/// 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[2] = {(int)1e9+9 ,(int)1e9+7};
struct rabinKarp{
int val[2] ;
rabinKarp(){
memset(val,0,sizeof val);
}
void push_back(int x){
for(int i=0;i<2;++i){
val[i] = (1ll * val[i] * base) %mod[i];
val[i] = (val[i] + x) %mod[i];
}
}
ull hashVal(){
return (ull)val[0] * 1e10 + val[1] ;
}
};
int n ;
char str[M] ;
vector<ull> h[N] ;
unordered_map<ull ,int> cnt ;
unordered_map<ull ,bool> is ;
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(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]] ;
is[h[i].back()] = 1 ;
}
int ans = 0 ;
for(int i=0;i<n;++i){
int cur = 0 ;
while(h[i].size()>=2 && is[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:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d",&n);
~~~~~^~~~~~~~~
rima.cpp:38:14: 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 |
12160 KB |
Output is correct |
| 2 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 3 |
Correct |
12 ms |
12160 KB |
Output is correct |
| 4 |
Execution timed out |
1031 ms |
87696 KB |
Time limit exceeded |
| 5 |
Correct |
158 ms |
41080 KB |
Output is correct |
| 6 |
Incorrect |
42 ms |
18796 KB |
Output isn't correct |
| 7 |
Incorrect |
35 ms |
17008 KB |
Output isn't correct |
| 8 |
Incorrect |
33 ms |
17184 KB |
Output isn't correct |
| 9 |
Incorrect |
157 ms |
45260 KB |
Output isn't correct |
| 10 |
Incorrect |
32 ms |
17768 KB |
Output isn't correct |
