标签：print   amp   ring   mat   efi   uil   pushd   for   char s   

此代码是个假代码，只能糊弄luogu，以后再改，路过大佬也可以帮一下辣

/*
    //fang zhi luan ma er xie E and C hun xue
    yi kai shi que shi mei kan chu lai dan diao xing
    mo bu shi zai jia wo
    ran hou guo duan liang fa ti jie hou hai shi kan bu chu dan xiao xing
    na jiou zai lai yi fa ti jie
    interesting
    yuan lai check han shu shi zhe yang de ya
    23333
    I konw
    bing bu shi zhi jie pan duan zhe ge mid shi bu shi ans
    er shi check zhe ge mid he ans de da xiao guan xi
    other:
    yuan lai seg tree hai ke yi qu jian fu zhi me
    interesting
    xian duan tree tql
*/

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#define root 1,n,1
#define lson l,mid,rt<<1
#define rson mid+1,r,rt<<1|1
using namespace std;
const int maxn = 1e5 + 7;
const int maxm = 4e5 + 7;

int n, m, k, a[maxn], b[maxn], S[maxn], T[maxn];;
// lazy is first 1 space
int sum[maxm], lazy[maxn];
bool is_up_down[maxn];

int read() {
    int x = 0, f = 1; char s = getchar();
    for (; s < '0' || s > '9'; s = getchar()) if (s == '-') f = -1;
    for (; s >= '0' && s <= '9'; s = getchar()) x = x * 10 + s - '0';
    return x * f;
}

void pushup(int rt) {
    sum[rt] = sum[rt << 1] + sum[rt << 1 | 1];
}

void pushdown(int rt, int lsize, int rsize) {
    if (lazy[rt] != -1) {
        lazy[rt << 1] = lazy[rt];
        lazy[rt << 1 | 1] = lazy[rt];
        sum[rt << 1] = lazy[rt] * lsize;
        sum[rt << 1 | 1] = lazy[rt] * rsize;
        lazy[rt] = -1;
    }
}

void build(int l, int r, int rt) {
    if (l == r) {
        sum[rt] = b[l];
        return;
    }
    int mid = (l + r) >> 1;
    build(lson);
    build(rson);
    pushup(rt);
}

void update(int L, int R, int k, int l, int r, int rt) {
    if (L > R) return;
    if (L <= l && r <= R) {
        sum[rt] = k * (r - l + 1);
        lazy[rt] = k;
        return;
    }
    int mid = (l + r) >> 1;
    pushdown(rt, mid - l + 1, r - mid);
    if (L <= mid) update(L, R, k, lson);
    if (R > mid) update(L, R, k, rson);
    pushup(rt);
}

int query(int L, int R , int l, int r, int rt) {
    if (L > R) return 0;
    if (L <= l && r <= R) {
        return sum[rt];
    }
    int mid = (l + r) >> 1;
    pushdown(rt, mid - l + 1, r - mid );
    int ans = 0;
    if (L <= mid) ans += query(L, R, lson);
    if (R > mid) ans += query(L, R, rson);
    pushup(rt);
    return ans;
}

bool check(int x) {
    memset(sum, 0, sizeof(sum));
    memset(lazy, -1, sizeof(lazy));
    for (int i = 1; i <= n; ++i)
        b[i] = (a[i] >= x ? 1 : 0);//, cout << b[i] << " "; printf("\n");
    build(root);
    for (int i = 1; i <= m; ++i) {
        int size = query(S[i], T[i], root);
        if (is_up_down[i]) {
            if(size)
                update(S[i], S[i] + size - 1, 1, root);
            if(size!=(T[i]-S[i]+1))
                update(S[i] + size, T[i], 0, root);
        } else {
            if(size!=(T[i]-S[i]+1))
                update(S[i], T[i] - size, 0, root);
            if(size)
                update(T[i] - size + 1, T[i], 1, root);
        }
        // printf("debug\n");
        // if(is_up_down[i])
        //  printf("%d -> %d\n", S[i], T[i]);
        // else
        //  printf("%d <- %d\n", S[i], T[i]);
        // printf("size=%d\n", size);
        // if (is_up_down[i]) {
        //  printf("%d %d %d\n", S[i], S[i] + size - 1, 1);
        //  printf("%d %d %d\n", S[i] + size, T[i], 0);
        // } else {
        //  printf("%d %d %d\n", S[i], T[i] - size, 0);
        //  printf("%d %d %d\n", T[i] - size + 1, T[i], 1);
        // }
        // printf("become\n");
        // for (int i = 1; i <= n; ++i)
        //     printf("%d ", query(i, i, root));
        // printf("\n");
    }
    // printf("debug1 all=%d\n", query(1, n, root));
    return query(k, k, root);
}

int main() {
    //freopen("a.in", "r", stdin);
    n = read(), m = read();
    for (int i = 1; i <= n; ++i) {
        a[i] = read();
    }
    for (int i = 1; i <= m; ++i) {
        is_up_down[i] = read(), S[i] = read(), T[i] = read();
        if(S[i] > T[i]) swap(S[i],T[i]);
    }
    k = read();
    int l = 0, r = 1e7, ans = 0;
    while (l <= r) {
        int mid = (l + r) >> 1;
        if (check(mid)) ans = mid, l = mid + 1;
        else r = mid - 1;
    }
    printf("%d\n", ans);
    return 0;
}

bzoj 4552

标签：print   amp   ring   mat   efi   uil   pushd   for   char s   

原文地址：https://www.cnblogs.com/lovedsr/p/9745982.html