Submission #1125460

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125460		dwuy	Palindromic Partitions (CEOI17_palindromic)	C++17	100 / 100	46 ms	18916 KiB

palindromic

#include <bits/stdc++.h>
#define int long long
using namespace std;

const int MOD = 1e9 + 9999;
const int base = 307;
const int MX = 2000005;
int bp[MX];

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    bp[0] = 1;
    for(int i=1; i<MX; i++) bp[i] = bp[i-1] * base % MOD;

    int q;
    cin >> q;
    while(q--){
        string s; 
        cin >> s;
        int ans = 0;
        int i=0, j=(int)s.size()-1;
        int L = 0;
        int R = 0;
        int sz = 0;
        for(;i<j;i++,j--){
            L = (L*base + s[i])%MOD;
            R = (s[j]*bp[sz] + R)%MOD;
            sz++;
            if(L == R){
                ans += 2;
                L = R = 0;
                sz = 0;
            }
        }
        if(i <= j || L != 0 || R != 0) ans++;
        cout << ans << '\n';
    }

    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 40 / 40