oj.uz

Submission #1044020

# Submission time Handle Problem Language Result Execution time Memory
1044020 2024-08-05T06:25:15 Z 김은성(#11005) Prize (CEOI22_prize) C++17
10 / 100
 483 ms 201484 KB 
#include <bits/stdc++.h>
using namespace std;
vector<int> graph[1000009];
int par[1000009], level[1000009], depth[1000009], sp[21][1000009];
vector<int> vec;
void dfs(int v){
	vec.push_back(v);
	for(int u: graph[v]){
		level[u] = level[v] + 1;
		dfs(u);
	}
}
int lca(int u, int v){
	if(level[u] > level[v])
		swap(u, v);
	int i;
	for(i=19; i>=0; i--){
		if(level[v] - level[u] >= (1<<i))
			v = sp[i][v];
	}
	for(i=19; i>=0; i--){
		if(sp[i][v] == sp[i][u])
			continue;
		v = sp[i][v];
		u = sp[i][u];
	}
	if(u != v){
		u = par[u];
		v = par[v];
	}
	return u;
}
int main(){
	int n, k, q, t, i, root;
	scanf("%d %d %d %d", &n, &k, &q, &t);
	for(i=1; i<=n; i++)
		scanf("%d", &par[i]);
	for(i=1; i<=n; i++){
		scanf("%d", &par[i]);
		if(par[i] == -1)
			root = i;
		else
			graph[par[i]].push_back(i);
	}
	dfs(root);
	vector<int> crit;
	for(i=1; i<=n; i++)
		sp[0][i] = par[i];
	for(i=1; i<=19; i++){
		for(int j=1; j<=n; j++){
			sp[i][j] = (sp[i-1][j]==-1 ? -1 : sp[i-1][sp[i-1][j]]);
		}
	}
	for(i=0; i<k; i++){
		crit.push_back(vec[i]);
	}
	for(i=0; i<k; i++)
		printf("%d ", crit[i]);
	printf("\n");
	for(i=1; i<k; i++)
		printf("? %d %d\n", crit[0], crit[i]);
	printf("!\n");
	fflush(stdout);
	for(i=1; i<k; i++){
		scanf("%*d %d %*d %*d", &depth[crit[i]]);
	}
	vector<pair<int, int> > query(t);
	for(i=0; i<t; i++){
		scanf("%d %d", &query[i].first, &query[i].second);
	}
	for(i=0; i<t; i++){
		//printf("lca=%d\n", lca(query[i].first, query[i].second));
		printf("%d %d\n", depth[query[i].first] + depth[query[i].second] - 2*depth[lca(query[i].first, query[i].second)],
		depth[query[i].first] + depth[query[i].second] - 2*depth[lca(query[i].first, query[i].second)]);
	}
	fflush(stdout);
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |  scanf("%d %d %d %d", &n, &k, &q, &t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:37:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |   scanf("%d", &par[i]);
      |   ~~~~~^~~~~~~~~~~~~~~
Main.cpp:39:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |   scanf("%d", &par[i]);
      |   ~~~~~^~~~~~~~~~~~~~~
Main.cpp:65:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |   scanf("%*d %d %*d %*d", &depth[crit[i]]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:69:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |   scanf("%d %d", &query[i].first, &query[i].second);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:45:5: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
   45 |  dfs(root);
      |  ~~~^~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 358 ms 157972 KB Output is correct
2 Correct 402 ms 156976 KB Output is correct
3 Correct 235 ms 126908 KB Output is correct
4 Correct 237 ms 126944 KB Output is correct
5 Correct 245 ms 125916 KB Output is correct
6 Correct 351 ms 133376 KB Output is correct
7 Correct 396 ms 133760 KB Output is correct
8 Correct 329 ms 133424 KB Output is correct
9 Correct 250 ms 127052 KB Output is correct
10 Correct 282 ms 127244 KB Output is correct
11 Correct 278 ms 126720 KB Output is correct
12 Correct 307 ms 127128 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Runtime error 244 ms 156720 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Runtime error 183 ms 156744 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Runtime error 461 ms 200092 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Runtime error 483 ms 201484 KB Execution killed with signal 13
2 Halted 0 ms 0 KB -