Submission #44602

#	Time	Username	Problem	Language	Result	Execution time	Memory
44602		PowerOfNinjaGo	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	100 / 100	1165 ms	20924 KiB

worst_reporter3

//Power Of Ninja Go
#include <bits/stdc++.h>
//#ifdef atom #else #endif
using namespace std;
typedef long long ll; typedef pair<int, int> ii; typedef vector<int> vi; typedef vector< ii > vii;
#define X first
#define Y second
#define pb push_back
int n, q;
const int maxn = 5e5+5;
int arr[maxn];
int mx[maxn];
int team[maxn];
int rng[maxn];
ll intv[maxn];
ll dx[maxn];
vector<int> cap;
ll getPos(int id, int t)
{
    int cap = team[id];
    int rnd = t/intv[cap];
    ll res = -id;
    res += rnd*dx[cap];
    //printf("getPos(%d, %d) = %lld\n", id, t, res);
    return res;
}
int cnt(ll x, int t)
{
    int lo = 1, hi = n+1;
    while(lo< hi)
    {
        int mid = (lo+hi)/2;
        if(getPos(mid, t)<= x) hi = mid;
        else lo = mid+1;
    }
    //printf("end %d\n", lo);
    return n+1-lo;
}
int main()
{
    scanf("%d %d", &n, &q);
    for(int i = 1; i<= n; i++) scanf("%d", &arr[i]);
    for(int i = 1; i<= n; i++)
    {
        if(arr[i]> mx[i-1])
        {
            mx[i] = arr[i];
            rng[i] = 1;
            team[i] = i;
            cap.pb(i);
        }
        else
        {
            mx[i] = mx[i-1];
            rng[i] = rng[i-1]+1;
            team[i] = team[i-1];
        }
    }
    for(int i = 0; i< (int) cap.size(); i++)
    {
        int x = cap[i];
        if(i == 0) intv[x] = arr[x], dx[x] = arr[x];
        else
        {
            int w = cap[i-1];
            int rnd = (arr[x]+dx[w]-1)/dx[w];
            intv[x] = intv[w]*rnd;
            dx[x] = dx[w]*rnd;
        }
    }
    while(q--)
    {
        ll x, y, t; scanf("%lld %lld %lld", &t, &x, &y);
        int res = cnt(y, t)-cnt(x-1, t);
        if(x<= t && t<= y) res++;
        printf("%d\n", res);
    }
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~~
worst_reporter3.cpp:42:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1; i<= n; i++) scanf("%d", &arr[i]);
                                ~~~~~^~~~~~~~~~~~~~~
worst_reporter3.cpp:73:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         ll x, y, t; scanf("%lld %lld %lld", &t, &x, &y);
                     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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