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Help~~~~~~~~到底是哪里错了啊??????#include<stdio.h>
void main()
{
int i,a[12],t=0,num1=1,num2,flag=1;
for(i=0;i<12;i++)scanf("%d",&a[i]);
for(i=1;i<12;i++)
{
if(a[i]==a[0])num1++;
else t=a[i];
}
if(num1%4)flag--;
for(i=1,num2=0;i<12&&flag;i++)
{
if(a[i]==t)num2++;
}
if(num2%4)flag--;
if(num1==8)
{
for(i=0;i<11&&flag;i+=2)
{
if(a[i]==t&&a[i+1]==t){flag--;break;}
}
}
if(num2==8)
{
for(i=0;i<11&&flag;i+=2)
{
if(a[i]==a[0]&&a[i+1]==a[0]){flag--;break;}
}
}
if(num1==4&&num2==4)
{
for(i=0;i<11&&flag;i+=2)
{
if(a[i]==a[i+1]){flag--;break;}
}
}
if(flag)printf("POSSIBLE\n");
else printf("IMPOSSIBLE\n");
}
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