#include <cstdio>
#include <algorithm>
typedef long long ll;
struct DisjSet{
int par[100010];
int sz[100010];
DisjSet(int n){
for(int i = 1; i <= n; i++) par[i] = i, sz[i] = 1;
}
int Find(int a){
if(par[a] == a) return a;
return par[a] = Find(par[a]);
}
void Union(int a, int b){
sz[Find(b)] += sz[Find(a)];
par[Find(a)] = Find(b);
}
};
ll ans1, ans2;
int n, c;
ll a, b;
DisjSet *DS;
ll f1(ll x){
return x * (x - 1) / 2;
}
ll f2(int x){
return x * (x - 1) * (x + 1) / 6;
}
int main(){
scanf("%d", &n);
DS = new DisjSet(n);
for(int i = 0; i < n - 1; i++){
scanf("%d", &c);
a = DS -> sz[DS -> Find(c)];
b = DS -> sz[DS -> Find(c + 1)];
ans1 -= f1(a) + f1(b);
ans2 -= f2(a) + f2(b);
DS -> Union(c, c + 1);
ans1 += f1(a + b);
ans2 += f2(a + b);
printf("%lld %lld\n", ans1, ans2);
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
39 ms |
1992 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |