Submission #122357

#	Time	Username	Problem	Language	Result	Execution time	Memory
122357		BThero	Palindromic Partitions (CEOI17_palindromic)	C++17	60 / 100	10047 ms	1408 KiB

palindromic

// Why am I so dumb? :c
// chrono::system_clock::now().time_since_epoch().count()

//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>

#define pb push_back
#define mp make_pair

#define all(x) (x).begin(), (x).end()

#define fi first
#define se second

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;   
template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int MAXN = (int)1e6 + 5;
const int INF = (int)1e9;

char s[MAXN];

int n, ans;

bool good(int l, int r) {
    int l2 = n - r + 1;

    for (int i = 0; i <= r - l; ++i) {
        if (s[l + i] != s[l2 + i]) {
            return 0;
        }
    }

    return 1;
}

void solve() {
    scanf("%s", s + 1);         
    for (n = 1; s[n]; ++n); 

    --n;
    ans = 0;

    for (int l = 1, r; l <= n; l = r + 1) {
        r = l;

        while (r * 2 <= n && !good(l, r)) {
            ++r;
        }

        if (r * 2 > n) {
            ++ans;
            break;            
        }

        ans += 2;

        if (r * 2 == n) {
            break;
        }                               
    }    

    printf("%d\n", ans);
}

int main() {
    int tt;
    scanf("%d", &tt);

    while (tt--) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

palindromic.cpp: In function 'void solve()':
palindromic.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", s + 1);         
     ~~~~~^~~~~~~~~~~~~
palindromic.cpp: In function 'int main()':
palindromic.cpp:75:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &tt);
     ~~~~~^~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 0 / 40