QOJ.ac
QOJ
ID | Submission ID | Problem | Hacker | Owner | Result | Submit time | Judge time |
---|---|---|---|---|---|---|---|
#1286 | #820092 | #9536. Athlete Welcome Ceremony | redbluetulip | redbluetulip | Failed. | 2024-12-18 19:54:48 | 2024-12-18 19:54:49 |
Details
Extra Test:
Accepted
time: 601ms
memory: 234836kb
input:
300 1 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????...
output:
983076142
result:
ok single line: '983076142'
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#820092 | #9536. Athlete Welcome Ceremony | redbluetulip | AC ✓ | 635ms | 235848kb | C++17 | 3.1kb | 2024-12-18 19:32:37 | 2024-12-18 19:32:46 |
answer
#include<iostream>
#include<algorithm>
#include<cstring>
using namespace std;
using ll = long long;
const int N=310;
const ll mod=1e9+7;
int n,q;
ll ans[2][N][N][3];
ll f[N][N][N];
string s;
int main()
{
ios::sync_with_stdio(0);
cin.tie(0),cout.tie(0);
cin>>n>>q;
cin>>s;
if(s[0]=='?'){
ans[0][1][0][0]=ans[0][0][1][1]=ans[0][0][0][2]=1;
}
if(s[0]=='a') ans[0][1][0][0]=1;
if(s[0]=='b') ans[0][0][1][1]=1;
if(s[0]=='c') ans[0][0][0][2]=1;
for(int i=1;i<n;i++)
{
if(s[i]=='?')
{
for(int j=0;j<=i;j++)
{
for(int k=0;k+j<=i;k++)
{
ans[i&1][j+1][k][0]=(ans[(i-1)&1][j][k][1]+ans[(i-1)&1][j][k][2])%mod;
ans[i&1][j][k+1][1]=(ans[(i-1)&1][j][k][0]+ans[(i-1)&1][j][k][2])%mod;
ans[i&1][j][k][2]=(ans[(i-1)&1][j][k][0]+ans[(i-1)&1][j][k][1])%mod;
}
}
}
else{
int a=s[i]=='a',b=s[i]=='b';
for(int j=0;j<=i;j++)
{
for(int k=0;k+j<=i;k++)
{
if(s[i]=='a'){
ans[i&1][j+1][k][0]=(ans[(i-1)&1][j][k][1]+ans[(i-1)&1][j][k][2])%mod;
ans[i&1][j][k+1][1]=0;
ans[i&1][j][k][2]=0;
}
else if(s[i]=='b'){
ans[i&1][j+1][k][0]=0;
ans[i&1][j][k+1][1]=(ans[(i-1)&1][j][k][0]+ans[(i-1)&1][j][k][2])%mod;
ans[i&1][j][k][2]=0;
}
else{
ans[i&1][j+1][k][0]=0;
ans[i&1][j][k+1][1]=0;
ans[i&1][j][k][2]=(ans[(i-1)&1][j][k][0]+ans[(i-1)&1][j][k][1])%mod;
}
}
}
}
}
int cnt1=0,cnt2=0,cnt3=0;
for(int i=0;i<n;i++){
if(s[i]=='a') cnt1++;
else if(s[i]=='b') cnt2++;
else if(s[i]=='c') cnt3++;
}
for(int i=0;i<=n;i++){
for(int j=0;j+i<=n;j++)
{
f[i][j][n-i-j]=(ans[(n-1)&1][i][j][0]+ans[(n-1)&1][i][j][1]+ans[(n-1)&1][i][j][2])%mod;
}
}
for(int p=n+1;p<=3*n;p++)
{
for(int i=0;i<=n;i++){
for(int j=min(n,p-i);p-i-j<=n;j--){
int minus1=(i>0),minus2=(j>0),minus3=(p-i-j>0);
int cnt=0;
f[i][j][p-i-j]=(f[i-minus1][j][p-i-j]+f[i][j-minus2][p-i-j]+f[i][j][p-i-j-minus3])%mod;
if(minus1&&minus2) f[i][j][p-i-j]=(f[i][j][p-i-j]-f[i-1][j-1][p-i-j]+mod)%mod,cnt++;
if(minus3&&minus2) f[i][j][p-i-j]=(f[i][j][p-i-j]-f[i][j-1][p-i-j-1]+mod)%mod,cnt++;
if(minus1&&minus3) f[i][j][p-i-j]=(f[i][j][p-i-j]-f[i-1][j][p-i-j-1]+mod)%mod,cnt++;
if(cnt>1) f[i][j][p-i-j]=(f[i][j][p-i-j]+f[i-minus1][j-minus2][p-i-j-minus3])%mod;
}
}
}
while(q--)
{
int a,b,c;
cin>>a>>b>>c;
a=min(n,cnt1+a),b=min(n,cnt2+b),c=min(cnt3+c,n);
cout<<f[a][b][c]<<'\n';
}
}