oj.uz

답안 #842691

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
842691 2023-09-03T08:48:40 Z vjudge1 Growing Trees (BOI11_grow) C++17
90 / 100
 1000 ms 5328 KB 
#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 l = 1;
    int r = n;
    int res = n+1;
    while(l <= r) {
        int mid = l + r >> 1;
        if(get(mid,mid) >= x) {
            res = mid;
            r = mid-1;
        }
        else {
            l = mid+1;
        }
    }
    return res;
}

int UP(int x) {
    int l = 1;
    int r = n;
    int res = n+1;
    while(l <= r) {
        int mid = l + r >> 1;
        if(get(mid,mid) > x) {
            res = mid;
            r = mid-1;
        }
        else {
            l = mid+1;
        }
    }
    return res;
}

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();
//    for(int i = 1 ; i <= n ; i++) {
//        cout << a[i] << " ";
//    }
//    cout << '\n';
    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

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)':
grow.cpp:68:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   68 |         int mid = l + r >> 1;
      |                   ~~^~~
grow.cpp: In function 'int UP(int)':
grow.cpp:85:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   85 |         int mid = l + r >> 1;
      |                   ~~^~~
grow.cpp: In function 'int main()':
grow.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen("solve.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
grow.cpp:101:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  101 |         freopen("solve.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 475 ms 3676 KB Output is correct
2 Correct 665 ms 5328 KB Output is correct
3 Correct 245 ms 4944 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2392 KB Output is correct
2 Correct 9 ms 2392 KB Output is correct
3 Correct 9 ms 2396 KB Output is correct
4 Correct 6 ms 2392 KB Output is correct
5 Correct 276 ms 3632 KB Output is correct
6 Correct 370 ms 3664 KB Output is correct
7 Correct 19 ms 2648 KB Output is correct
8 Correct 228 ms 3156 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 353 ms 2888 KB Output is correct
2 Correct 353 ms 3972 KB Output is correct
3 Correct 5 ms 2392 KB Output is correct
4 Correct 297 ms 3492 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 333 ms 3156 KB Output is correct
2 Correct 388 ms 3824 KB Output is correct
3 Correct 41 ms 2648 KB Output is correct
4 Correct 347 ms 4048 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 475 ms 2940 KB Output is correct
2 Correct 645 ms 4592 KB Output is correct
3 Correct 85 ms 3152 KB Output is correct
4 Correct 205 ms 4688 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 548 ms 3408 KB Output is correct
2 Correct 616 ms 4688 KB Output is correct
3 Correct 243 ms 4832 KB Output is correct
4 Correct 85 ms 3156 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 532 ms 3408 KB Output is correct
2 Correct 490 ms 4724 KB Output is correct
3 Correct 243 ms 4944 KB Output is correct
4 Correct 83 ms 3112 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 681 ms 3380 KB Output is correct
2 Correct 661 ms 3408 KB Output is correct
3 Correct 86 ms 3928 KB Output is correct
4 Correct 600 ms 4824 KB Output is correct

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 633 ms 3612 KB Output is correct
2 Correct 666 ms 4964 KB Output is correct
3 Execution timed out 1018 ms 5200 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 573 ms 3920 KB Output is correct