Submission #4280962


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import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.stream.IntStream;
import java.util.Arrays;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.Reader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        MyInput in = new MyInput(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        BFoodsLovedByEveryone solver = new BFoodsLovedByEveryone();
        solver.solve(1, in, out);
        out.close();
    }

    static class BFoodsLovedByEveryone {
        public void solve(int testNumber, MyInput in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int[] food = new int[m];
            for (int i = 0; i < n; i++) {
                int k = in.nextInt();
                for (int a : in.nextIntArray(k)) {
                    food[a - 1]++;
                }
            }
            out.println(Arrays.stream(food).filter(x -> x == n).count());
        }

    }

    static class MyInput {
        private final BufferedReader in;
        private static int pos;
        private static int readLen;
        private static final char[] buffer = new char[1024 * 8];
        private static char[] str = new char[500 * 8 * 2];
        private static boolean[] isDigit = new boolean[256];
        private static boolean[] isSpace = new boolean[256];
        private static boolean[] isLineSep = new boolean[256];

        static {
            for (int i = 0; i < 10; i++) {
                isDigit['0' + i] = true;
            }
            isDigit['-'] = true;
            isSpace[' '] = isSpace['\r'] = isSpace['\n'] = isSpace['\t'] = true;
            isLineSep['\r'] = isLineSep['\n'] = true;
        }

        public MyInput(InputStream is) {
            in = new BufferedReader(new InputStreamReader(is));
        }

        public int read() {
            if (pos >= readLen) {
                pos = 0;
                try {
                    readLen = in.read(buffer);
                } catch (IOException e) {
                    throw new RuntimeException();
                }
                if (readLen <= 0) {
                    throw new MyInput.EndOfFileRuntimeException();
                }
            }
            return buffer[pos++];
        }

        public int nextInt() {
            int len = 0;
            str[len++] = nextChar();
            len = reads(len, isSpace);
            int i = 0;
            int ret = 0;
            if (str[0] == '-') {
                i = 1;
            }
            for (; i < len; i++) ret = ret * 10 + str[i] - '0';
            if (str[0] == '-') {
                ret = -ret;
            }
            return ret;
        }

        public char nextChar() {
            while (true) {
                final int c = read();
                if (!isSpace[c]) {
                    return (char) c;
                }
            }
        }

        int reads(int len, boolean[] accept) {
            try {
                while (true) {
                    final int c = read();
                    if (accept[c]) {
                        break;
                    }
                    if (str.length == len) {
                        char[] rep = new char[str.length * 3 / 2];
                        System.arraycopy(str, 0, rep, 0, str.length);
                        str = rep;
                    }
                    str[len++] = (char) c;
                }
            } catch (MyInput.EndOfFileRuntimeException e) {
            }
            return len;
        }

        public int[] nextIntArray(final int n) {
            final int[] res = new int[n];
            for (int i = 0; i < n; i++) {
                res[i] = nextInt();
            }
            return res;
        }

        static class EndOfFileRuntimeException extends RuntimeException {
        }

    }
}

Submission Info

Submission Time
Task B - Foods Loved by Everyone
User tanzaku
Language Java8 (OpenJDK 1.8.0)
Score 200
Code Size 4318 Byte
Status AC
Exec Time 254 ms
Memory 28244 KB

Judge Result

Set Name All Sample
Score / Max Score 200 / 200 0 / 0
Status
AC × 15
AC × 3
Set Name Test Cases
All 0_random_1, 0_random_2, 1_max_1, 1_max_2, 2_nmin_1, 3_mmin_1, 4_corner_1, 4_corner_2, 4_corner_3, 5_hand_1, 5_hand_2, 5_hand_3, sample_01, sample_02, sample_03
Sample sample_01, sample_02, sample_03
Case Name Status Exec Time Memory
0_random_1 AC 254 ms 25044 KB
0_random_2 AC 160 ms 25680 KB
1_max_1 AC 160 ms 26068 KB
1_max_2 AC 157 ms 26580 KB
2_nmin_1 AC 165 ms 28244 KB
3_mmin_1 AC 159 ms 26068 KB
4_corner_1 AC 202 ms 24268 KB
4_corner_2 AC 151 ms 27476 KB
4_corner_3 AC 167 ms 26068 KB
5_hand_1 AC 170 ms 25684 KB
5_hand_2 AC 156 ms 24276 KB
5_hand_3 AC 155 ms 26580 KB
sample_01 AC 173 ms 23884 KB
sample_02 AC 157 ms 26324 KB
sample_03 AC 157 ms 25808 KB