oj.uz

Submission #705170

# Submission time Handle Problem Language Result Execution time Memory
705170 2023-03-03T13:28:43 Z Abrar_Al_Samit Simurgh (IOI17_simurgh) C++17
0 / 100
 99 ms 4076 KB 
#include<bits/stdc++.h>
#include "simurgh.h"

using namespace std;

const int nax = 500;
vector<pair<int,int>>g[nax];
int m;
vector<int>stk;
bool vis[nax];
int sz[nax], par[nax];
vector<int>grp[nax];
int where[nax*nax];
int known[nax*nax];
int res[nax*nax];

int find(int v) {
	return par[v] = (v==par[v]) ? v : find(par[v]);
}
void unite(int u, int v) {
	u = find(u), v = find(v);
	if(sz[u]<sz[v]) swap(u, v);
	sz[u] += sz[v];
	par[v] = u;
}
void dfs(int v, int ban) {
	vis[v] = 1;
	for(auto &[c, e] : g[v]) if(c!=ban && !vis[c]) {
		stk.push_back(e);
		unite(v, c);
		dfs(c, ban);
	}
}
vector<int>find_roads(int n, vector<int>u, vector<int>v) {
	m = u.size();

	for(int i=0; i<m; ++i) {
		g[u[i]].emplace_back(v[i], i);
		g[v[i]].emplace_back(u[i], i);
	}

	vector<int>royal;
	for(int ban=0; ban<n; ++ban) {
		stk.clear();
		for(int i=0; i<n; ++i) {
			vis[i] = 0;
			sz[i] = 1, par[i] = i;
			grp[i].clear();
		}
		for(int i=0; i<n; ++i) {
			if(i!=ban && !vis[i]) {
				dfs(i, ban);
			}
		}


		for(auto &[c, e] : g[ban]) {
			grp[find(c)].push_back(e);
		}

		for(int i=0; i<n; ++i) if(!grp[i].empty()) {
			where[grp[i][0]] = stk.size();
			stk.push_back(grp[i][0]);
		}
		for(int i=0; i<n; ++i) if(!grp[i].empty()) {
			int mx = -1, mn = n;

			int pos = where[grp[i][0]];
			for(int x : grp[i]) {
				if(known[x]) continue;
				stk[pos] = x;
				res[x] = count_common_roads(stk);
				mx = max(mx, res[x]);
				mn = min(mn, res[x]);
			}
			if(mx!=mn) {
				for(int x : grp[i]) if(!known[x]) {
					if(res[x]==mx) known[x] = 2;
					else known[x] = 1;
				}
			} else {
				bool something = false;
				for(int x : grp[i]) if(known[x]) {
					something = true;
					stk[pos] = x;
					if(known[x]==1) {
						mn = min(mn, count_common_roads(stk));
					} else {
						mx = max(mx, count_common_roads(stk));
					}
				}

				if(something) {
					for(int x : grp[i]) if(!known[x]) {
						if(res[x]!=mn) known[x] = 2;
						else known[x] = 1;
					}
				} else {
					for(int x : grp[i]) {
						known[x] = 2;
					}
				}
			}			
		}
	}

	for(int i=0; i<m; ++i) if(known[i]==2) {
		royal.push_back(i);
	}

	// for(int x : royal) cerr<<x<<' ';
	// 	cerr<<'\n';
	return royal;
}

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB WA in grader: NO
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB correct
2 Correct 0 ms 340 KB correct
3 Incorrect 99 ms 4076 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB WA in grader: NO
2 Halted 0 ms 0 KB -