제출 #944121

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
944121		teacup	3단 점프 (JOI19_jumps)	C++14	5 / 100	4053 ms	39332 KiB

jumps

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ii pair<int,int>
typedef vector<int> vi;
#define iii tuple<int,int,int>
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef map<int,int> mii;

#ifndef debug 
    #define cerr if (0) cerr
#endif

const int INF=1e17;
struct node {
    int s, e;
    int mn, mx, sum, add_val, set_val;
    bool lset;
    node *l, *r;
    node (int _s, int _e, int A[] = NULL): s(_s), e(_e), mn(0), mx(0), sum(0), lset(0), add_val(0), set_val(0), l(NULL), r(NULL) {
        if (A == NULL) return;
        if (s == e) mn = mx = sum = A[s];
        else {
            l = new node(s, (s+e)>>1, A), r = new node((s+e+2)>>1, e, A);
            combine();
        }
    }
    void create_children() {
        if (s == e) return;
        if (l != NULL) return;
        int m = (s+e)>>1;
        l = new node(s, m);
        r = new node(m+1, e);
    }
    void self_set(int v) {
        lset = 1;
        mn = mx = set_val = v;
        sum = v * (e-s+1);
        add_val = 0;
    }
    void self_add(int v) {
        if (lset) { self_set(v + set_val); return; }
        mn += v, mx += v, add_val += v;
        sum += v*(e-s+1);
    }
    void lazy_propagate() {
        if (s == e) return;
        if (lset) {
            l->self_set(set_val), r->self_set(set_val);
            lset = set_val = 0;
        }   
        if (add_val != 0) {
            l->self_add(add_val), r->self_add(add_val);
            add_val = 0;
        }
    }
    void combine() {
        if (l == NULL) return;
        sum = l->sum + r->sum;
        mn = min(l->mn, r->mn);
        mx = max(l->mx, r->mx);
    }
    #define UPDATE(name)\
    void name(int x, int y, int v) { \
        if (s == x && e == y) { self_##name(v); return; } \
        int m = (s+e)>>1; \
        create_children(); lazy_propagate(); \
        if (x <= m) l->name(x, min(y, m), v); \
        if (y > m) r->name(max(x, m+1), y, v); \
        combine(); \
    }
    UPDATE(add)                 //generates add
    UPDATE(set)                 //generates set
    #define QUERY(name, fn, var, lazyfn)\
    int range_##name(int x, int y) {\
        if (s == x && e == y) return var; \
        if (l == NULL || lset) return lazyfn(var);\
        int m = (s+e)>>1; lazy_propagate(); \
        if (y <= m) return l->range_##name(x, y); \
        if (x > m) return r->range_##name(x, y); \
        return fn(l->range_##name(x, m), r->range_##name(m+1, y)) ; \
    }
    #define SAME(var) (var)
    #define PART(var) ((var) /(e-s+1) * (y-x+1)) 
    #define SUM(a, b) ((a)+(b))
    QUERY(min, min, mn, SAME)   //generates range_min
    QUERY(max, max, mx, SAME)   //generates range_max
    QUERY(sum, SUM, sum, PART)  //generates range_sum
    ~node() {
        if (l != NULL) delete l;
        if (r != NULL) delete r;
    }
} *root;

int N, Q, L, R, ans;

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
	
	cin>>N; int A[N+5];
	for (int i=1; i<=N; i++){
		cin>>A[i];
	}
	root = new node(1, N+5, A);
	
	cin>>Q;
    while (Q--){
        cin>>L>>R;
        ans = 0;
		for (int i=L; i<=R; i++){
			for (int j=i+1; j<=R; j++){
				
				/*for (int k=j+1; k<=R; k++){
					if (!(j-i <= k-j)) continue;
					ans=max(ans, A[i]+A[j]+A[k]);
				}*/
				//printf("P %lld %lld %lld %lld\n",i,j,2*j-i, R);
				if (2*j-i>R) continue;
				ans=max(ans, A[i]+A[j]+root->range_max(max(j+1,2*j-i), R));
				//printf("A %lld\n", ans);
			}
		}
		//printf("%lld\n", ans);
		cout<<ans<<"\n";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

jumps.cpp: In constructor 'node::node(long long int, long long int, long long int*)':
jumps.cpp:20:10: warning: 'node::lset' will be initialized after [-Wreorder]
   20 |     bool lset;
      |          ^~~~
jumps.cpp:19:22: warning:   'long long int node::add_val' [-Wreorder]
   19 |     int mn, mx, sum, add_val, set_val;
      |                      ^~~~~~~
jumps.cpp:22:5: warning:   when initialized here [-Wreorder]
   22 |     node (int _s, int _e, int A[] = NULL): s(_s), e(_e), mn(0), mx(0), sum(0), lset(0), add_val(0), set_val(0), l(NULL), r(NULL) {
      |     ^~~~
jumps.cpp: In member function 'void node::lazy_propagate()':
jumps.cpp:52:28: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   52 |             lset = set_val = 0;
      |                    ~~~~~~~~^~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54