#include<bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define REP(a) F0R(_,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define rsz resize
#define pb push_back
#define f first
#define s second
#define pf push_front
#define ft front()
#define bk back()
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define tcT template<class T
#define tcTU tcT, class U
#define nl "\n"
using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using vb = vector<bool>;
using pi = pair<int,int>;
using vpi = vector<pi>;
using str = string;
using vs = vector<str>;
using db = double;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;
tcTU> using PR = pair<T,U>;
const int MOD = 1e9+7;
const ll INF = 1e18;
const int dx[] = {-1,0,1,0}, dy[] = {0,-1,0,1};
constexpr int bits(int x) { return x == 0 ? 0 : 31 - __builtin_clz(x); }
constexpr bool onbit(int msk, int i) { return msk>>i&1; }
constexpr ll p2(int x) { return 1LL<<x; }
constexpr int pct(int x) { return __builtin_popcount(x); }
constexpr int lg2(int x) { return x == 0 ? 0 : 31 - __builtin_clz(x); }; //int only
tcT> bool ckmin(T&a, const T&b) { return b < a ? a = b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) { return b > a ? a = b,1 : 0; }
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); }
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); }
tcTU> T fstTrue(T lo, T hi, U f) {
hi++; assert(lo <= hi);
while (lo < hi) {
T mid = lo+(hi-lo)/2;
f(mid) ? hi = mid : lo = mid+1;
}
return lo;
}
tcTU> T lstTrue(T lo, T hi, U f) {
lo--; assert(lo <= hi);
while (lo < hi) {
T mid = lo+(hi-lo+1)/2;
f(mid) ? lo = mid : hi = mid-1;
}
return lo;
}
tcT> void remDup(V<T> &v) {
sort(all(v)); v.erase(unique(all(v)), end(v)); }
void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
cerr << h; if(sizeof...(t)) cerr << ", ";
DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL
void setPrec() { cout << fixed << setprecision(16); }
void setIO(string NAME = "") {
cin.tie(0)->sync_with_stdio(0);
setPrec();
if(sz(NAME)) {
freopen((NAME + ".in").c_str(),"r",stdin);
freopen((NAME + ".out").c_str(),"w",stdout);
}
}
const int MX = 5e5+5;
int N,Q, A[MX], ls[MX], rs[MX], lef[MX], rig[MX], ans[MX];
vpi T[MX*4 + 15];
void upd(int x, int l, int r, int L, int v) {
if(L > r || L < l) return;
T[x].pb({rs[v], v});
int mid = (l+r)>>1;
if(l == r) return;
upd(x<<1, l, mid , L, v);
upd(x<<1|1, mid+1, r, L, v);
}
void qryupd(int x, int l, int r, int L, int R, int p1, int p2) {
if(L > r || R < l) return;
if(l >= L && r <= R) {
T[x].pb({p1, -1});
T[x].pb({p2, -2});
return;
}
int mid = (l + r)>>1;
qryupd(x<<1, l, mid, L, R, p1, p2);
qryupd(x<<1|1, mid+1, r, L, R, p1, p2);
}
void calc(int x, int l, int r) {
sort(all(T[x]));
int cnt = 0;
each(v, T[x]) {
if(v.s == -1) ++cnt;
else if(v.s == -2) --cnt;
else ans[v.s] += cnt;
}
if(l == r) return;
int mid = (l + r) >> 1;
calc(x<<1, l, mid);
calc(x<<1|1, mid+1, r);
}
void solve() {
cin>>N>>Q;
F0R(i,N) cin>>A[i];
F0R(i,Q) {
cin>>ls[i]>>rs[i];
ls[i]--; rs[i]--;
upd(1, 0, N-1, ls[i], i);
}
map<int,int> M;
F0R(i,N) {
int pos = -1;
if(M.count(A[i])) pos = M[A[i]];
lef[i] = pos;
M[A[i]] = i;
}
M.clear();
R0F(i,N) {
int pos = N;
if(M.count(A[i])) pos = M[A[i]];
rig[i] = pos;
M[A[i]] = i;
}
rig[N] = N;
F0R(i,N) {
int rpos = rig[i];
if(rpos == N) continue;
qryupd(1,0,N-1, lef[i]+1, i, rpos, rig[rpos]);
}
calc(1, 0, N-1);
F0R(i,Q) cout << ans[i] << nl;
}
int main() {
setIO();
int t=1;
//cin>>t;
while(t-->0) {
solve();
}
return 0;
}
Compilation message
poklon.cpp: In function 'void setIO(std::string)':
poklon.cpp:93:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
93 | freopen((NAME + ".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
poklon.cpp:94:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
94 | freopen((NAME + ".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
24 ms |
47300 KB |
Output is correct |
| 2 |
Correct |
25 ms |
47340 KB |
Output is correct |
| 3 |
Correct |
26 ms |
47604 KB |
Output is correct |
| 4 |
Correct |
34 ms |
48848 KB |
Output is correct |
| 5 |
Correct |
364 ms |
82632 KB |
Output is correct |
| 6 |
Correct |
338 ms |
84684 KB |
Output is correct |
| 7 |
Correct |
856 ms |
134996 KB |
Output is correct |
| 8 |
Correct |
1348 ms |
184208 KB |
Output is correct |
| 9 |
Correct |
1813 ms |
228952 KB |
Output is correct |
| 10 |
Correct |
2199 ms |
270388 KB |
Output is correct |
