Submission #842699

#	Time	Username	Problem	Language	Result	Execution time	Memory
842699		vjudge1	Growing Trees (BOI11_grow)	C++17	0 / 100	84 ms	3876 KiB

grow

#include <bits/stdc++.h>
#define ll long long
#define ld long double

using namespace std;

const int N = 1e5+10;
const int INF = INT_MAX;
const int mod = 1e9+7;

int n,q,a[N];
int tree[4*N],lazy[4*N];

void build(int id = 1, int l = 1, int r = n) {
    if(l == r) {
        tree[id] = a[l];
        return;
    }
    int mid = l + r >> 1;
    build(id << 1,l,mid);
    build(id << 1 | 1,mid+1,r);
    tree[id] = max(tree[id << 1],tree[id << 1 | 1]);
}

void down(int id, int l, int r) {
    int t = lazy[id];
    tree[id] += t;
    if(l < r) {
        lazy[id << 1] += t;
        lazy[id << 1 | 1] += t;
    }
    lazy[id] = 0;
}

void update(int u, int v, int val, int id = 1, int l = 1, int r = n) {
    down(id,l,r);
    if(l > r || u > v || r < u || v < l) {
        return;
    }
    if(u <= l && r <= v) {
        lazy[id] = val;
        down(id,l,r);
        return;
    }
    int mid = l + r >> 1;
    update(u,v,val,id << 1,l,mid);
    update(u,v,val,id << 1 | 1,mid+1,r);
    tree[id] = max(tree[id << 1],tree[id << 1 | 1]);
}

int get(int u, int v, int id = 1, int l = 1, int r = n) {
    down(id,l,r);
    if(l > r || u > v || r < u || v < l) {
        return 0;
    }
    if(u <= l && r <= v) {
        return tree[id];
    }
    int mid = l + r >> 1;
    return max(get(u,v,id << 1,l,mid),get(u,v,id << 1 | 1,mid+1,r));
}

int LOW(int x, int id = 1, int l = 1, int r = n) {
    down(id,l,r);
    if(id == 1 && tree[id] < x) {
        return n+1;
    }
    if(l == r) {
        return l;
    }
    int mid = l + r >> 1;
    if(tree[id << 1] >= x) {
        return LOW(x,id << 1,l,mid);
    }
    return LOW(x,id << 1 | 1,mid+1,r);
}

int UP(int x, int id = 1, int l = 1, int r = n) {
    down(id,l,r);
    if(id == 1 && tree[id] <= x) {
        return n+1;
    }
    if(l == r) {
        return l;
    }
    int mid = l + r >> 1;
    if(tree[id << 1] > x) {
        return UP(x,id << 1,l,mid);
    }
    return UP(x,id << 1 | 1,mid+1,r);
}

signed main()
{
    if (fopen("solve.inp", "r")) {
        freopen("solve.inp", "r", stdin);
        freopen("solve.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> q;
    for(int i = 1 ; i <= n ; i++) {
        cin >> a[i];
    }
    sort(a+1,a+n+1);
    build();
    while(q--) {
        char c; cin >> c;
        int x,y; cin >> x >> y;
        if(c == 'F') {
            int l = LOW(y);
            if(l+x-1 >= n) {
                update(l,n,1);
                continue;
            }
            int tmp = get(l+x-1,l+x-1);
            int r = UP(tmp)-1;
            tmp = LOW(tmp);
            x -= tmp-l;
            update(l,tmp-1,1);
            update(r-x+1,r,1);
        }
        else {
            cout << UP(y) - LOW(x) << '\n';
        }
    }
    return 0;
}

Compilation message (stderr)

grow.cpp: In function 'void build(int, int, int)':
grow.cpp:19:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   19 |     int mid = l + r >> 1;
      |               ~~^~~
grow.cpp: In function 'void update(int, int, int, int, int, int)':
grow.cpp:45:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |     int mid = l + r >> 1;
      |               ~~^~~
grow.cpp: In function 'int get(int, int, int, int, int)':
grow.cpp:59:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   59 |     int mid = l + r >> 1;
      |               ~~^~~
grow.cpp: In function 'int LOW(int, int, int, int)':
grow.cpp:71:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   71 |     int mid = l + r >> 1;
      |               ~~^~~
grow.cpp: In function 'int UP(int, int, int, int)':
grow.cpp:86:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   86 |     int mid = l + r >> 1;
      |               ~~^~~
grow.cpp: In function 'int main()':
grow.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen("solve.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
grow.cpp:97:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |         freopen("solve.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10