oj.uz

답안 #467795

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
467795 2021-08-24T13:38:54 Z Carmel_Ab1 Palindromic Partitions (CEOI17_palindromic) C++17
100 / 100
 407 ms 12900 KB 
#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//using namespace __gnu_pbds;
using namespace std;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int>vi;
typedef vector<vector<int>>vvi;
typedef vector<ll>vl;
typedef vector<vl> vvl;
typedef pair<int,int>pi;
typedef pair<ll,ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld,ld> pld;
//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T> ostream& operator<<(ostream& os, vector<T>& a){os<<"[";for(int i=0; i<ll(a.size()); i++){os << a[i] << ((i!=ll(a.size()-1)?" ":""));}os << "]\n"; return os;}

#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map

template<typename T1, typename T2> istream& operator>>(istream& is, pair<T1, T2>& p){is >> p.first >> p.second;return is;}
template<typename T1, typename T2> ostream& operator<<(ostream& os, pair<T1, T2>& p){os <<"" << p.first << " " << p.second << ""; return os;}
void usaco(string taskname){
    string fin = taskname + ".in";
    string fout = taskname + ".out";
    const char* FIN = fin.c_str();
    const char* FOUT = fout.c_str();
    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);
}
template<typename T>
void read(vector<T>& v){
    int n=v.size();
    for(int i=0; i<n; i++)
        cin >> v[i];
}
template<typename T>
vector<T>UNQ(vector<T>a){
    vector<T>ans;
    for(T t:a)
        if(ans.empty() || t!=ans.back())
            ans.push_back(t);
    return ans;
}
ll ceil(ll a,ll b){
    ll ans=a/b;
    if(a%b)ans++;
    return ans;
}
ld log (ld a,ld b){return log(b)/log(a);}
ll power(ll base, ll exp,ll M=1e18){//(base^exp)%M
    ll ans=1;
    while(exp){
        if(exp%2==1)ans=((ans%M)*(base%M))%M;
        base=((base%M)*(base%M))%M;
        exp/=2;
    }
    return ans;
}

string to_base(int n,int new_base){
    string s;
    int nn=n;
    while(nn){
        s+=to_string(nn%new_base);
        nn/=new_base;
    }
    reverse(all(s));
    return s;
}
ll gcd(ll a,ll b){
    if(a<b)swap(a,b);
    if(b==0)return a;
    return gcd(b,a%b);
}
ll lcm(ll a,ll b){
    ll x= (a/gcd(a,b));
    return b*x;
}
vl generate_array(ll n,ll mn=1,ll mx=1e18+1){
    if(mx==1e18+1)
        mx=n;
    vl ans(n);
    for(int i=0; i<n;i++)
        ans[i]=(mn+rand()%(mx-mn+1));
    return ans;
}
string substr(string s,int l,int r){
    string ans;
    for(int i=l; i<=r; i++)
        ans+=s[i];
    return ans;
}


void solve();
int main(){
    GLHF;
    int t=1;
    cin >> t;
    while(t--)
        solve();
}
void solve() {
    string s;
    cin >> s;
    int n=s.size();

    ll h1=0,h2=0;
    const ll p1=1e9+7,m2=1e9+9;

    ll ans=0;
    for(ll l=0,r=n-1,cur=0; l<=r;cur++, l++,r--){
        h1=(h1*26+s[l]-'a'+1)%p1;
        h2=(power(26,cur,p1)*(s[r]-'a'+1)+h2)%p1;

        if(h1==h2){
            ans+=2;
            if(l==r)
                ans--;
            h1=h2=0;
            cur=-1;
        }
        else if(l+1>=r-1) {
            ans++;
            break;
        }
    }
    out(ans)
}

Compilation message

palindromic.cpp: In function 'void solve()':
palindromic.cpp:121:23: warning: unused variable 'm2' [-Wunused-variable]
  121 |     const ll p1=1e9+7,m2=1e9+9;
      |                       ^~
palindromic.cpp: In function 'void usaco(std::string)':
palindromic.cpp:39:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     freopen(FIN, "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~
palindromic.cpp:40:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     freopen(FOUT, "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 3 ms 428 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 3 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct

Subtask #4
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 3 ms 428 KB Output is correct
11 Correct 3 ms 332 KB Output is correct
12 Correct 3 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 340 ms 12900 KB Output is correct
15 Correct 337 ms 7768 KB Output is correct
16 Correct 407 ms 11872 KB Output is correct
17 Correct 36 ms 6952 KB Output is correct