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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#24672 | #1877. Matryoshka Dolls | zzy0922 | WA | 24ms | 17216kb | C++ | 2.6kb | 2022-04-02 08:16:02 | 2022-04-30 06:26:30 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define getchar() (p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 1<<21, stdin), p1 == p2) ? EOF : *p1++)
char buf[1 << 21],*p1 = buf,*p2 = buf;
inline int read()
{
char c = getchar();
int x = 0;
bool f = 0;
for(;!isdigit(c); c = getchar()) f ^= !(c ^ 45);
for(;isdigit(c); c = getchar()) x = (x << 1) + (x << 3) + (c ^ 48);
if (f) x = -x;
return x;
}
int n, m, a[500005], b[500005], pos[500005];
long long anslist[500005];
int len;
struct query{
int l, r, idx;
bool operator<(query a) {
if (l / len == a.l / len) return r > a.r;
else return l / len < a.l / len;
}
}q[500005];
struct node {
int val, next, prev;
}lis[500005];
#define head lis[0]
#define tail lis[n + 1]
long long ans, tmp, now;
void del(int p, long long& x) {
if (lis[p].prev == 0) x -= abs(p - lis[p].next);
else if (lis[p].next == n + 1) x -= abs(p - lis[p].prev);
else if (lis[p].prev == 0 && lis[p].next == n + 1) x = 0;
else x = x - abs(p - lis[p].prev) - abs(p - lis[p].next) + abs(lis[p].next - lis[p].prev);
lis[lis[p].prev].next = lis[p].next;
lis[lis[p].next].prev = lis[p].prev;
}
void rcv(int p) {
lis[lis[p].prev].next = p;
lis[lis[p].next].prev = p;
}
int main() {
scanf("%d%d", &n, &m);
len = sqrt(n);
for (int i = 1; i <= n; i++)
scanf("%d", &a[i]);
for (int i = 1; i <= n; i++)
lis[i].val = a[i];
for (int i = 1; i <= n; i++)
pos[a[i]] = i;
memcpy(b, a, sizeof a);
sort(b + 1, b + n + 1);
for (int i = 1; i < n; i++) {
ans += abs(pos[b[i]] - pos[b[i + 1]]);
}
head.next = pos[b[1]];
lis[pos[b[1]]].prev = 0;
for (int i = 1; i < n; i++) {
lis[pos[b[i]]].next = pos[b[i + 1]];
lis[pos[b[i + 1]]].prev = pos[b[i]];
}
tail.prev = pos[b[n]];
lis[pos[b[n]]].next = n + 1;
for (int i = 1; i <= m; i++)
scanf("%d%d", &q[i].l, &q[i].r);
for (int i = 1; i <= m; i++)
q[i].idx = i;
sort (q + 1, q + m + 1);
now = ans;
//cout << ans;
for (int i = 1, l = 1, r = n; i <= m; i++) {
if (q[i].l / len != q[i - 1].l /len) {
while (l < (q[i].l - 1) / len * len + 1) del(l++, now);
r = n;
tmp = ans = now;
}
while (r > q[i].r) del(r--, ans);
tmp = ans;
while (l < q[i].l) del(l++, tmp);
anslist[q[i].idx] = tmp;
while (l > (q[i].l - 1) / len * len + 1) rcv(l--);
}
for (int i = 1; i <= m; i++) printf("%lld\n", anslist[i]);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 16064kb
input:
5 5 1 5 2 4 3 1 5 1 4 1 3 1 2 1 1
output:
7 5 3 1 0
result:
ok 5 number(s): "7 5 3 1 0"
Test #2:
score: 0
Accepted
time: 2ms
memory: 16004kb
input:
1 1 1 1 1
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 24ms
memory: 17216kb
input:
100000 1 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 ...
output:
4999950000
result:
ok 1 number(s): "4999950000"
Test #4:
score: 0
Accepted
time: 2ms
memory: 13952kb
input:
20 1 12 8 13 10 18 14 1 19 5 16 15 9 17 20 6 2 11 4 3 7 9 18
output:
36
result:
ok 1 number(s): "36"
Test #5:
score: -100
Wrong Answer
time: 2ms
memory: 15980kb
input:
20 10 5 16 11 7 19 8 12 13 17 18 6 1 14 3 4 2 15 20 10 9 7 11 7 13 7 17 11 15 1 7 4 6 1 5 6 14 3 5 9 9
output:
18 39 57 18 20 4 8 47 3 -15
result:
wrong answer 1st numbers differ - expected: '7', found: '18'