結果用 long long。
#?include?<stdio.h>
#?include?<string.h>
#?include?<algorithm>
using?namespace?std;
#?define?B?1005
#?define?N?1000005
int?n,?m,?k,?a[B];
int?r[N],?x[N],?y[N];
bool?cmp(int?i,?int?j)
{
????????????????return?x[i]^x[j]???x[i]>x[j]?:?y[i]>y[j];
}
/********************************************************/
int?getsum(int?x)
{
????????????????int?ret?=?0;
????????????????while?(x?>?0)?ret?+=?a[x],?x?-=?x&(-x);
????????????????return?ret;
}
void?inc(int?x)
{
????????????????while?(x?<=?m)?++?a[x],?x?+=?x&(-x);
}
/********************************************************/
int?main()
{
????????????????int?ii,?T,?i,?xx;
????????????????long?long?int?ans;
????????????????scanf("%d",?&T);
????????????????for?(ii?=?1;?ii?<=?T;?++ii)
????????????????{
????????????????????????????????scanf("%d%d%d",?&n,?&m,?&k);
????????????????????????????????memset(a+1,?0,?sizeof(a[0])*m);
????????????????????????????????for?(i?=?0;?i?<?k;?++i)
????????????????????????????????????????????????r[i]?=?i,?scanf("%d%d",?&x[i],?&y[i]);
????????????????????????????????sort(r,?r+k,?cmp);
????????????????????????????????ans?=?0;
????????????????????????????????for?(i?=?0;?i?<?k;?++i)
????????????????????????????????????????????????ans?+=?getsum(y[r[i]]-1),?inc(y[r[i]]);
????????????????????????????????printf("Test?case?%d:?%lld\n",?ii,?ans);
????????????????}
????????????????return?0;
}
posted on 2012-09-02 13:53
yajunw 閱讀(214)
評論(0) 編輯 收藏 引用