备忘

备忘

lower_bound和unique返回的指针

int a[] = {1, 2, 3, 5, 5, 9, 10};

lower_bound(a, a+7, 1)-a;   //0
*a  //1

*(unique(a, a+7))   //10
unique(a, a+7)-a    //6

memset赋INF memset(a, 0x3f, sizeof(a));

For long long int %lld
For unsigned long long int %llu
For double input %lf
For double output %f

ONLINE_JUDGE宏

#ifndef ONLINE_JUDGE
freopen("testdata.in", "r", stdin);
#endif // ONLINE_JUDGE