oj.uz

Submission #477810

# Submission time Handle Problem Language Result Execution time Memory
477810 2021-10-04T01:35:57 Z sumit_kk10 Pancake (NOI12_pancake) C++14
25 / 25
 293 ms 12016 KB 
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL)
#define ll long long int
#define ld long double
using namespace std;
const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
int n;
map<vector<int>, int> ans;
map<vector<int>, bool> vis;

void solve(){
    cin >> n;
    vector<pair<int, int> > a(n);
    for(int i = 0; i < n; ++i){
        cin >> a[i].first;
        a[i].second = i;
    }
    sort(a.begin(), a.end());
    int ct = 0;
    vector<int> v(n);
    for(int i = 0; i < a.size(); ++i)
        v[a[i].second] = ++ct;
    reverse(v.begin(), v.end());
    cout << ans[v] << "\n";
}

int main(){
    fast;
    vector<int> cur;
    queue<pair<vector<int>, int> > q;
    for(int i = 1; i <= 8; ++i){
        cur.push_back(i);
        q.push({cur, 0});
    }
    while(!q.empty()){
        vector<int> temp = q.front().first;
        int dis = q.front().second;
        q.pop();
        vis[temp] = true;
        ans[temp] = dis;
        for(int i = 1; i < temp.size(); ++i){
            // flipping 0..i;
            vector<int> gar;
            for(int j = i; j >= 0; --j)
                gar.push_back(temp[j]);
            for(int j = i + 1; j < temp.size(); ++j)
                gar.push_back(temp[j]);
            if(vis[gar]) continue;
            vis[gar] = true;
            q.push({gar, dis + 1});
        }
    }
    int t = 1;
    cin >> t;
    while(t--)
        solve();
    return 0;
}

Compilation message

pancake.cpp: In function 'void solve()':
pancake.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i = 0; i < a.size(); ++i)
      |                    ~~^~~~~~~~~~
pancake.cpp: In function 'int main()':
pancake.cpp:42:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(int i = 1; i < temp.size(); ++i){
      |                        ~~^~~~~~~~~~~~~
pancake.cpp:47:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |             for(int j = i + 1; j < temp.size(); ++j)
      |                                ~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 275 ms 11852 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 262 ms 11944 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 287 ms 11848 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 293 ms 11872 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 290 ms 12016 KB Output is correct