Submission #941321

#	Time	Username	Problem	Language	Result	Execution time	Memory
941321		phamducminh	Poklon (COCI17_poklon)	C++17	0 / 140	2 ms	2396 KiB

poklon

//******************/
//*   I<3   C++    */
//*  I WANT ANY AC */
//* I LOVE PROGRAM!*/
//*IT'S INTERESTING*/
//* I LOVE PROGRAM!*/
//*  IN CONTESTS   */
//*   GET SCORE    */
//*    AC CODE     */
//*     LET'S      */
//*      GO        */
//*  Written by:   */
//*   Duc Minh     */






#include <bits/stdc++.h>
#include <iostream>
#include <cmath>
#include <vector>
#include <map>
#include <set>
#include <stack>
#include <algorithm>
#include <string>
#include <queue>
#include <cctype>
#include <cstring>
#include <iomanip>
#include <deque>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>

using namespace std;
// using namespace __gnu_pbds;

#define  file(name)  freopen(name".inp", "r", stdin);\
                     freopen(name".out", "w", stdout);
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
#define TIME        (1.0 * clock() / CLOCKS_PER_SEC)
#define all(a)      a.begin(),a.end()
#define endl        "\n"
#define all1(a)     a+1,a+n+1
#define unordered_map  map
// #define push_back   emplace_back
// #define gcd(a,b)    __gcd(a,b);
// #define lcm(a,b)    (a*b)/gcd(a,b);

const long long INF = (long long)1e9;
const long long MOD = (long long)1e9+7;
const long long MODD = 2024; /// 998244353
const long long maxN = 5e5+12;
const int LOG = 700;
const int mlift = 58;


template<class A> inline int __lg(A &a) {  return static_cast<int>(log2(a));}
template<class A,class B> inline void add(A &a,B b) { a+=b;while (a>=MOD) a-=MOD;}
template<class A,class B> inline void minus(A &a,B b) { a-=b;while (a>=MOD) a-=MOD;while (a<0) a+=MOD;}






///--------------------------------


void solve();

signed main(){

    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    #ifndef ONLINE_JUDGE
        file("ducminh");
    #endif


    // file("BAI4");







    long long t;


    // cin >> t; 

    t=1;



    while (t--){




        solve();


    }





    cerr << "Time elapsed: " << TIME << "s.\n";
    cerr << "ducminh" << "\n";
    return 0;
}



///--------------------[PROBLEM SOLUTION]--------------------///




int a[maxN],cur=0,n,q,ans[maxN],block;
int _left, _right;
int mm[maxN];

struct Query {
    int l, r, pos;
};

Query queries[maxN];


bool cmp(Query x, Query y) {
    return (make_pair(x.l / block, x.r) < make_pair(y.l / block, y.r));
}



void add(int pos) {
    if(pos == 0) return;
    int x = a[pos];
    if(mm[x] == 2) cur--;
    mm[x]++;
    if(mm[x] == 2) cur++;
}
 
void erase(int pos) {
    if(pos == 0) return;
    int x = a[pos];
    if(mm[x] == 2) cur--;
    mm[x]--;
    if(mm[x] == 2) cur++;
}
 



void mo(int i){

    int left = queries[i].l, right = queries[i].r;

    while (_left<left){
        erase(_left);
        _left++;
    }
    while (_left>left){
        add(_left-1);
        _left--;
    }
    while (_right>right){
        erase(_right);
        _right--;
    }
    while (_right<right){
        add(_right+1);
        _right++;
    } 
}



void solve(){


    cin >> n >> q;

    block=(int)sqrt(n);

    for (int i=1; i<=n; i++){
        cin >> a[i];
    }



    for (int i=1; i<=q; i++){
        cin >> queries[i].l >> queries[i].r;

        queries[i].pos=i;
    }


    sort(queries+1,queries+q+1,cmp);


    for (int i=1; i<=q; i++){

        mo(i);
        ans[queries[i].pos]=cur;
    }


    for (int i=1; i<=q; i++){
        cout << ans[i] << "\n";
    }




}

Compilation message (stderr)

poklon.cpp: In function 'int main()':
poklon.cpp:40:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | #define  file(name)  freopen(name".inp", "r", stdin);\
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
poklon.cpp:78:9: note: in expansion of macro 'file'
   78 |         file("ducminh");
      |         ^~~~
poklon.cpp:41:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |                      freopen(name".out", "w", stdout);
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
poklon.cpp:78:9: note: in expansion of macro 'file'
   78 |         file("ducminh");
      |         ^~~~

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