QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#382267 | #5349. 密钥 | bachbeo2007 | 100 ✓ | 210ms | 164576kb | C++23 | 2.0kb | 2024-04-08 10:04:15 | 2024-04-08 10:04:16 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int maxn=2e7+5;
int p[maxn];
int seed, n, k, S;
int getrand() {
seed = ((seed * 12321) ^ 9999) % 32768;
return seed;
}
void generateData() {
cin >> k >> seed >> S;
int t = 0;
n = k * 2 + 1;
memset(p, 0, sizeof(p));
for( int i = 1; i <= n; ++i ) {
p[i] = (getrand() / 128) % 2;
t += p[i];
}
int i = 1;
while( t > k ) {
while ( p[i] == 0 ) ++i;
p[i] = 0;
--t;
}
while( t < k ) {
while( p[i] == 1 ) ++i;
p[i] = 1;
++t;
}
}
int cnt[maxn*2],sum[maxn];
int CalA(int s){
int cur=0,num=0;
for(int i=1;i<=n;i++){
sum[i]=sum[i-1]+(p[i]?1:-1);
if(p[i]){
cnt[sum[i]+maxn]++;
num+=(sum[i]>0);
}
}
int res=0;
for(int i=1;i<=n;i++){
if(p[i]){
cur++;
num-=cnt[cur+maxn];
}
else{
num+=cnt[cur+maxn];
cur--;
}
if(p[i]){
cnt[-1+cur+maxn]++;cnt[sum[i]+maxn]--;
if(sum[i]>cur) num--;
}
if(num==s && !p[i]) res=i;
}
for(int i=1;i<=n;i++){
if(p[i]) cnt[sum[i]-1+maxn]--;
}
return res;
}
int CalB(int s){
int cur=0,num=-1;
for(int i=1;i<=n;i++){
sum[i]=sum[i-1]+(p[i]?-1:1);
if(!p[i]){
cnt[sum[i]+maxn]++;
num+=(sum[i]>0);
}
}
int res=0;
for(int i=1;i<=n;i++){
if(!p[i]){
cur++;
num-=cnt[cur+maxn];
}
else{
num+=cnt[cur+maxn];
cur--;
}
if(!p[i]){
cnt[1+cur+maxn]++;cnt[sum[i]+maxn]--;
if(sum[i]<=cur) num++;
}
if(num==s && !p[i]) res=i;
}
for(int i=1;i<=n;i++){
if(!p[i]) cnt[sum[i]+1+maxn]--;
}
return res;
}
int main() {
generateData();
cout << CalA(0) << '\n' << CalA(S) << '\n' << CalB(S) << '\n';
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 10
Accepted
time: 0ms
memory: 85472kb
input:
5 1113 1
output:
1 2 7
result:
points 1.0 ok
Test #2:
score: 10
Accepted
time: 0ms
memory: 84824kb
input:
30 4567 15
output:
53 57 57
result:
points 1.0 ok
Test #3:
score: 10
Accepted
time: 3ms
memory: 85428kb
input:
900 9876 123
output:
1793 1307 488
result:
points 1.0 ok
Test #4:
score: 10
Accepted
time: 0ms
memory: 85852kb
input:
60000 5566 60000
output:
120001 8 120001
result:
points 1.0 ok
Test #5:
score: 10
Accepted
time: 11ms
memory: 86732kb
input:
99999 9988 50000
output:
199993 1 3
result:
points 1.0 ok
Test #6:
score: 10
Accepted
time: 46ms
memory: 100996kb
input:
2000000 3479 1234567
output:
4000001 246933 3753076
result:
points 1.0 ok
Test #7:
score: 10
Accepted
time: 114ms
memory: 125640kb
input:
5000000 1010 999
output:
9999996 9994668 5329
result:
points 1.0 ok
Test #8:
score: 10
Accepted
time: 170ms
memory: 148176kb
input:
8000000 8888 888888
output:
15999988 1777780 14222219
result:
points 1.0 ok
Test #9:
score: 10
Accepted
time: 201ms
memory: 156364kb
input:
9000000 9753 3333333
output:
17999996 666669 17333328
result:
points 1.0 ok
Test #10:
score: 10
Accepted
time: 210ms
memory: 164576kb
input:
10000000 10000 7142857
output:
19999994 5714287 14285708
result:
points 1.0 ok
Extra Test:
score: 0
Extra Test Passed