gctf2023/pwn/flipper/dist/userspace/tests/mult.c

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2023-11-24 18:11:34 +00:00
#include "../../common/include/kernel/syscall-definitions.h"
/* the result should be 1237619379 for size of 100 */
#define ARRAY_SIZE 100
#define POS(x,y) (x*ARRAY_SIZE+y)
typedef unsigned int uint32;
uint32 axa[ARRAY_SIZE][ARRAY_SIZE];
uint32 bxb[ARRAY_SIZE][ARRAY_SIZE];
uint32 cxc[ARRAY_SIZE][ARRAY_SIZE];
uint32 prime = 5000011;
uint32 rand = 31337;
uint32 expos = 1;
uint32 sum = 0;
uint32 getRandom()
{
expos = expos * prime;
rand = rand + expos;
rand = rand % 100003;
return rand;
}
int main(int argc, char** argv)
{
int x, y, a = 0;
for (x = 0; x < ARRAY_SIZE; ++x)
{
for (y = 0; y < ARRAY_SIZE; ++y)
{
axa[x][y]= getRandom();
bxb[x][y] = getRandom();
}
}
for (x=0;x<ARRAY_SIZE;++x)
for (y=0;y<ARRAY_SIZE;++y)
{
cxc[x][y]=0;
for (a=0;a<ARRAY_SIZE;++a)
cxc[x][y]+=axa[x][a]*bxb[a][y];
}
for (x=0;x<ARRAY_SIZE;++x)
for (y=0;y<ARRAY_SIZE;++y)
sum += cxc[x][y];
// printf("Result is %d",sum);
return sum;
}