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답안 #383930

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
383930 2021-03-31T03:30:00 Z nikatamliani Examination (JOI19_examination) C++14
100 / 100
 249 ms 23020 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1e5+10;
template <typename T>
struct fenwick_tree {
    int size;
    vector<T> tree;
    T neutral;
    fenwick_tree(int n, T _neutral) {
        size = n;
        neutral = _neutral;
        tree = vector<T>(n + 1);
    }
 
    void update(int index, T value) {
        for(; index <= size; index += index & -index) {
            tree[index] += value;
        }
    }
    T query_prefix(int index) {
        T ans = neutral;
        for(; index; index -= index & -index) {
            ans += tree[index];
        }
        return ans; 
    }
    T query(int l, int r) {
        return query_prefix(r) - query_prefix(l - 1);
    }
};
map<int, int> compress(vector<int> &coords) {
	sort(coords.begin(), coords.end());
	map<int, int> compressed;
	for(int i = 0, current = 0; i < (int)coords.size(); ++i) {
		if(i == 0 || coords[i] != coords[i - 1]) ++current;
		compressed[coords[i]] = current;
	}
	return compressed;
}
struct point {
	int x, y, sum;
	bool operator < (const point &other) {
		if(x == other.x) {
			return y < other.y;
		}
		return x < other.x;
	}
};
point a[N], b[N];
void compress(vector<int*> &coords) {
	sort(coords.begin(), coords.end(), [&](const int* x, const int* y) {
		return *x < *y;
	});
	int prev = -1;
	for(int i = 0, current = 0; i < (int)coords.size(); ++i) {
		if(prev != *coords[i]) {
			++current;
		}
		prev = *coords[i];
		*coords[i] = current;
	}
}
int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	int n, m;
	cin >> n >> m; 
	vector<vector<int>> v;
	vector<int> sorted_sums;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i].x >> a[i].y;
		a[i].sum = a[i].x + a[i].y;
		sorted_sums.push_back(a[i].sum);
	}
	sort(sorted_sums.begin(), sorted_sums.end());
	sort(a + 1, a + n + 1);
	for(int i = 1; i <= m; ++i) {
		cin >> b[i].x >> b[i].y >> b[i].sum;
		b[i].sum = max(b[i].sum, b[i].x + b[i].y);
	}
	vector<int> ans(m+1);
	for(int i = 1; i <= m; ++i) {
		int l = 0, r = n - 1, ind = n;
		while(r >= l) {
			int middle = l + r >> 1;
			if(sorted_sums[middle] >= b[i].sum) {
				r = middle - 1;
				ind = middle;
			} else {
				l = middle + 1;
			}
		}
		ans[i] = n - ind;
	}
	vector<int*> coords(n+m);
	for(int i = 0; i < n + m; ++i) {
		coords[i] = i < n ? &a[i + 1].x : &b[i + 1 - n].x;
	}
	compress(coords);
	for(int i = 0; i < n + m; ++i) {
		coords[i] = i < n ? &a[i + 1].y : &b[i + 1 - n].y;
	}
	compress(coords);
	for(int i = 0; i < n + m; ++i) {
		coords[i] = i < n ? &a[i + 1].sum : &b[i + 1 - n].sum;
	}
	compress(coords);
	fenwick_tree<int> tx(2 * N, 0);
	fenwick_tree<int> ty(2 * N, 0);
	vector<int> sums[2 * N], queries[2 * N];
	for(int i = 1; i <= n; ++i) {
		int val = a[i].sum;
		sums[val].push_back(i); 
	}
	for(int i = 1; i <= m; ++i) {
		int val = b[i].sum;
		queries[val].push_back(i);
	}
	for(int i = 2 * N - 1; i >= 1; --i) {
		for(int id : sums[i]) {
			int val_x = a[id].x;
			int val_y = a[id].y;
			tx.update(val_x, 1); 
			ty.update(val_y, 1);
		}
		for(int id : queries[i]) {
			int val_x = b[id].x;
			int val_y = b[id].y;
			ans[id] -= tx.query_prefix(val_x - 1);
			ans[id] -= ty.query_prefix(val_y - 1);
		}
	}
	for(int i = 1; i <= m; ++i) {
		cout << ans[i] << '\n';
	}
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:84:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   84 |    int middle = l + r >> 1;
      |                 ~~^~~

Subtask #1
2.0 / 2.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11244 KB Output is correct
2 Correct 8 ms 11244 KB Output is correct
3 Correct 8 ms 11244 KB Output is correct
4 Correct 8 ms 11244 KB Output is correct
5 Correct 8 ms 11264 KB Output is correct
6 Correct 8 ms 11244 KB Output is correct
7 Correct 14 ms 11628 KB Output is correct
8 Correct 14 ms 11628 KB Output is correct
9 Correct 14 ms 11628 KB Output is correct
10 Correct 12 ms 11756 KB Output is correct
11 Correct 13 ms 11628 KB Output is correct
12 Correct 14 ms 11500 KB Output is correct
13 Correct 13 ms 11628 KB Output is correct
14 Correct 13 ms 11628 KB Output is correct
15 Correct 14 ms 11628 KB Output is correct
16 Correct 15 ms 11628 KB Output is correct
17 Correct 14 ms 11628 KB Output is correct
18 Correct 11 ms 11500 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 214 ms 21248 KB Output is correct
2 Correct 225 ms 21228 KB Output is correct
3 Correct 227 ms 21228 KB Output is correct
4 Correct 170 ms 20588 KB Output is correct
5 Correct 179 ms 20588 KB Output is correct
6 Correct 105 ms 17644 KB Output is correct
7 Correct 221 ms 20896 KB Output is correct
8 Correct 204 ms 20972 KB Output is correct
9 Correct 180 ms 19820 KB Output is correct
10 Correct 162 ms 20460 KB Output is correct
11 Correct 161 ms 20332 KB Output is correct
12 Correct 85 ms 17264 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 214 ms 21248 KB Output is correct
2 Correct 225 ms 21228 KB Output is correct
3 Correct 227 ms 21228 KB Output is correct
4 Correct 170 ms 20588 KB Output is correct
5 Correct 179 ms 20588 KB Output is correct
6 Correct 105 ms 17644 KB Output is correct
7 Correct 221 ms 20896 KB Output is correct
8 Correct 204 ms 20972 KB Output is correct
9 Correct 180 ms 19820 KB Output is correct
10 Correct 162 ms 20460 KB Output is correct
11 Correct 161 ms 20332 KB Output is correct
12 Correct 85 ms 17264 KB Output is correct
13 Correct 213 ms 21100 KB Output is correct
14 Correct 224 ms 21084 KB Output is correct
15 Correct 216 ms 21228 KB Output is correct
16 Correct 173 ms 20332 KB Output is correct
17 Correct 183 ms 20460 KB Output is correct
18 Correct 106 ms 17644 KB Output is correct
19 Correct 230 ms 21212 KB Output is correct
20 Correct 220 ms 21016 KB Output is correct
21 Correct 222 ms 21228 KB Output is correct
22 Correct 166 ms 20460 KB Output is correct
23 Correct 163 ms 20400 KB Output is correct
24 Correct 87 ms 17208 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11244 KB Output is correct
2 Correct 8 ms 11244 KB Output is correct
3 Correct 8 ms 11244 KB Output is correct
4 Correct 8 ms 11244 KB Output is correct
5 Correct 8 ms 11264 KB Output is correct
6 Correct 8 ms 11244 KB Output is correct
7 Correct 14 ms 11628 KB Output is correct
8 Correct 14 ms 11628 KB Output is correct
9 Correct 14 ms 11628 KB Output is correct
10 Correct 12 ms 11756 KB Output is correct
11 Correct 13 ms 11628 KB Output is correct
12 Correct 14 ms 11500 KB Output is correct
13 Correct 13 ms 11628 KB Output is correct
14 Correct 13 ms 11628 KB Output is correct
15 Correct 14 ms 11628 KB Output is correct
16 Correct 15 ms 11628 KB Output is correct
17 Correct 14 ms 11628 KB Output is correct
18 Correct 11 ms 11500 KB Output is correct
19 Correct 214 ms 21248 KB Output is correct
20 Correct 225 ms 21228 KB Output is correct
21 Correct 227 ms 21228 KB Output is correct
22 Correct 170 ms 20588 KB Output is correct
23 Correct 179 ms 20588 KB Output is correct
24 Correct 105 ms 17644 KB Output is correct
25 Correct 221 ms 20896 KB Output is correct
26 Correct 204 ms 20972 KB Output is correct
27 Correct 180 ms 19820 KB Output is correct
28 Correct 162 ms 20460 KB Output is correct
29 Correct 161 ms 20332 KB Output is correct
30 Correct 85 ms 17264 KB Output is correct
31 Correct 213 ms 21100 KB Output is correct
32 Correct 224 ms 21084 KB Output is correct
33 Correct 216 ms 21228 KB Output is correct
34 Correct 173 ms 20332 KB Output is correct
35 Correct 183 ms 20460 KB Output is correct
36 Correct 106 ms 17644 KB Output is correct
37 Correct 230 ms 21212 KB Output is correct
38 Correct 220 ms 21016 KB Output is correct
39 Correct 222 ms 21228 KB Output is correct
40 Correct 166 ms 20460 KB Output is correct
41 Correct 163 ms 20400 KB Output is correct
42 Correct 87 ms 17208 KB Output is correct
43 Correct 244 ms 22892 KB Output is correct
44 Correct 248 ms 22764 KB Output is correct
45 Correct 249 ms 22892 KB Output is correct
46 Correct 190 ms 22892 KB Output is correct
47 Correct 210 ms 22892 KB Output is correct
48 Correct 104 ms 17516 KB Output is correct
49 Correct 239 ms 22892 KB Output is correct
50 Correct 249 ms 22892 KB Output is correct
51 Correct 241 ms 23020 KB Output is correct
52 Correct 185 ms 22636 KB Output is correct
53 Correct 183 ms 22764 KB Output is correct