Submission #963952

#	Time	Username	Problem	Language	Result	Execution time	Memory
963952		Aiperiii	Money (IZhO17_money)	C++14	45 / 100	221 ms	262144 KiB

money

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N=1e3+5;
int cnt[N][N];
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n;
    cin>>n;
    vector <int> a(n+1);
    vector <int> sr;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    vector <int> v;
    vector <vector <int> > vec;
    vec.pb({});
    for(int i=1;i<=n;i++){
        v.pb(a[i]);
        vec.pb(v);
    }
    for(int i=0;i<vec.size();i++){
        sort(all(vec[i]));
    }
    for(int i=0;i<=n;i++){
        for(int j=0;j<=n;j++){
            cnt[i][j]=1e9;
        }
    }
    cnt[0][0]=0;
    for(int i=1;i<=n;i++){
        for(int j=i;j<=n;j++){
            int mn=1e9,ind=-1;
            for(int k=j;k>=i;k--){
                bool ok=0;
                auto it=upper_bound(all(vec[k-1]),a[k]);
                if(it==vec[k-1].end() or *it>=a[j])ok=1;
                if(ok){
                    cnt[i][j]=min(cnt[i][j],cnt[i-1][k-1]+1);
                }
                if(k-1>=i && a[k]<a[k-1])break;
            }
        }
    }
    for(int i=1;i<=n;i++){
        if(cnt[i][n]!=1e9){
            cout<<i<<"\n";return 0;
        }
    }
}

/*
6
3 6 4 5 1 2
*/

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:27:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0;i<vec.size();i++){
      |                 ~^~~~~~~~~~~
money.cpp:38:17: warning: unused variable 'mn' [-Wunused-variable]
   38 |             int mn=1e9,ind=-1;
      |                 ^~
money.cpp:38:24: warning: unused variable 'ind' [-Wunused-variable]
   38 |             int mn=1e9,ind=-1;
      |                        ^~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 0 / 55