Submission #11853

#	Time	Username	Problem	Language	Result	Execution time	Memory
11853		gs14004	백신 (KOI13_vaccine)	C++98	2.64 / 24	28 ms	4524 KiB

vaccine

#include <cstdio>
#include <algorithm>
#include <set>
using namespace std;

set<long long> hash_virus[101];

long long chash[1005];
int n,k;

int fnd(long long x){
    for (int i=1; i<n; i++) {
        if(hash_virus[i].find(x) == hash_virus[i].end()) return 0;
    }
    return 1;
}

int main(){
    scanf("%d %d",&n,&k);
    chash[0] = 1;
    for (int i=1; i<=k; i++) {
        chash[i] = chash[i-1] * 10000;
    }
    for (int i=0; i<n; i++) {
        int m, a[1005] ={};
        scanf("%d",&m);
        for (int j=0; j<m; j++) {
            scanf("%d",&a[j]);
        }
        long long ch = 0;
        for (int j=0; j<m; j++) {
            ch *= 10000;
            ch += a[j];
            if(j >= k) ch -= a[j-k] * chash[k];
            if(j+1 >= k) hash_virus[i].insert(ch);
        }
        reverse(a,a+m);
        ch = 0;
        for (int j=0; j<m; j++) {
            ch *= 10000;
            ch += a[j];
            if(j >= k) ch -= a[j-k] * chash[k];
            if(j+1 >= k) hash_virus[i].insert(ch);
        }
    }
    set<long long> ::iterator it = hash_virus[0].begin();
    while (it != hash_virus[0].end()) {
        if(fnd(*it)){
            puts("YES");
            return 0;
        }
        it++;
    }
    puts("NO");
}

• Subtask 1: 2.64 / 2.64
• Subtask 2: 0 / 3.12
• Subtask 3: 0 / 3.6
• Subtask 4: 0 / 4.32
• Subtask 5: 0 / 4.8
• Subtask 6: 0 / 5.52