Input
Input file contains several test cases. Each of them consists of six lines. Each line describes one pallet
and contains two integer numbers w and h (1<w;h<10 000) | width and height of the pallet inmillimeters respectively.
Output
For each test case, print one output line. Write a single word `POSSIBLE' to the output file if it is possible to make a box
using six given pallets for its sides. Write a single word `IMPOSSIBLE' if it is not possible to do so.
SampleInput
1345 2584
2584 683
2584 1345
683 1345
683 1345
2584 683
1234 4567
1234 4567
4567 4321
4322 4567
4321 1234
4321 1234
SampleOutput
POSSIBLE
Input file contains several test cases. Each of them consists of six lines. Each line describes one pallet
and contains two integer numbers w and h (1<w;h<10 000) | width and height of the pallet inmillimeters respectively.
Output
For each test case, print one output line. Write a single word `POSSIBLE' to the output file if it is possible to make a box
using six given pallets for its sides. Write a single word `IMPOSSIBLE' if it is not possible to do so.
SampleInput
1345 2584
2584 683
2584 1345
683 1345
683 1345
2584 683
1234 4567
1234 4567
4567 4321
4322 4567
4321 1234
4321 1234
SampleOutput
POSSIBLE
IMPOSSIBLE
分析:水题,不用多想,读取数据,排序,比较数据即可。
#include <stdio.h>
#include <algorithm>
using namespace std;
struct box{
int x,y;
};
box b[6];
bool cmp(box a,box b)
{
if(a.x==b.x)return a.y<b.y;
return a.x<b.x;
}
int main()
{
while(~scanf("%d",&b[0].x))
{
scanf("%d",&b[0].y);
if(b[0].x>b[0].y)swap(b[0].x,b[0].y);
for(int i=1; i<6; i++)
{
scanf("%d%d",&b[i].x,&b[i].y);
if(b[i].x>b[i].y)swap(b[i].x,b[i].y);
}
sort(b,b+6,cmp);
int error = 0;
for(int i=0; i<3; i++)
{
if(b[i*2].x!=b[i*2+1].x || b[i*2].y!=b[i*2+1].y)
{
error = 1;
break;
}
}
if(!error && b[0].x==b[2].x && b[0].y==b[4].x && b[2].y==b[4].y)
printf("POSSIBLE\n");
else
printf("IMPOSSIBLE\n");
}
return 0;
}