def main():
    import sys
    input = sys.stdin.read().split()
    idx = 0
    H = int(input[idx])
    idx += 1
    W = int(input[idx])
    idx += 1
    
    A = [[0] * (W + 1) for _ in range(H + 1)]
    for i in range(1, H + 1):
        for j in range(1, W + 1):
            A[i][j] = int(input[idx])
            idx += 1
    
    INF = -float('inf')
    dp0 = [[INF] * (W + 1) for _ in range(H + 1)]
    dp1 = [[INF] * (W + 1) for _ in range(H + 1)]
    dp0[1][1] = A[1][1]
    
    for i in range(1, H + 1):
        for j in range(1, W + 1):
            if i == 1 and j == 1:
                continue
            
            max0 = INF
            if i > 1:
                prev = dp0[i-1][j]
                if prev > A[i][j]:
                    current = prev + A[i][j]
                    if current > max0:
                        max0 = current
            if j > 1:
                prev = dp0[i][j-1]
                if prev > A[i][j]:
                    current = prev + A[i][j]
                    if current > max0:
                        max0 = current
            dp0[i][j] = max0
            
            max1 = INF
            if i > 1:
                prev = dp0[i-1][j]
                if prev != INF and prev <= A[i][j]:
                    if prev > max1:
                        max1 = prev
            if j > 1:
                prev = dp0[i][j-1]
                if prev != INF and prev <= A[i][j]:
                    if prev > max1:
                        max1 = prev
            if i > 1:
                prev = dp1[i-1][j]
                if prev > A[i][j]:
                    current = prev + A[i][j]
                    if current > max1:
                        max1 = current
            if j > 1:
                prev = dp1[i][j-1]
                if prev > A[i][j]:
                    current = prev + A[i][j]
                    if current > max1:
                        max1 = current
            dp1[i][j] = max1
    
    final_attack = A[H][W]
    if dp0[H][W] > final_attack or dp1[H][W] > final_attack:
        print("Yes")
    else:
        print("No")

if __name__ == "__main__":
    main()