Submission #574972

#	Time	Username	Problem	Language	Result	Execution time	Memory
574972		1zaid1	Carnival (CEOI14_carnival)	C++14	20 / 100	508 ms	976 KiB

carnival

#include <bits/stdc++.h>
using namespace std;
// #define endl '\n'
const int M = 2e5+5, MOD = 1000000007;
#define int long long
int rnk[M], clr[M], p[M];

vector<pair<int, int>> nono;

int find(int s) {
    return (s == p[s]?s:p[s]=find(p[s]));
}

void uni(int a, int b) {
    if (rnk[a] < rnk[b]) swap(a, b);
    if (rnk[a] == rnk[b]) rnk[a]++;
    p[b] = a;
}

signed main() {
    cin.tie(0)->sync_with_stdio(0);

    int n;
    cin >> n;

    for (int i = 1; i <= n; i++) clr[i] = p[i] = i;

    for (int i=1;i<=n;i++) {
        for(int j=i+1;j<=n;j++) {
            bool check = 1;
            for (auto [a, b]:nono) {
                int x, y;
                x = find(a), y = find(b);
                int w = find(i), z = find(j);

                if (x > y) swap(x, y);
                if (w > z) swap(w, z);
                if (w==x && z == y) check = 0;
            }

            if (find(i) != find(j) && check) {
                cout << 2 << ' ' << i << ' ' << j << endl;
                int x;
                cin >> x;

                if (x == 1) uni(find(i), find(j));
                else {
                    nono.push_back({find(i), find(j)});
                }
            }
        }
    }

    map<int, int> mp;
    set<int> st;
    for (int i = 1; i <= n; i++) st.insert(find(i));
    int cnt = 1;
    for (int i:st) mp[i] = cnt++;

    cout << 0 << ' ';
    for (int i = 1; i <= n; i++) cout << mp[clr[find(i)]] << ' '; cout << endl;

    return 0;
}
/*
3 
0 3 0
3 0 0
5 4 0

3
1 1 1
3 0 1
4 5 1
*/

Compilation message (stderr)

carnival.cpp: In function 'int main()':
carnival.cpp:31:23: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   31 |             for (auto [a, b]:nono) {
      |                       ^
carnival.cpp:61:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   61 |     for (int i = 1; i <= n; i++) cout << mp[clr[find(i)]] << ' '; cout << endl;
      |     ^~~
carnival.cpp:61:67: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   61 |     for (int i = 1; i <= n; i++) cout << mp[clr[find(i)]] << ' '; cout << endl;
      |                                                                   ^~~~

• Subtask 1: 4 / 20
• Subtask 2: 4 / 20
• Subtask 3: 4 / 20
• Subtask 4: 4 / 20
• Subtask 5: 4 / 20