].clear();
            }
            if(f2 == 1){
                for(int to : g2[r])
                    st2.erase({dp[to], to});
                g2[r].clear();
            }
            // cout << dp[l] << " " << dp[r] << "\n" << "\n";
            if(f1 == 1) l--;
            if(f2 == 1) r++;
        }
        if(ok){
            cout << -1 << "\n";
            continue;
        }
        int ans = 0;
        for(int i = 1; i <= n; i++) ans = max(ans, dp[i]);
        cout << ans << "\n";
    }
}

Compilation message

passport.cpp: In function 'int main()':
passport.cpp:80:35: warning: unused variable 'pos' [-Wunused-variable]
   80 |         int l = x - 1, r = x + 1, pos = x;
      |                                   ^~~
passport.cpp:85:13: warning: unused variable 'mn1' [-Wunused-variable]
   85 |         int mn1 = l, mx1 = r;
      |             ^~~
passport.cpp:85:22: warning: unused variable 'mx1' [-Wunused-variable]
   85 |         int mn1 = l, mx1 = r;
      |                      ^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16988 KB Output is correct
2 Correct 4 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 124 ms 25244 KB Output is correct
5 Correct 82 ms 24240 KB Output is correct
6 Correct 86 ms 26748 KB Output is correct
7 Correct 93 ms 29996 KB Output is correct
8 Correct 59 ms 23904 KB Output is correct

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16984 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Incorrect 4 ms 16988 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16984 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Incorrect 4 ms 16988 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16984 KB Output is correct
2 Correct 3 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 3 ms 16988 KB Output is correct
5 Correct 4 ms 16988 KB Output is correct
6 Correct 3 ms 16988 KB Output is correct
7 Incorrect 4 ms 16988 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 16988 KB Output is correct
2 Correct 4 ms 16988 KB Output is correct
3 Correct 3 ms 16988 KB Output is correct
4 Correct 124 ms 25244 KB Output is correct
5 Correct 82 ms 24240 KB Output is correct
6 Correct 86 ms 26748 KB Output is correct
7 Correct 93 ms 29996 KB Output is correct
8 Correct 59 ms 23904 KB Output is correct
9 Correct 3 ms 16984 KB Output is correct
10 Correct 3 ms 16988 KB Output is correct
11 Correct 3 ms 16988 KB Output is correct
12 Correct 3 ms 16988 KB Output is correct
13 Correct 4 ms 16988 KB Output is correct
14 Correct 3 ms 16988 KB Output is correct
15 Incorrect 4 ms 16988 KB Output isn't correct
16 Halted 0 ms 0 KB -