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Problem_011.c
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Problem_011.c
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#include <stdio.h>
int array[20][20] = {
{8,2,22,97,38,15,0,40,0,75,4,5,7,78,52,12,50,77,91,8},
{49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,4,56,62,0},
{81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,3,49,13,36,65},
{52,70,95,23,4,60,11,42,69,24,68,56,1,32,56,71,37,2,36,91},
{22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80},
{24,47,32,60,99,3,45,2,44,75,33,53,78,36,84,20,35,17,12,50},
{32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70},
{67,26,20,68,2,62,12,20,95,63,94,39,63,8,40,91,66,49,94,21},
{24,55,58,5,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72},
{21,36,23,9,75,0,76,44,20,45,35,14,0,61,33,97,34,31,33,95},
{78,17,53,28,22,75,31,67,15,94,03,80,4,62,16,14,9,53,56,92},
{16,39,5,42,96,35,31,47,55,58,88,24,0,17,54,24,36,29,85,57},
{86,56,0,48,35,71,89,07,05,44,44,37,44,60,21,58,51,54,17,58},
{19,80,81,68,5,94,47,69,28,73,92,13,86,52,17,77,4,89,55,40},
{4,52,8,83,97,35,99,16,7,97,57,32,16,26,26,79,33,27,98,66},
{88,36,68,87,57,62,20,72,3,46,33,67,46,55,12,32,63,93,53,69},
{4,42,16,73,38,25,39,11,24,94,72,18,8,46,29,32,40,62,76,36},
{20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,4,36,16},
{20,73,35,29,78,31,90,1,74,31,49,71,48,86,81,16,23,57,5,54},
{1,70,54,71,83,51,54,69,16,92,33,48,61,43,52,1,89,19,67,48}
};
int main(void)
{
int sum = 1; //o parodikos ipologismos pou sigrinete me to megisto.
int max = 0; //megisto
int counter;
int lines;
int rows;
for(lines = 0; lines < 20; lines++)
{
for(rows = 0; rows < 16; rows++)
{
sum = 1; //because we want to seperate our calculations between groups of 4 numbers.
for(counter = 0; counter <= 3; counter++)
{
sum = sum * array[lines][rows + counter];
}
if(sum > max)
{
max = sum;
}
}
}
for(rows = 0; rows < 20; rows++)
{
for(lines = 0; lines < 16; lines++)
{
sum = 1;
for(counter = 0; counter <= 3; counter++)
{
sum = sum * array[lines + counter][rows];
}
if(sum > max)
{
max = sum;
}
}
}
for(lines = 0; lines < 16; lines++)
{
for(rows = 0; rows < 16; rows++)
{
sum = 1;
for(counter = 0; counter <= 3; counter++)
{
sum = sum * array[lines + counter][rows + counter];
}
if(sum > max)
{
max = sum;
}
}
}
for(lines = 0; lines < 16; lines++)
{
for(rows = 3; rows < 20; rows++)
{
sum = 1;
for(counter = 0; counter <= 3; counter++)
{
sum = sum * array[lines + counter][rows - counter];
}
if(sum > max)
{
max = sum;
}
}
}
printf("MAX: %d\n", max);
}