Submission #433213

#	Time	Username	Problem	Language	Result	Execution time	Memory
433213		cpp219	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	677 ms	33236 KiB

worst_reporter3

#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 5e5 + 9;
const ll mod = 1e9 + 7;
const ll base = 31;
typedef pair<ll,ll> LL;

ll n,Q,x,pre[N],T,L,R,a[N],val[N];
ll Getpos(ll nTime,ll id){
    if (!id) return nTime;
    //cout<<nTime<<" "<<id <<" "<< val[id]<<"x\n";
    ll jump = nTime/(val[id]); //cout<<jump; exit(0);
    return jump * val[id] - id;
}

ll GetLast(){
    ll l,m,h; l = 0; h = n;
    while(l <= h){
        m = (l + h)/2; //cout<<Getpos(T,m)<<"x\n";
        if (Getpos(T,m) >= L) l = m + 1;
        else h = m - 1;
    }
    //exit(0);
    return h;
}

ll GetFirst(){
    ll l,m,h; l = 0; h = n;
    while(l <= h){
        m = (l + h)/2;
        if (Getpos(T,m) > R) l = m + 1;
        else h = m - 1;
    }
    return l;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n>>Q;
    for (ll i = 1;i <= n;i++) cin>>x,pre[i] = (pre[i - 1] + x),a[i] = x;
    val[1] = a[1];
    for (ll i = 2;i <= n;i++){
        ll up = ceil((ld)a[i]/val[i - 1]);
        val[i] = val[i - 1]*up;
    }
    //cout<<Getpos(190,5); return 0;
    while(Q--){
        cin>>T>>L>>R;
        //for (ll i = 0;i <= n;i++) cout<<Getpos(T,i)<<" "; return 0;
        if (T < L) cout<<"0\n";
        else cout<<GetLast() - GetFirst() + 1<<"\n";
        //cout<<GetLast()<<" "<<GetFirst(); return 0;
    }
}

Compilation message (stderr)

worst_reporter3.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
worst_reporter3.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81