Submission #939290

#TimeUsernameProblemLanguageResultExecution timeMemory
939290vjudge1Palindromic Partitions (CEOI17_palindromic)C++17
100 / 100
47 ms1528 KiB
#include <bits/stdc++.h> //#include <ext/pb_ds/assoc_container.hpp> //#include <ext/pb_ds/tree_policy.hpp> using namespace std; //using namespace __gnu_pbds; bool YES(bool f){ if(f) cout << "Yes\n" ; else cout << "No\n" ; return f ; } void YES(){YES(1);} void NO(){YES(0);} void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);} //#define ordered_set tree<int, null_type,less_equal<int>, rb_tree_tag,tree_order_statistics_node_update> #define ios ios_base::sync_with_stdio(0) ; cin.tie(0) ; cout.tie(0); #define int long long #define ld long double #define pii pair <int , int> #define all(x) x.begin() , x.end() #define ff first #define ss second #define endl '\n' const int N = 1e6 + 5 ; const int inf = 1e16 ; const int mod = 1e9 + 8 ; const double eps = 1e-8 ; template <class T> bool chmax( T& x , const T& y ){ bool f = 0 ; if ( x < y ) x = y , f = 1 ; return f ; } template <class T> bool chmin( T &x , const T &y ){ bool f = 0 ; if ( x > y ) x = y , f = 1 ; return f ; } //code int n ; string s ; void solve(){ cin >> s ; n = s.size() ; int l = 0 , r = n - 1 , ans = 0 ; while ( l < r ){ int a = (s[l]-'a'+1)*31 , b = (s[r]-'a'+1)*31 , p = 31*31 ; l ++ ; r -- ; while ( l < r && a != b ){ a += (s[l]-'a'+1)*p ; a %= mod ; b *= 31 ; b%= mod ; b += (s[r]-'a'+1)*31 ; b %= mod ; l ++ , r -- ; p = (p*31)%mod ; } if ( a == b ) ans += 2 ; else if ( l != r ) ans ++ ; } if ( l == r ) ans ++ ; cout << ans << endl ; } signed main(){ ios ; int t = 1 ; cin >> t ; while ( t -- ) solve() ; }

Compilation message (stderr)

palindromic.cpp: In function 'void fopn(std::string)':
palindromic.cpp:10:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
palindromic.cpp:10:72: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 | void fopn(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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