Submission #1167467

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167467		yeediot	역사적 조사 (JOI14_historical)	C++20	100 / 100	182 ms	7856 KiB

historic

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 1e5 + 5;
int v[mxn], id[mxn], cnt[mxn], cnt2[mxn], an;
vector<int>tmp;
void solve(){
    int n, q;
    cin >> n >> q;
    for(int i = 1; i <= n; i++){
        cin >> v[i];
        tmp.pb(v[i]);
    }
    sort(all(tmp));
    tmp.resize(unique(all(tmp)) - tmp.begin());
    for(int i = 1; i <= n; i++){
        id[i] = lower_bound(all(tmp), v[i]) - tmp.begin();
    }
    int nl = 1, nr = 1;
    vector<array<int, 3>>qry;
    for(int i = 0; i < q; i++){
        int l, r;
        cin >> l >> r;
        qry.pb({l, r, i});
    }
    const int B = sqrt(n) / 2;
    sort(all(qry), [&](array<int, 3>a, array<int, 3>b){
        int ba = a[0] / B, bb = b[0] / B;
        if(ba != bb) return ba < bb;
        return a[1] < b[1];
    });
    vector<int>ans(q);
    int lb = -1;
    cnt[id[1]]++;
    for(auto [l, r, idx] : qry){
        int bl = l / B, br = r / B;
        if(bl == br){
            for(int i = l; i <= r; i++){
                cnt2[id[i]]++;
                chmax(ans[idx], cnt2[id[i]] * v[i]);
            }
            for(int i = l; i <= r; i++){
                cnt2[id[i]]--;
            }
            continue;
        }
        if(bl != lb){
            int R = min(n, (bl + 1) * B - 1);
            while(nr > R){
                cnt[id[nr]]--;
                nr--;
            }
            while(nl < R){
                cnt[id[nl]]--;
                nl++;
            }
            an = cnt[id[R]] * v[R];
            debug(nl, nr, R, an);
            lb = bl;
        }
        int ol = nl;
        while(nr < r){
            nr++;
            cnt[id[nr]]++;
            chmax(an, cnt[id[nr]] * v[nr]);
        }
        int oans = an;
        while(nl > l){
            nl--;
            cnt[id[nl]]++;
            chmax(an, cnt[id[nl]] * v[nl]);
        }
        debug(nl, nr, an, id[4], cnt[id[4]]);
        ans[idx] = an;
        an = oans;
        while(nl < ol){
            cnt[id[nl]]--;
            nl++;
        }
        lb = bl;
    }
    for(int i = 0; i < q; i++){
        cout << ans[i] << '\n';
    }
}
signed main(){
    TOI_is_so_de;
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
        std::ifstream file1(p1);
        std::ifstream file2(p2);
        if(!file1.is_open() || !file2.is_open()) return false;
        std::string line1, line2;
        while (getline(file1, line1) && getline(file2, line2)) {
            if (line1 != line2)return false;
        }
        int cnta = 0, cntb = 0;
        while(getline(file1,line1))cnta++;
        while(getline(file2,line2))cntb++;
        return cntb - cnta <= 1;
    };
    bool check = compareFiles("output.txt","expected.txt");
    if(check) cerr<<"ACCEPTED\n";
    else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 60 / 60