poj 1656 Counting Black

Counting Black

Time Limit: 1000MS
Memory Limit: 10000K

Total Submissions: 8396
Accepted: 5398

Description

There is a board with 100 * 100 grids as shown below. The left-top gird is denoted as (1, 1) and the right-bottom grid is (100, 100).



We may apply three commands to the board:

1.	WHITE  x, y, L     // Paint a white square on the board,

// the square is defined by left-top grid (x, y)

// and right-bottom grid (x+L-1, y+L-1)

2.	BLACK  x, y, L     // Paint a black square on the board,

// the square is defined by left-top grid (x, y)

// and right-bottom grid (x+L-1, y+L-1)

3.	TEST     x, y, L    // Ask for the number of black grids

// in the square (x, y)- (x+L-1, y+L-1)

In the beginning, all the grids on the board are white. We apply a series of commands to the board. Your task is to write a program to give the numbers of black grids within a required region when a TEST command is applied.

Input

The first line of the input is an integer t (1 <= t <= 100), representing the number of commands. In each of the following lines, there is a command. Assume all the commands are legal which means that they won't try to paint/test the grids outside the board.

Output

For each TEST command, print a line with the number of black grids in the required region.

Sample Input

5
BLACK 1 1 2
BLACK 2 2 2
TEST 1 1 3
WHITE 2 1 1
TEST 1 1 3

Sample Output

7
6

1: #include<iostream>

2: using namespace std;

3: int main()

4: {

5: 	char grid[102][102];

6:

7: 	char command[10];

8: 	int n;

9: 	int x,y,l;

10: 	int i,j;

11: 	int sum;

12: 	for(i=0;i<102;i++)

13: 	{

14: 		for(j=0;j<102;j++)

15: 		{

16: 			grid[i][j]='w';

17: 		}

18: 	}

19: 	cin>>n;

20: 	while(n--)

21: 	{

22: 		cin>>command;

23: 		if(strcmp(command,"BLACK")==0)

24: 		{

25: 			cin>>x>>y>>l;

26: 			for(i=x;i<=x+l-1;i++)

27: 			{

28: 				for(j=y;j<=y+l-1;j++)

29: 					grid[i][j]='b';

30: 			}

31: 		}

32: 		else if(strcmp(command,"WHITE")==0)

33: 		{

34: 			cin>>x>>y>>l;

35: 			for(i=x;i<=x+l-1;i++)

36: 			{

37: 				for(j=y;j<=y+l-1;j++)

38: 					grid[i][j]='w';

39: 			}

40: 		}

41: 		else if(strcmp(command,"TEST")==0)

42: 		{

43: 			cin>>x>>y>>l;

44: 			sum=0;

45: 			for(i=x;i<=x+l-1;i++)

46: 			{

47: 				for(j=y;j<=y+l-1;j++)

48: 				{

49: 					if(grid[i][j]=='b')

50: 						sum++;

51: 				}

52: 			}

53: 			cout<<sum<<endl;

54: 		}

55: 	}

56: 	return 0;

57: }

58: