Submission #370847

#	Time	Username	Problem	Language	Result	Execution time	Memory
370847		Traduttore	Exam (eJOI20_exam)	C++14	26 / 100	1084 ms	3564 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;
}
vector <int> dp((int)(1e5) ^ 1);
vector <int> dp3((int)(1e5) ^ 1);
void solve2() {
	reverse(a.begin(),a.end());
	reverse(b.begin(),b.end());
for (int i = 0;i < n;i++)
{
    int oz = dp[i];
    int mx = 0;
    vector <int> dp2;
    dp2 = dp;
    for (int j = i;j < n;j++)
    {
    int kol = 0;
    	for (int q = j;q < n;q++)
    	{
    		if (a[q] > a[i]) continue;
    		if (a[i] == b[q]) ++kol;
    		dp2[q + 1] = max(dp2[q + 1],dp[j] + kol);
    	}
    }
    dp = dp2;
}
ans = dp[n];
reverse(a.begin(),a.end());
reverse(b.begin(),b.end());
for (int i = 0;i < n;i++)
{
    int oz = dp3[i];
    int mx = 0;
    vector <int> dp2;
    dp2 = dp3;
    for (int j = i;j < n;j++)
    {
    int kol = 0;
    	for (int q = j;q < n;q++)
    	{
    		if (a[q] > a[i]) continue;
    		if (a[i] == b[q]) ++kol;
    		dp2[q + 1] = max(dp2[q + 1],dp3[j] + kol);
    	}
    }
    dp3 = dp2;
}
ans = max(dp3[n],ans);
}
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:55:9: warning: unused variable 'oz' [-Wunused-variable]
   55 |     int oz = dp[i];
      |         ^~
exam.cpp:56:9: warning: unused variable 'mx' [-Wunused-variable]
   56 |     int mx = 0;
      |         ^~
exam.cpp:76:9: warning: unused variable 'oz' [-Wunused-variable]
   76 |     int oz = dp3[i];
      |         ^~
exam.cpp:77:9: warning: unused variable 'mx' [-Wunused-variable]
   77 |     int mx = 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