Submission #370974

#	Time	Username	Problem	Language	Result	Execution time	Memory
370974		Traduttore	Exam (eJOI20_exam)	C++14	26 / 100	33 ms	3436 KiB

exam

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define F first
#define S second
#define pb push_back
#define ld long double
#define int ll
#define pll pair <ll,ll>
#define IOS ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define TIME 1.0*clock()/CLOCKS_PER_SEC
using namespace std;
using namespace __gnu_pbds;
mt19937_64 gen(time(0));
int n,q;
vector <int> a;
vector <int> b;
void init() {
    cin>>n;
    a.resize(n);
    for (int i = 0;i < n;i++)
        cin>>a[i];
    b.resize(n);
    for (int i = 0;i < n;i++)
        cin>>b[i];
}
ll ans = 0;
void output() {
    cout<<ans<<'\n';
}
void solve() {
    bool can = true;
    int pos = -1;
    int kol = 0;
    for (int i = 0;i < n;i++)
    {
    	if (a[i] > b[i]) {
    		if (can != true) ans+=kol;
    		can = true;
    		kol = 0;
    	}
    	else if (a[i] == b[i]) {++kol;can = false;}
    	else ++kol;
    }
    if (can != true) ans+=kol;
}
int dp[(int)(404)][(int)(404)];
void solve2() {
    map <int,int> mp;
    int kol = 0;
    vector <int> c;
    for (int i = 0;i < n;i++)
        c.pb(a[i]);
    for (int i = 0;i < n;i++)
        c.pb(b[i]);
    sort(c.begin(),c.end());
    for (int i = 0;i < n;i++)
    {
        a[i] = lower_bound(c.begin(),c.end(),a[i])-c.begin();
    }
    for (int i = 0;i < n;i++)
    {
        b[i] = lower_bound(c.begin(),c.end(),b[i])-c.begin();
    }
    for (int i = 0;i < n;i++)
    {
        for (int j = i;j < n;j++)
        {
            int oz = 0;
            for (int q = 0;q < 404;q++)
                oz = max(oz,dp[j][q]);
            int kol = 0;
            for (int q = j;q < n;q++)
            {
                if (a[q] > a[i]) {
                    break;
                    }
                //continue;
                if (b[q] == a[i]) ++kol;
                dp[q + 1][a[i]] = max(dp[q + 1][a[i]],oz + kol);
            }
        }
    }
    for (int i = 0;i < 404;i++)
        ans = max(ans,dp[n][i]);
}
int32_t main() {
    srand(time(0));
  //freopen("input.txt","r",stdin);
 // freopen("output.txt","w",stdout);
IOS;
int test;
test = 1;
while (test--) {
    init();
    bool has = true;
    for (int i = 0;i < n - 1;i++)
    if (b[i] != b[i + 1]) {
        has = false;
        break;
    }
    if (has == true) solve();
    else solve2();
    output();
}
exit(0);}
/*3 5 7 9 10 11*/
/*5 14 13 8 14 11*/

Compilation message (stderr)

exam.cpp: In function 'void solve()':
exam.cpp:34:9: warning: unused variable 'pos' [-Wunused-variable]
   34 |     int pos = -1;
      |         ^~~
exam.cpp: In function 'void solve2()':
exam.cpp:51:9: warning: unused variable 'kol' [-Wunused-variable]
   51 |     int kol = 0;
      |         ^~~

• Subtask 1: 14 / 14
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22