N = 3
M = 3

attempts = [(1,1), (2,2), (1,1)]

seats = [[0]*M for _ in range(N)]

for r, c in attempts:
    r_idx = r - 1
    c_idx = c - 1
    if seats[r_idx][c_idx] == 0:
        seats[r_idx][c_idx] = 1

total_reserved = sum(sum(row) for row in seats)
print("총 예약 좌석:", total_reserved)