Submission #229558

#	Time	Username	Problem	Language	Result	Execution time	Memory
229558		Uzumaki_Naturoo	Rima (COCI17_rima)	C++14	56 / 140	416 ms	123000 KiB

rima

/// 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 = 3e6+5 ;

int n ,m ,sz ,en[N] ;
vector<pair<int,int>> to[N] ;
char str[N] ;
void insert_str(){
    int cur = 0 ;
    for(int i=0;i<m;++i){
        int cc = str[i] - 'a' ;
        int j = 0 ;
        while(j<to[cur].size() && to[cur][j].first!=cc) ++j ;
        if(j==to[cur].size()) to[cur].push_back({cc ,++sz}) ;
        cur = to[cur][j].second ;
    }
    ++en[cur] ;
}
int mem[N][2] ;
int dfs(int cur,bool is){
    int&ret = mem[cur][is];
    if(~ret) return ret;
    ret = 0 ;
    if(!is) for(auto i:to[cur]) ret = max(ret ,dfs(i.second,0)) ;

    int here = 0 ;
    for(auto i:to[cur]) here += en[i.second] ;
    if(!here) return ret ;

    ret = max(ret,here) ;
    for(auto i:to[cur]) if(en[i.second]) ret = max(ret ,here + dfs(i.second,1)) ;
    return ret ;
}
int main(){
    scanf("%d",&n);
    for(int i=0;i<n;++i){
        scanf("%s",str);
        m = strlen(str) ;
        reverse(str,str+m);
        insert_str();
    }
    memset(mem,-1,sizeof mem);
    printf("%d",dfs(0,0));
    return 0;
}

Compilation message (stderr)

rima.cpp: In function 'void insert_str()':
rima.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(j<to[cur].size() && to[cur][j].first!=cc) ++j ;
               ~^~~~~~~~~~~~~~~
rima.cpp:20:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(j==to[cur].size()) to[cur].push_back({cc ,++sz}) ;
            ~^~~~~~~~~~~~~~~~
rima.cpp: In function 'int main()':
rima.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
rima.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",str);
         ~~~~~^~~~~~~~~~

• Subtask 1: 56 / 140