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Maximum triangle path sum: Difference between revisions
C solution addition.
(C solution addition.) |
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<pre>
+1320
</pre>
=={{header|C}}==
<lang C>
#include <stdio.h>
#include <math.h>
#define max(x,y) ((x) > (y) ? (x) : (y))
int tri[] = {
55,
94, 48,
95, 30, 96,
77, 71, 26, 67,
97, 13, 76, 38, 45,
7, 36, 79, 16, 37, 68,
48, 7, 9, 18, 70, 26, 6,
18, 72, 79, 46, 59, 79, 29, 90,
20, 76, 87, 11, 32, 7, 7, 49, 18,
27, 83, 58, 35, 71, 11, 25, 57, 29, 85,
14, 64, 36, 96, 27, 11, 58, 56, 92, 18, 55,
2, 90, 3, 60, 48, 49, 41, 46, 33, 36, 47, 23,
92, 50, 48, 2, 36, 59, 42, 79, 72, 20, 82, 77, 42,
56, 78, 38, 80, 39, 75, 2, 71, 66, 66, 1, 3, 55, 72,
44, 25, 67, 84, 71, 67, 11, 61, 40, 57, 58, 89, 40, 56, 36,
85, 32, 25, 85, 57, 48, 84, 35, 47, 62, 17, 1, 1, 99, 89, 52,
6, 71, 28, 75, 94, 48, 37, 10, 23, 51, 6, 48, 53, 18, 74, 98, 15,
27, 2, 92, 23, 8, 71, 76, 84, 15, 52, 92, 63, 81, 10, 44, 10, 69, 93
};
int main(void)
{
const int len = sizeof(tri) / sizeof(tri[0]);
const int base = (sqrt(8*len + 1) - 1) / 2;
int step = base - 1;
int stepc = 0;
int i;
for (i = len - base - 1; i >= 0; --i) {
tri[i] += max(tri[i + step], tri[i + step + 1]);
if (++stepc == step) {
step--;
stepc = 0;
}
}
printf("%d\n", tri[0]);
return 0;
}
</lang>
{{out}}
<pre>
1320
</pre>
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