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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#575555 | #7880. Streak Manipulation | wangcq | WA | 1ms | 5804kb | C++17 | 1.4kb | 2024-09-19 15:21:49 | 2024-09-19 15:21:49 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int N=2e5+10,inf=1e9+10;
int n,m,k,a[N],f[N][6],g[N][6];
char c[N];
void read(){
cin>>n>>m>>k;
for(int i=1;i<=n;i++){
cin>>c[i];
a[i]=c[i]-'0';
a[i]+=a[i-1];
}
}
int val(int l,int r){
return (r-l+1)-(a[r]-a[l-1]);
}
bool check(int x){
for(int i=0;i<=n;i++) for(int j=0;j<=5;j++) f[i][j]=g[i][j]=inf;
for(int i=0;i<=n;i++) f[i][0]=g[i][0]=0;
for(int j=1;j<=k;j++){
if(j==1){
f[x][j]=val(1,x);
g[x][j]=f[x][j];
}
for(int i=x+1;i<=n;i++){
f[i][j]=g[i-x-1][j-1]+val(i-x+1,i);
}
for(int i=1;i<=n;i++){
g[i][j]=g[i-1][j];
if(i!=n && c[i+1]=='0') g[i][j]=min(g[i][j],f[i][j]);
}
}
// for(int j=0;j<=k;j++){
// for(int i=0;i<=n;i++){
// cout<<f[i][j]<<' ';
// }
// cout<<'\n';
// }
return (f[n][k]<=m);
}
void work(){
int L=0,R=n+1;
while(L<R){
int mid=(L+R)>>1;
if(check(mid)) L=mid+1;
else R=mid;
}
if(L==1) cout<<"-1\n";
else cout<<L-1<<'\n';
}
int main(){
ios::sync_with_stdio(false);
std::cin.tie(0);
std::cout.tie(0);
// freopen("nzq.in","r",stdin);
// freopen("nzq.out","w",stdout);
read();
work();
// cerr<<1.0*clock()/CLOCKS_PER_SEC<<'\n';
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 1ms
memory: 5792kb
input:
8 3 2 10110110
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5752kb
input:
12 3 3 100100010011
output:
2
result:
ok 1 number(s): "2"
Test #3:
score: 0
Accepted
time: 1ms
memory: 5804kb
input:
4 4 4 0000
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: -100
Wrong Answer
time: 1ms
memory: 5708kb
input:
1000 200 5 0001001000101001110010011001101010110101101100010100111110111111010010001100100111100101011100011101011001110010111100100100011001010011000100011111010110100001101110101001110000001000111010000111110100111101100110011010011111000111101001010011000111010111010100101111100000100001011001010...
output:
96
result:
wrong answer 1st numbers differ - expected: '99', found: '96'