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贴代码#include <stdio.h>
#include <string.h>
char data[124];
int paras[124];
bool inputData()
{
scanf("%s", &data);
return (strcmp(data, "0") != 0);
}
bool getValue(int values[])
{
int len = strlen(data);
int pl = 0;
for (int i = len - 1; i >= 0; -- i)
{
if (data[i] >= 'p' && data[i] <= 't')
{
paras[pl] = values[data[i] - 'p'];
++ pl;
}
else if (data[i] == 'K')
{
paras[pl - 2] = (paras[pl - 2] & paras[pl - 1]);
-- pl;
}
else if (data[i] == 'A')
{
paras[pl - 2] = (paras[pl - 2] | paras[pl - 1]);
-- pl;
}
else if (data[i] == 'N')
{
paras[pl - 1] = 1 - paras[pl - 1];
}
else if (data[i] == 'C')
{
paras[pl - 2] = ((paras[pl - 1] ^ 1) | paras[pl - 2]);
-- pl;
}
else if (data[i] == 'E')
{
paras[pl - 2] = 1 - (paras[pl - 1] ^ paras[pl - 2]);
-- pl;
}
}
return (paras[0] == 1);
}
void process()
{
bool ret = true;
int values[5];
for (int i = 0; i < 32; ++ i)
{
for (int j = 0; j < 5; ++ j)
{
values[j] = (i & (1 << j)) ? 1 : 0;
}
ret &= getValue(values);
if (!ret)
{
break;
}
}
if (ret)
{
printf("tautology\n");
}
else
{
printf("not\n");
}
}
int main()
{
while (inputData())
{
process();
}
return 0;
}
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