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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#403367 | #1286. Ternary String Counting | cwfxlh | WA | 2ms | 7780kb | C++14 | 2.0kb | 2024-05-02 09:34:02 | 2024-05-02 09:34:04 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define MOD 1000000007
using namespace std;
int T,n,m,v2[50003][2],v3[50003][2],k1,k2,k3,k4,k5,k6,k7,k8,k9,ans;
int dp[5003][5003],hsum[5003],lsum[5003];
int q[100003],lft,rgt,zz[50003];
void del(int X){
for(int i=0;i<=X-2;i++){
if(i>=v3[X][0]&&i<=v3[X][1])continue;
hsum[i]=0;
while(zz[i]<X){
lsum[zz[i]]=(lsum[zz[i]]-dp[i][zz[i]])%MOD;
dp[i][zz[i]]=0;
zz[i]++;
}
}
while(lft<=rgt){
if(q[lft]>=v2[X][0])break;
lsum[q[lft]]=0;
for(int j=0;j<=n;j++){
hsum[j]=(hsum[j]-dp[j][q[lft]])%MOD;
dp[j][q[lft]]=0;
}
lft++;
}
while(lft<=rgt){
if(q[rgt]<=v2[X][1])break;
lsum[q[rgt]]=0;
for(int j=0;j<=n;j++){
hsum[j]=(hsum[j]-dp[j][q[rgt]])%MOD;
dp[j][q[rgt]]=0;
}
rgt--;
}
return;
}
void add(int X,int Y,int val){
hsum[X]=(hsum[X]+val)%MOD;
lsum[Y]=(lsum[Y]+val)%MOD;
dp[X][Y]=(dp[X][Y]+val)%MOD;
return;
}
int stk[50003];
void sol(){
cin>>n>>m;
if(k9==89)cout<<n<<" "<<m<<endl;
for(int i=1;i<=n;i++){
v3[i][0]=0;
v3[i][1]=i+1;
v2[i][0]=0;
v2[i][1]=i+1;
}
for(int i=1;i<=m;i++){
cin>>k1>>k2>>k3;
if(k9==89)cout<<k1<<" "<<k2<<" "<<k3<<endl;
if(k3==1)v2[k2][1]=min(v2[k2][1],k1-1);
if(k3==2){
v2[k2][0]=max(v2[k2][0],k1);
v3[k2][1]=min(v3[k2][1],k1-1);
}
if(k3==3)v3[k2][0]=max(v3[k2][0],k1);
}
for(int i=1;i<=n;i++){
if(v2[i][0]>v2[i][1]||v3[i][0]>v3[i][1]){
cout<<0<<endl;
return;
}
}
for(int i=0;i<=n;i++){
for(int j=0;j<=n;j++)dp[i][j]=0;
hsum[i]=lsum[i]=0;
zz[i]=0;
}
dp[0][0]=3;
hsum[0]=lsum[0]=3;
q[lft=rgt=50000]=0;
del(1);
for(int i=2;i<=n;i++){
for(int j=0;j<i-1;j++)stk[j]=(hsum[j]+lsum[j])%MOD;
for(int j=0;j<i-1;j++)add(j,i-1,stk[j]);
q[++rgt]=i-1;
del(i);
}
ans=0;
for(int i=0;i<=n;i++)ans=(ans+hsum[i])%MOD;
ans%=MOD;
ans+=MOD;
ans%=MOD;
cout<<ans<<endl;
return;
}
signed main(){
ios::sync_with_stdio(false);
cin>>T;
while(T--){
k9++;
sol();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 7724kb
input:
4 1 0 2 0 3 0 5 2 1 3 3 4 5 1
output:
3 9 27 18
result:
ok 4 tokens
Test #2:
score: -100
Wrong Answer
time: 2ms
memory: 7780kb
input:
741 5 3 1 5 3 3 4 2 1 4 3 4 3 2 4 2 1 4 1 2 3 3 10 3 9 10 2 3 6 3 1 9 1 3 4 2 3 2 1 3 2 2 3 3 1 3 3 10 4 6 6 1 9 10 2 4 8 3 4 10 3 6 3 1 4 3 2 4 2 2 2 2 4 3 1 4 1 1 1 2 2 3 1 5 3 4 5 2 4 5 1 1 4 3 9 3 2 3 2 1 9 2 2 4 2 4 3 1 3 3 2 3 2 1 2 3 8 4 5 8 1 4 8 1 3 5 3 1 3 3 9 3 4 5 1 1 5 3 3 8 2 8 3 5 7 2...
output:
90 0 0 0 24300 0 0 0 768 0 0 972 2916 0 6480 864 0 0 0 0 0 0 0 0 6 0 0 0 0 0 96 0 6 0 0 0 0 0 0 0 108 0 0 0 2916 0 0 0 0 0 0 0 0 0 0 324 8748 0 0 0 0 0 0 4320 0 0 0 18 0 0 0 0 0 0 0 0 0 0 0 1992 0 0 450 0 162 1656 0 0 3 3 1 1 1 1 1 3 1 3 1 3 0 0 54 0 18 0 0 0 0 744 0 1620 324 0 0 36 36 0 0 60 6 54 0...
result:
wrong answer 89th words differ - expected: '0', found: '3'