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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#665857 | #8150. XOR Sum | qdsdsy | WA | 3ms | 2648kb | C++20 | 2.9kb | 2024-10-22 15:35:49 | 2024-10-22 15:35:49 |
Judging History
answer
#include<cstdio>
#include<cstring>
#include<algorithm>
#define ll long long
using namespace std;
const int mo=1000000007;
ll n,k;
ll m;
int cm,cn;
int bm[64],bn[64];
int C[20][20];
int f[50][1<<7][20][2];
int getn(int l,int r){
l--,r--;
return n>>l&((1ll<<(r-l+1))-1);
}
int main()
{
scanf("%lld%lld%d",&n,&m,&k);
// printf("%d\n",getn(1,3));
C[0][0]=1;
for(int i=1;i<=k;i++){
C[i][0]=1;
for(int j=1;j<=k;j++)
C[i][j]=(C[i-1][j-1]+C[i-1][j])%mo;
}
while(m){
bm[++cm]=m&1ll;
m>>=1ll;
}
ll n1=n;
while(n1){
bn[++cn]=n1&1ll;
// printf("! %d\n",n1&1ll);
n1>>=1ll;
// printf("!! %d\n",n1);
}
memset(f,0,sizeof(f));
f[cm+1][0][k][0]=1;
for(int i=cm+1;i>1;i--){
for(int j=0;j<(1<<7);j++){
for(int t=0;t<=k;t++){
// if(i==2 && j==0 && t==0)
// printf("?\n");
if(!f[i][j][t][0] && !f[i][j][t][1]) continue;
// if(i==2 && j==0 && t==0)
// printf("?\n");
if(bm[i-1]==0){
for(int d=0;d<=k-t;d++){
int s=d*(k-d);
int s1=((j<<1)+s);
int p=s1&127, q=s1>>7, c=s1>>8;
ll v1=1ll*f[i][j][t][1]*C[k-t][d]%mo, v0=1ll*f[i][j][t][0]*C[k-t][d]%mo;
if(p>getn(i-1,i+5)){
if((c==0 && q==1 && bn[i+6]==0) || (c==1 && q==0 && bn[i+6]==1))
f[i-1][p][t][1]=(f[i-1][p][t][1]+v1)%mo;
}else {
if(c==1){
if(q<=bn[i+6]){
if(q==0 && bn[i+6]==1) f[i-1][p][t][1]=(f[i-1][p][t][1]+v1)%mo;
else f[i-1][p][t][0]=(f[i-1][p][t][0]+v1)%mo;
}
}else {
if(q==1 && bn[i+6]==0) f[i-1][p][t][1]=(f[i-1][p][t][1]+v1)%mo;
else if(q==0 && bn[i+6]==1) f[i-1][p][t][1]=(f[i-1][p][t][1]+v0)%mo;
else f[i-1][p][t][0]=(f[i-1][p][t][0]+v0)%mo;
}
}
}
}else {
for(int d=0;d<=k;d++){
int s=d*(k-d);
int s1=((j<<1)+s);
int p=s1&127, q=s1>>7, c=s1>>8;
// if(q==1 || c==1)
// printf("error\n");
for(int e=0;e<=min(d,t);e++){
ll v0=1ll*f[i][j][t][0]*C[t][e]%mo*C[k-t][d-e]%mo;
ll v1=1ll*f[i][j][t][1]*C[t][e]%mo*C[k-t][d-e]%mo;
// if(t==0 && e==0 && i==2 && j==0){
// printf("!! s1=%d p=%d q=%d c=%d\n",s1,p,q,c);
// }
if(p>getn(i-1,i+5)){
if((c==0 && q==1 && bn[i+6]==0) || (c==1 && q==0 && bn[i+6]==1))
f[i-1][p][e][1]=(f[i-1][p][e][1]+v1)%mo;
}else {
if(c==1){
if(q<=bn[i+6]){
if(q==0 && bn[i+6]==1) f[i-1][p][e][1]=(f[i-1][p][e][1]+v1)%mo;
else f[i-1][p][e][0]=(f[i-1][p][e][0]+v1)%mo;
}
}else {
if(q==1 && bn[i+6]==0) f[i-1][p][e][1]=(f[i-1][p][e][1]+v1)%mo;
else if(q==0 && bn[i+6]==1) f[i-1][p][e][1]=(f[i-1][p][e][1]+v0)%mo;
else f[i-1][p][e][0]=(f[i-1][p][e][0]+v0)%mo;
}
}
}
}
}
}
}
}
ll ans=0;
for(int t=0;t<=k;t++)
ans=(ans+f[1][getn(1,7)][t][0])%mo;
printf("%lld\n",ans);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 2612kb
input:
6 2 3
output:
12
result:
ok 1 number(s): "12"
Test #2:
score: 0
Accepted
time: 0ms
memory: 2632kb
input:
30 6 5
output:
1520
result:
ok 1 number(s): "1520"
Test #3:
score: 0
Accepted
time: 0ms
memory: 2648kb
input:
0 0 1
output:
1
result:
ok 1 number(s): "1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 2612kb
input:
0 0 2
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: 0
Accepted
time: 0ms
memory: 2576kb
input:
0 1145141919 2
output:
145141913
result:
ok 1 number(s): "145141913"
Test #6:
score: 0
Accepted
time: 0ms
memory: 2624kb
input:
0 0 18
output:
1
result:
ok 1 number(s): "1"
Test #7:
score: 0
Accepted
time: 0ms
memory: 2640kb
input:
0 12412414 18
output:
12412415
result:
ok 1 number(s): "12412415"
Test #8:
score: -100
Wrong Answer
time: 3ms
memory: 2540kb
input:
32071009996106 682053093123 12
output:
827137534
result:
wrong answer 1st numbers differ - expected: '443207413', found: '827137534'