Submission #203105

#	Time	Username	Problem	Language	Result	Execution time	Memory
203105		mhy908	Sushi (JOI16_sushi)	C++14	100 / 100	7427 ms	82384 KiB

sushi

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sortvec(x) sort(all(x))
#define compress(x) x.erase(unique(all(x)), x.end())
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
const LL llinf=1987654321987654321;
const int inf=2000000000;
int n, q, sq;
int arr[400010];
priority_queue<int> pq[1010];
vector<int> temp[1010];
int query2(int a, int b, int c){
    if(a>b)return c;
    priority_queue<int, vector<int>, greater<int> > tpq;
    int buca=(a-1)/sq;
    for(auto i:temp[buca])tpq.push(i);
    temp[buca].clear();
    for(int i=buca*sq+1; i<=(buca+1)*sq; i++){
        tpq.push(arr[i]);
        arr[i]=tpq.top();
        tpq.pop();
    }
    for(int i=a; i<=b; i++){
        if(c<arr[i])swap(c, arr[i]);
    }
    while(!pq[buca].empty())pq[buca].pop();
    for(int i=buca*sq+1; i<=(buca+1)*sq; i++)pq[buca].push(arr[i]);
    return c;
}
int query(int a, int b, int c){
    int buca=(a-1)/sq+1, bucb=(b-1)/sq;
    if(buca>bucb)return query2(a, b, c);
    c=query2(a, buca*sq, c);
    for(int i=buca; i<bucb; i++){
        temp[i].pb(c);
        pq[i].push(c);
        c=pq[i].top();
        pq[i].pop();
    }
    c=query2(bucb*sq+1, b, c);
    return c;
}
int main(){
    scanf("%d %d", &n, &q);
    sq=sqrt(n);
    for(int i=1; i<=n; i++){
        scanf("%d", &arr[i]);
        pq[(i-1)/sq].push(arr[i]);
    }
    for(int i=1; i<=q; i++){
        int a, b, c;
        scanf("%d %d %d", &a, &b, &c);
        if(a<=b)printf("%d\n", query(a, b, c));
        else printf("%d\n", query(1, b, query(a, n, c)));
    }
}

Compilation message (stderr)

sushi.cpp: In function 'int main()':
sushi.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &q);
     ~~~~~^~~~~~~~~~~~~~~~~
sushi.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~
sushi.cpp:61:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &a, &b, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 80 / 80