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#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
int fre[500];
vector <int> v[500],arr;
int pre[2000000];
void construct(char a,char b){
int i=0,j=0;
arr.clear();
while(i!=v[a].size()||j!=v[b].size()){
if(i==v[a].size()){
arr.push_back(-1);
j++;
}
else if(j==v[b].size()||v[b][j]>v[a][i]){
arr.push_back(1);
i++;
}
else{
arr.push_back(-1);
j++;
}
}
return;
}
int calc(){
int n=arr.size(),st=0,mn=1e9,ans=0;
pre[0]=arr[0];
for(int i=1;i<n;i++) pre[i]=pre[i-1]+arr[i];
for(int i=0;i<n;i++){
if(arr[i]==-1){
for(int j=st;j<i;j++) mn=min(mn,pre[j]);
st=i;
}
ans=max(ans,pre[i]-mn);
}
return ans;
}
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int n,ans=1;
cin>>n;
string s;
cin>>s;
for(int i=0;i<s.size();i++) v[s[i]].push_back(i);
for(int c1='a';c1<='z';c1++){
for(int c2='a';c2<='z';c2++){
if(c1==c2) continue;
construct(c1,c2);
ans=max(ans,calc());
}
}
cout<<ans<<endl;
return 0;
}
Compilation message
roz.cpp: In function 'void construct(char, char)':
roz.cpp:18:16: warning: array subscript has type 'char' [-Wchar-subscripts]
18 | while(i!=v[a].size()||j!=v[b].size()){
| ^
roz.cpp:18:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | while(i!=v[a].size()||j!=v[b].size()){
| ~^~~~~~~~~~~~~
roz.cpp:18:32: warning: array subscript has type 'char' [-Wchar-subscripts]
18 | while(i!=v[a].size()||j!=v[b].size()){
| ^
roz.cpp:18:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | while(i!=v[a].size()||j!=v[b].size()){
| ~^~~~~~~~~~~~~
roz.cpp:19:17: warning: array subscript has type 'char' [-Wchar-subscripts]
19 | if(i==v[a].size()){
| ^
roz.cpp:19:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
19 | if(i==v[a].size()){
| ~^~~~~~~~~~~~~
roz.cpp:23:22: warning: array subscript has type 'char' [-Wchar-subscripts]
23 | else if(j==v[b].size()||v[b][j]>v[a][i]){
| ^
roz.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
23 | else if(j==v[b].size()||v[b][j]>v[a][i]){
| ~^~~~~~~~~~~~~
roz.cpp:23:35: warning: array subscript has type 'char' [-Wchar-subscripts]
23 | else if(j==v[b].size()||v[b][j]>v[a][i]){
| ^
roz.cpp:23:43: warning: array subscript has type 'char' [-Wchar-subscripts]
23 | else if(j==v[b].size()||v[b][j]>v[a][i]){
| ^
roz.cpp: In function 'int main()':
roz.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | for(int i=0;i<s.size();i++) v[s[i]].push_back(i);
| ~^~~~~~~~~
roz.cpp:57:39: warning: array subscript has type 'char' [-Wchar-subscripts]
57 | for(int i=0;i<s.size();i++) v[s[i]].push_back(i);
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
344 KB |
Output is correct |
| 2 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
48 ms |
1116 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Correct |
3 ms |
604 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
484 ms |
10228 KB |
Output is correct |
| 2 |
Runtime error |
1 ms |
604 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
504 ms |
9976 KB |
Output is correct |
| 2 |
Correct |
363 ms |
8952 KB |
Output is correct |
| 3 |
Correct |
122 ms |
7920 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
469 ms |
10136 KB |
Output is correct |
| 2 |
Correct |
157 ms |
12500 KB |
Output is correct |
| 3 |
Runtime error |
9 ms |
11508 KB |
Execution killed with signal 11 |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
502 ms |
9976 KB |
Output is correct |
| 2 |
Runtime error |
12 ms |
12264 KB |
Execution killed with signal 11 |
| 3 |
Halted |
0 ms |
0 KB |
- |
