#include<bits/stdc++.h>
#define f first
#define int long long
#define s second
using namespace std;
const int N=5e5+5,mod=1e9+7;
int t,n,q,a[N],tree[N],bef[N],ans[N];
map<int,int>pos;
string s;
vector<pair<int,int> >V[N];
void update(int ind,int val){
for(ind;ind<=n;ind+=ind&(-ind)) tree[ind]+=val;
}
int getans(int ind){
int pas=0;
for(ind;ind>=1;ind-=ind&(-ind)) pas+=tree[ind];
return pas;
}
main(){
// t=1;
cin>>n>>q;
for(int i=1;i<=n;i++){
cin>>a[i];
}
for(int i=1;i<=q;i++){
int l,r;
cin>>l>>r;
V[l].push_back({r,i});
}
for(int i=n;i>=1;i--){
bef[i]=pos[a[i]];
if(bef[bef[i]] ) update(bef[bef[i]],-2);
if(bef[i])update(bef[i],1);
for(int j=0;j<V[i].size();j++){
ans[V[i][j].s] = getans(V[i][j].f);
}
pos[a[i]] = i;
}
for(int i=1;i<=q;i++) cout<<ans[i]<<endl;
}
Compilation message
poklon.cpp: In function 'void update(long long int, long long int)':
poklon.cpp:12:6: warning: statement has no effect [-Wunused-value]
12 | for(ind;ind<=n;ind+=ind&(-ind)) tree[ind]+=val;
| ^~~
poklon.cpp: In function 'long long int getans(long long int)':
poklon.cpp:16:6: warning: statement has no effect [-Wunused-value]
16 | for(ind;ind>=1;ind-=ind&(-ind)) pas+=tree[ind];
| ^~~
poklon.cpp: At global scope:
poklon.cpp:19:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
19 | main(){
| ^~~~
poklon.cpp: In function 'int main()':
poklon.cpp:35:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | for(int j=0;j<V[i].size();j++){
| ~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
8 ms |
12044 KB |
Output isn't correct |
| 2 |
Incorrect |
9 ms |
11980 KB |
Output isn't correct |
| 3 |
Incorrect |
11 ms |
12108 KB |
Output isn't correct |
| 4 |
Incorrect |
21 ms |
12432 KB |
Output isn't correct |
| 5 |
Incorrect |
293 ms |
19404 KB |
Output isn't correct |
| 6 |
Incorrect |
312 ms |
19496 KB |
Output isn't correct |
| 7 |
Incorrect |
601 ms |
25940 KB |
Output isn't correct |
| 8 |
Incorrect |
908 ms |
32552 KB |
Output isn't correct |
| 9 |
Incorrect |
1218 ms |
38996 KB |
Output isn't correct |
| 10 |
Incorrect |
1569 ms |
45620 KB |
Output isn't correct |
