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B_EnlargedCheckerBoard.java
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B_EnlargedCheckerBoard.java
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import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main extends FastInput {
private void solution() throws Exception {
int n = nextInt();
int a = nextInt();
int b = nextInt();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < n; i++) {
boolean isWhite = (i&1)==0;
for (int x = 0; x < a; x++) {
for (int j = 0; j < n; j++) {
boolean swt = (j&1)==1;
for (int y = 0; y < b; y++) {
sb.append(isWhite^swt ? '.':"#");
}
}
sb.append('\n');
}
}
System.out.print(sb);
}
private static BufferedReader br;
public static void main(String[] args) throws Exception {
initFI();
// initSI();
new Main().solution();
}
}
class FastInput {
private static final int DEFAULT_BUFFER_SIZE = 1 << 16;
private static final int MAX_CHAR_LEN_FOR_NEXT_LINE = 64;
private static DataInputStream inputStream;
private static byte[] buffer;
private static int curIdx, maxIdx;
private static BufferedReader br;
protected static void initFI() {
inputStream = new DataInputStream(System.in);
buffer = new byte[DEFAULT_BUFFER_SIZE];
curIdx = maxIdx = 0;
}
protected static void initSI() {
br = new BufferedReader(new InputStreamReader(System.in));
}
protected static String nextLine() throws IOException {
byte[] buf = new byte[MAX_CHAR_LEN_FOR_NEXT_LINE];
int cnt = 0, c;
while ((c = read()) != -1) {
if (c == '\n') {
if (cnt != 0) break;
continue;
}
buf[cnt++] = (byte)c;
}
return new String(buf, 0, cnt);
}
protected static int nextInt() throws IOException {
int ret = 0;
byte c = read();
while (c <= ' ') c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg) return -ret;
return ret;
}
protected static long nextLong() throws IOException {
long ret = 0;
byte c = read();
while (c <= ' ') c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg) return -ret;
return ret;
}
protected static double nextDouble() throws IOException {
double ret = 0, div = 1;
byte c = read();
while (c <= ' ') c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (c == '.') while ((c = read()) >= '0' && c <= '9') ret += (c - '0') / (div *= 10);
if (neg) return -ret;
return ret;
}
protected static char nextChar() throws IOException {
byte c = read();
while (c <= ' ') c = read();
return (char)c;
}
protected static byte read() throws IOException {
if (curIdx == maxIdx) {
maxIdx = inputStream.read(buffer, curIdx = 0, DEFAULT_BUFFER_SIZE);
if (maxIdx == -1) buffer[0] = -1;
}
return buffer[curIdx++];
}
}