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January 4, 2016 13:49
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#include <cstdio> | |
#include <algorithm> | |
using namespace std; | |
int main() | |
{ | |
// freopen("input.txt","rt",stdin); | |
int Case,N,P[1001],i; | |
scanf("%d",&Case); | |
while (Case--) | |
{ | |
scanf("%d",&N); | |
for (i=0; i<N; i++) scanf("%d",&P[i]); | |
sort (P,P+N); | |
int sum=0; | |
for (i=N-1; i>=3; i-=2){ //三個人以上 | |
int A = P[1]+P[0]+P[i]+P[1]; | |
int B = P[i]+P[0]+P[i-1]+P[0]; | |
if (A<B) sum += A; | |
else sum += B; | |
} | |
if (i == 2) sum += (P[1]+P[0]+P[2]); //三個人 | |
else if (i == 1) sum += P[1]; //兩個人 | |
else if (i == 0) sum += P[0]; //一個人 | |
printf("%d\n",sum); | |
for (i=N-1; i>=3; i-=2){ | |
int A = P[1]+P[0]+P[i]+P[1]; | |
int B = P[i]+P[0]+P[i-1]+P[0]; | |
if (A<B) printf("%d %d\n%d\n%d %d\n%d\n",P[0],P[1],P[0],P[i-1],P[i],P[1]); | |
else printf("%d %d\n%d\n%d %d\n%d\n",P[0],P[i-1],P[0],P[0],P[i],P[0]); | |
} | |
if (i == 2) printf("%d %d\n%d\n%d %d\n",P[0],P[1],P[0],P[0],P[2]); | |
else if (i == 1) printf("%d %d\n",P[0],P[1]); | |
else if (i == 0) printf("%d\n",P[0]); | |
if (Case) printf("\n"); | |
} | |
return 0; | |
} |
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