Submission #605222

#	Time	Username	Problem	Language	Result	Execution time	Memory
605222		1bin	Untitled (POI11_kon)	C++14	100 / 100	1527 ms	117180 KiB

Main

#include <bits/stdc++.h>
 
using namespace std;
 
#define all(v) v.begin(), v.end()
typedef long long ll;
const int NMAX = 1e5 + 5;
int n, deg[NMAX], cnt[NMAX], ans, x, a, b;

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    
    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> deg[i]; cnt[deg[i]]++; b += deg[i];
        for(int j = 0; j < deg[i]; j++) cin >> x;
    }
    
    sort(deg, deg + n); x = 0;
    for(int i = n - 1; i; i--){
        a += deg[i]; b -= deg[i]; x++;
        if(a - b == x * (x - 1)){
            if(deg[i] == deg[i - 1]) ans += cnt[deg[i]];
            else ans++;
        }
    }
    cout << ans;
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10