Submission #3155737

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#include <bits/stdc++.h>
using namespace std;

#define NDEBUG
#ifdef DEBUG
#include "../cout11.h"
#undef NDEBUG
#endif
#include <cassert>

typedef long long ll;
typedef long double Double;
typedef unsigned long long ull;
typedef pair<int,int> ii;
typedef pair<ll,ll> llll;
typedef pair<double,double> dd;

typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<long double> vD;

#define sz(a)  int((a).size())
#define pb  push_back
#define FOR(var,from,to) for(int var=(from);var<=(to);++var)
#define rep(var,n)  for(int var=0;var<(n);++var)
#define rep1(var,n)  for(int var=1;var<=(n);++var)
#define repC2(vari,varj,n)  for(int vari=0;vari<(n)-1;++vari)for(int varj=vari+1;varj<(n);++varj)
#define ALL(c)  (c).begin(),(c).end()
#define RALL(c)  (c).rbegin(),(c).rend()
#define tr(i,c)  for(auto i=(c).begin(); i!=(c).end(); ++i)
#define found(s,e)  ((s).find(e)!=(s).end())
#define mset(arr,val)  memset(arr,val,sizeof(arr))
#define mid(x,y) ((x)+((y)-(x))/2)
#define IN(x,a,b) ((a)<=(x)&&(x)<=(b))
#define cons make_pair


bool solve(int N, vector<string>& w) {
    set<string> deja;
    deja.insert(w[0]);

    for (int i=1; i<N; ++i) {
        if (found(deja, w[i])) return false;
        if (w[i-1].back() != w[i][0]) return false;
        deja.insert(w[i]);
    }
    return true;
}

int main() {
    int N; cin >> N;
    vector<string> w(N);
    rep(i,N) cin >> w[i];
    cout << (solve(N,w) ? "Yes":"No") << endl;
    return 0;
}

Submission Info

Submission Time
Task B - Shiritori
User naoya_t
Language C++14 (GCC 5.4.1)
Score 200
Code Size 1651 Byte
Status
Exec Time 1 ms
Memory 256 KB

Test Cases

Set Name Score / Max Score Test Cases
All 200 / 200 max_1, max_2, max_3, max_4, min_1, no1_1, no1_2, no2_1, no2_2, random_1, random_2, sample_01, sample_02, sample_03, sample_04, yes_1, yes_2
Sample 0 / 0 sample_01, sample_02, sample_03, sample_04
Case Name Status Exec Time Memory
max_1 1 ms 256 KB
max_2 1 ms 256 KB
max_3 1 ms 256 KB
max_4 1 ms 256 KB
min_1 1 ms 256 KB
no1_1 1 ms 256 KB
no1_2 1 ms 256 KB
no2_1 1 ms 256 KB
no2_2 1 ms 256 KB
random_1 1 ms 256 KB
random_2 1 ms 256 KB
sample_01 1 ms 256 KB
sample_02 1 ms 256 KB
sample_03 1 ms 256 KB
sample_04 1 ms 256 KB
yes_1 1 ms 256 KB
yes_2 1 ms 256 KB