Submission #182408

#	Time	Username	Problem	Language	Result	Execution time	Memory
182408		awlintqaa	Rima (COCI17_rima)	C++14	42 / 140	86 ms	75512 KiB

rima

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
using namespace std;
#define sqr 500
#define mid (l+r)/2
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define ins insert
#define era erase
#define C continue
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define mset multiset
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pi;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pi> vpi;
typedef vector<pll> vpll;
const ll mod=1000000007;//998244353;
const ll inf=1e18*4;
const ld pai=acos(-1);
int n;
string s[20];
int dp[(1<<19)+9][18];
int check(int x,int y){
        if(x==0)x=y;
        string a=s[x];
        string b=s[y];
        if(a.size()-b.size()>1)return 0;
        reverse(a.begin(),a.end());
        reverse(b.begin(),b.end());
        for(int i=0;i<b.size()-((int)a.size()==(int)b.size());i++){
                if(a[i]!=b[i])return 0;
        }
        return 1;
}
int bt(int mask,int last){
        int N=__builtin_popcount(mask);
        if(N==n)return 0;
        int &ret=dp[mask][last];
        if(ret!=-1)return ret;
        ret=0;
        for(int i=1;i<=n;i++){
                if((mask&(1<<i)))C;
                if(!check(last,i))C;
                ret=max(ret,bt((mask|(1<<i)),i)+1);
        }
        return ret;
}
int main(){
        mem(dp,-1);
        cin>>n;
        for(int i=1;i<=n;i++)cin>>s[i];
        cout<<bt(0,0)<<endl;
}

Compilation message (stderr)

rima.cpp: In function 'int check(int, int)':
rima.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i=0;i<b.size()-((int)a.size()==(int)b.size());i++){
                     ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 42 / 140