oj.uz

Submission #734565

# Submission time Handle Problem Language Result Execution time Memory
734565 2023-05-02T16:15:49 Z Huseyn123 Ekoeko (COCI21_ekoeko) C++17
30 / 110
 19 ms 27716 KB 
#include <bits/stdc++.h>
#define MAX 200001
#define INF LLONG_MAX
#define MOD 1000000007
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ins insert
#define ff first
#define ss second
#define gett(x,m) get<m>(x)
#define all(a) a.begin(),a.end()
#define lb(a,b) lower_bound(all(a),b)
#define ub(a,b) upper_bound(all(a),b)
#define sortv(a) sort(all(a))
#define sorta(a,sz) sort(a,a+sz)
#define inputar(a,b){\
    for(int i=0;i<b;i++){\
        cin >> a[i];\
    }\
}
#define inputvec(a,b){\
    for(int i=0;i<b;i++){\
        ll num;\
        cin >> num;\
        a.pb(num);\
    }\
}
#define outputar(a,b){\
    for(int i=0;i<b;i++){\
        cout << a[i] << " ";\
    }\
    cout << "\n";\
}
#define outputvec(a){\
    for(auto x:a){\
        cout << x << " ";\
    }\
    cout << "\n";\
}
#define reset(a,n,v){\
    for(int i=0;i<n;i++){\
        a[i]=v;\
    }\
}
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef tuple<ll,ll,ll> tll;
typedef pair<ll,ll> pll;
typedef double db;
typedef long double ldb;
inline void USACO(string filename){
  freopen((filename+".in").c_str(),"r",stdin);
  freopen((filename+".out").c_str(),"w",stdout);
}
ll n,q,t=1,m,n2,m2,k,cnt=0,x,y,z,x2,y2,z2,res1=0,a[MAX],b[MAX];
ll c[1501][1501];
ll fact[MAX];
ll inv_fact[MAX];
string str[MAX];
string s1,s2;
const int mod = 998244353;
ll dx[4]={1,0,0,-1};
ll dy[4]={0,1,-1,0};
struct custom_hash {
   static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
ll sum[MAX];
void update(ll i,ll v){
    while(i<=n){
        sum[i]+=v;
        i+=(i&(-i));
    }
}
ll query(ll i){
    ll res=0;
    while(i>=1){
        res+=sum[i];
        i-=(i&(-i));
    }
    return res;
}
void solve(){
    cin >> n;
    cin >> s1;
    for(int i=0;i<2*n;i++){
        a[s1[i]-'a']++;
    }
    string str1,str2;
    str1=str2="";
    ll res=0;
    for(int i=0;i<2*n;i++){
        if(b[s1[i]-'a']<a[s1[i]-'a']/2){
            res+=i-str1.size();
            str1+=s1[i];
        }
        else{
            str2+=s1[i];
        }
        b[s1[i]-'a']++;
    }
    reset(a,26,0);
    ll c[26][n];
    for(int i=0;i<n;i++){
        c[str1[i]-'a'][a[str1[i]-'a']]=i+1;
        a[str1[i]-'a']++;
    }
    reset(a,26,0);
    for(int i=0;i<n;i++){
        res+=query(n)-query(c[str2[i]-'a'][a[str2[i]-'a']]);
        update(c[str2[i]-'a'][a[str2[i]-'a']],1);
        b[str2[i]-'a']++;
    }
    cout << res << "\n";
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //USACO("poetry");
    //freopen("input.txt","r",stdin);
    //cin >> t;
    ll cnt1=1;
    while(t--){
        solve();
        cnt1++;
    }
}
/*
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
ifstream fin("template.in");
ofstream fout("template.out");
*/
/*
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
ifstream fin("template.in");
ofstream fout("template.out");
*/
/*
ll b[51][51];
b[0][0] = 1;
    for (int n = 1; n <= 50; ++n){
        b[n][0] = b[n][n] = 1;
        for (int k = 1; k < n; ++k)
            b[n][k] = b[n - 1][k - 1] + b[n - 1][k];
    }
*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 9 ms 13716 KB Output is correct
3 Correct 14 ms 20764 KB Output is correct
4 Correct 19 ms 27716 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 9 ms 13716 KB Output is correct
3 Correct 14 ms 20764 KB Output is correct
4 Correct 19 ms 27716 KB Output is correct
5 Correct 4 ms 6592 KB Output is correct
6 Correct 3 ms 6612 KB Output is correct
7 Correct 3 ms 6600 KB Output is correct
8 Correct 3 ms 6612 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 9 ms 13716 KB Output is correct
3 Correct 14 ms 20764 KB Output is correct
4 Correct 19 ms 27716 KB Output is correct
5 Correct 4 ms 6484 KB Output is correct
6 Incorrect 19 ms 27616 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 6612 KB Output is correct
2 Incorrect 3 ms 6740 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6484 KB Output is correct
2 Correct 9 ms 13716 KB Output is correct
3 Correct 14 ms 20764 KB Output is correct
4 Correct 19 ms 27716 KB Output is correct
5 Correct 4 ms 6592 KB Output is correct
6 Correct 3 ms 6612 KB Output is correct
7 Correct 3 ms 6600 KB Output is correct
8 Correct 3 ms 6612 KB Output is correct
9 Correct 4 ms 6484 KB Output is correct
10 Incorrect 19 ms 27616 KB Output isn't correct
11 Halted 0 ms 0 KB -