/// You just can't beat the person who never gives up
/// ICPC next year
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
using namespace std ;
const int N = 5e5+5 ,M = 3e6+5 ;
typedef unsigned long long ull ;
const int base = 29 ;
int mod[4] = {(int)1e9+9 ,(int)1e9+7 ,(int)1e9-63 ,(int)1e9-71};
struct rabinKarp{
int val[4] ;
rabinKarp(){
memset(val,0,sizeof val);
}
void push_back(int x){
for(int i=0;i<4;++i){
val[i] = (1ll * val[i] * base) %mod[i];
val[i] = (val[i] + x) %mod[i];
}
}
pair<ull ,ull> hashVal(){
ull a = val[0] ,b = val[2] ;
a *= 1e10 ,b *= 1e10 ;
a += val[1] ,b += val[3] ;
return {a ,b} ;
}
};
int n ;
char str[M] ;
vector<pair<ull,ull>> h[N] ;
map<pair<ull,ull> ,int> cnt ;
set<pair<ull,ull>> all ;
int main(){
scanf("%d",&n);
for(int i=0;i<n;++i){
scanf("%s",str);
int m = strlen(str);
reverse(str,str+m) ;
rabinKarp rbk ;
h[i].push_back(make_pair(0,0));
for(int j=0;j<m;++j){
rbk.push_back(str[j]-'a'+1);
h[i].push_back(rbk.hashVal());
}
++cnt[h[i][h[i].size()-2]] ;
all.insert(h[i].back());
}
int ans = 0 ;
for(int i=0;i<n;++i){
int cur = 0 ;
while(h[i].size()>=2 && all.count(h[i].back())){
cur += cnt[h[i][h[i].size()-2]] ;
h[i].pop_back();
}
ans = max(ans ,cur);
}
printf("%d",ans);
return 0;
}
Compilation message
rima.cpp: In function 'int main()':
rima.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&n);
~~~~~^~~~~~~~~
rima.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%s",str);
~~~~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
12 ms |
12032 KB |
Output is correct |
| 2 |
Correct |
13 ms |
12160 KB |
Output is correct |
| 3 |
Correct |
11 ms |
12032 KB |
Output is correct |
| 4 |
Execution timed out |
1060 ms |
127352 KB |
Time limit exceeded |
| 5 |
Correct |
317 ms |
66300 KB |
Output is correct |
| 6 |
Incorrect |
67 ms |
25176 KB |
Output isn't correct |
| 7 |
Incorrect |
54 ms |
21736 KB |
Output isn't correct |
| 8 |
Incorrect |
46 ms |
21732 KB |
Output isn't correct |
| 9 |
Incorrect |
268 ms |
77528 KB |
Output isn't correct |
| 10 |
Incorrect |
45 ms |
23148 KB |
Output isn't correct |
