Submission #370838

#	Time	Username	Problem	Language	Result	Execution time	Memory
370838		Traduttore	Exam (eJOI20_exam)	C++14	12 / 100	1096 ms	3948 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)(1e5) ^ 1];
void solve2() {
for (int i = 0;i < n;i++)
{
    int kol = 0;
    unordered_map <int,int> mp;
    int mx = 0;
    for (int j = i;j < n;j++)
    {
    	mx = max(mx,a[j]);
    	++mp[b[j]];
    	dp[j + 1] = max(dp[j + 1],dp[i] + mp[mx]);
    }
}
ans = dp[n];
}
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:52:9: warning: unused variable 'kol' [-Wunused-variable]
   52 |     int kol = 0;
      |         ^~~

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