oj.uz

Submission #1105959

# Submission time Handle Problem Language Result Execution time Memory
1105959 2024-10-28T15:25:04 Z coolsentenceidontremember Regions (IOI09_regions) C++17
32 / 100
 2799 ms 76360 KB 
/*


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*/



#include "bits/stdc++.h"
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pii pair<int, int>
#define mp make_pair

using namespace std;

void setIO(string s = ""){
 ios_base::sync_with_stdio(false);
 cin.tie(nullptr);
 cout.tie(nullptr);
 if (!s.empty()){
	freopen((s+".in").c_str(), "r", stdin);
	freopen((s+".out").c_str(), "w", stdout);
	}
}



struct chash {
	const double PI = acos(-1);
	const uint64_t C = (2e18 * PI)+71;
	const uint32_t random = chrono::steady_clock::now().time_since_epoch().count();
	size_t operator()(ll x) const {
		return __builtin_bswap64((x^random)*C);
	} 
};



const int N = 2e5;
const int R = 25000;
int big_region_id[R];
int reg[N];
int region_cnt[R];
int precalc[505][R];
vector<int> adj[N];
int timer = 0;
vector<int> region_node[R];
int from[N], to[N];
vector<int> in_reg[R];
void dfs_precalc(int u, int p, int cnt, const int &pRegion){
	int cur_reg = reg[u];
	if (cur_reg == pRegion) {
	//	cout << u << ' ' << pRegion << ' ' << '\n';
		cnt++;
	}
	precalc[big_region_id[pRegion]][cur_reg] += cnt;
	int tmp = (cur_reg == pRegion);
	for (const int &v : adj[u]){
		if (v != p) dfs_precalc(v, u, cnt, pRegion);
	}
}

void dfs(int u, int p){
	from[u] = ++timer;
	region_node[reg[u]].push_back(timer);
	in_reg[reg[u]].push_back(u);
	for (const int &v : adj[u]){
		if (v != p) dfs(v, u);
	}
	to[u] = timer;
}

int main(){
	setIO();
    int n, r, q;
    cin >> n >> r >> q;
    int big = sqrt(n) + 1;
    memset(big_region_id, -1, sizeof big_region_id);
    memset(region_cnt, 0, sizeof region_cnt);
    memset(precalc, 0, sizeof precalc);
    int first_reg;
    cin >> first_reg;
    reg[0] = --first_reg;
    region_cnt[first_reg]++;
    for (int i = 1; i < n; i++){
    	int p, rr;
    	cin >> p >> rr;
    	adj[p-1].push_back(i);
    	reg[i] = --rr;
    	region_cnt[rr]++;
	}
	int cnt = 0;
	for (int i = 0; i < r; i++){
		if (region_cnt[i] >= big) big_region_id[i] = cnt++;
	}
	for (int i = 0; i < r; i++){
		if (big_region_id[i] != -1) dfs_precalc(0, 0, 0, i);
	}
	for (int i = 0; i < cnt; i++){
		for (int j = 0;j < r; j++) cout << precalc[i][j] << '\n';
	}
	dfs(0, 0);
	for (int i = 1; i <= q; i++){
		int r1, r2;
		cin >> r1 >> r2;
		r1--; r2--;
		if (big_region_id[r1] != -1) cout << precalc[big_region_id[r1]][r2];
		else {
			int ans = 0;
			for (const int &u : in_reg[r1]){
				//cout << u << ' ';
				ans += (upper_bound(region_node[r2].begin(), region_node[r2].end(), to[u]) - lower_bound(region_node[r2].begin()
				,region_node[r2].end(), from[u]));
			}
			cout << ans;
		}
		cout << endl;
	}
	//for (int i = 0; i < r; i++)cout << big_region_id[i] << ' ';
}

Compilation message

regions.cpp: In function 'void dfs_precalc(int, int, int, const int&)':
regions.cpp:174:6: warning: unused variable 'tmp' [-Wunused-variable]
  174 |  int tmp = (cur_reg == pRegion);
      |      ^~~
regions.cpp: In function 'void setIO(std::string)':
regions.cpp:138:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  138 |  freopen((s+".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regions.cpp:139:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |  freopen((s+".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 58192 KB Output isn't correct
2 Correct 9 ms 58192 KB Output is correct
3 Correct 10 ms 58192 KB Output is correct
4 Correct 11 ms 58192 KB Output is correct
5 Correct 15 ms 58192 KB Output is correct
6 Correct 20 ms 58192 KB Output is correct
7 Correct 29 ms 58192 KB Output is correct
8 Correct 35 ms 58192 KB Output is correct
9 Correct 49 ms 58448 KB Output is correct
10 Correct 71 ms 58448 KB Output is correct
11 Correct 92 ms 58704 KB Output is correct
12 Correct 120 ms 59216 KB Output is correct
13 Correct 150 ms 58704 KB Output is correct
14 Runtime error 83 ms 59216 KB Execution killed with signal 13
15 Runtime error 101 ms 62500 KB Execution killed with signal 13

Subtask #2
20.0 / 85.0

# Verdict Execution time Memory Grader output
1 Runtime error 886 ms 62204 KB Execution killed with signal 13
2 Runtime error 1057 ms 60804 KB Execution killed with signal 13
3 Runtime error 1420 ms 64156 KB Execution killed with signal 13
4 Correct 243 ms 59472 KB Output is correct
5 Correct 316 ms 60964 KB Output is correct
6 Execution timed out 82 ms 59828 KB Time limit exceeded (wall clock)
7 Execution timed out 96 ms 60280 KB Time limit exceeded (wall clock)
8 Execution timed out 111 ms 65608 KB Time limit exceeded (wall clock)
9 Correct 1777 ms 65876 KB Output is correct
10 Execution timed out 172 ms 69036 KB Time limit exceeded (wall clock)
11 Correct 2799 ms 65236 KB Output is correct
12 Execution timed out 60 ms 64360 KB Time limit exceeded (wall clock)
13 Execution timed out 54 ms 64764 KB Time limit exceeded (wall clock)
14 Execution timed out 188 ms 63816 KB Time limit exceeded (wall clock)
15 Execution timed out 45 ms 68680 KB Time limit exceeded (wall clock)
16 Execution timed out 57 ms 76360 KB Time limit exceeded (wall clock)
17 Execution timed out 122 ms 75016 KB Time limit exceeded (wall clock)