-
Notifications
You must be signed in to change notification settings - Fork 0
/
prob11.cpp
117 lines (99 loc) · 4.1 KB
/
prob11.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
#include <iostream>
#include <cmath>
#include <cstdlib>
#include <vector>
#include <cstdint>
#include <cassert>
#define NUM_ARRAYS 20
#define ARRAY_LENGTH 20
#define MULT_LENGTH 4
#define ARRAY0 "08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08"
#define ARRAY1 "49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00"
#define ARRAY2 "81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65"
#define ARRAY3 "52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91"
#define ARRAY4 "22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80"
#define ARRAY5 "24 47 32 60 99 03 45 02 44 75 33 53 78 36 84 20 35 17 12 50"
#define ARRAY6 "32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70"
#define ARRAY7 "67 26 20 68 02 62 12 20 95 63 94 39 63 08 40 91 66 49 94 21"
#define ARRAY8 "24 55 58 05 66 73 99 26 97 17 78 78 96 83 14 88 34 89 63 72"
#define ARRAY9 "21 36 23 09 75 00 76 44 20 45 35 14 00 61 33 97 34 31 33 95"
#define ARRAY10 "78 17 53 28 22 75 31 67 15 94 03 80 04 62 16 14 09 53 56 92"
#define ARRAY11 "16 39 05 42 96 35 31 47 55 58 88 24 00 17 54 24 36 29 85 57"
#define ARRAY12 "86 56 00 48 35 71 89 07 05 44 44 37 44 60 21 58 51 54 17 58"
#define ARRAY13 "19 80 81 68 05 94 47 69 28 73 92 13 86 52 17 77 04 89 55 40"
#define ARRAY14 "04 52 08 83 97 35 99 16 07 97 57 32 16 26 26 79 33 27 98 66"
#define ARRAY15 "88 36 68 87 57 62 20 72 03 46 33 67 46 55 12 32 63 93 53 69"
#define ARRAY16 "04 42 16 73 38 25 39 11 24 94 72 18 08 46 29 32 40 62 76 36"
#define ARRAY17 "20 69 36 41 72 30 23 88 34 62 99 69 82 67 59 85 74 04 36 16"
#define ARRAY18 "20 73 35 29 78 31 90 01 74 31 49 71 48 86 81 16 23 57 05 54"
#define ARRAY19 "01 70 54 71 83 51 54 69 16 92 33 48 61 43 52 01 89 19 67 48"
int string_to_int(std::string str, int start, int end);
int main(int argc, char *argv[])
{
// convert input strings into 2-d array of ints
std::string inputs[NUM_ARRAYS] = {ARRAY0, ARRAY1, ARRAY2, ARRAY3, ARRAY4,
ARRAY5, ARRAY6, ARRAY7, ARRAY8, ARRAY9, ARRAY10, ARRAY11, ARRAY12,
ARRAY13, ARRAY14, ARRAY15, ARRAY16, ARRAY17, ARRAY18, ARRAY19};
int int_array[NUM_ARRAYS][ARRAY_LENGTH];
for (int j = 0; j < NUM_ARRAYS; j++)
for (int k = 0; k < ARRAY_LENGTH; k++)
{
int start = k * 3;
int_array[j][k] = string_to_int(inputs[j], start, start + 1);
}
uint64_t largest = 0;
// check rows
for (int j = 0; j < NUM_ARRAYS; j++)
for (int k = 0; k < ARRAY_LENGTH - MULT_LENGTH - 1; k++)
{
uint64_t prod = 1;
for (int f = 0; f < MULT_LENGTH; f++)
prod *= int_array[j][k + f];
if (prod > largest)
largest = prod;
}
// check columns
for (int k = 0; k < ARRAY_LENGTH; k++)
for (int j = 0; j < NUM_ARRAYS - MULT_LENGTH - 1; j++)
{
uint64_t prod = 1;
for (int f = 0; f < MULT_LENGTH; f++)
prod *= int_array[j + f][k];
if (prod > largest)
largest = prod;
}
// check upward diagonal
for (int j = MULT_LENGTH - 1; j < NUM_ARRAYS; j++)
for (int k = MULT_LENGTH - 1; k < ARRAY_LENGTH; k++)
{
uint64_t prod = 1;
for (int f = 0; f < MULT_LENGTH; f++)
prod *= int_array[j - f][k + f];
if (prod > largest)
largest = prod;
}
// check downward diagonal
for (int j = 0; j < NUM_ARRAYS - MULT_LENGTH - 1; j++)
for (int k = 0; k < ARRAY_LENGTH - MULT_LENGTH - 1; k++)
{
uint64_t prod = 1;
for (int f = 0; f < MULT_LENGTH; f++)
prod *= int_array[j + f][k + f];
if (prod > largest)
largest = prod;
}
std::cout << largest << std::endl;
return 0;
}
int string_to_int(std::string str, int start, int end)
{
int len = (end - start) + 1;
int temp[len];
int sum = 0;
for (int k = 0; k < len; k++)
{
temp[k] = str[start + k] - 48;
sum += (temp[k] * pow(10, (len - 1) - k));
}
return sum;
}