Submission #1099072

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099072		RiverFlow	Building Skyscrapers (CEOI19_skyscrapers)	C++14	0 / 100	9 ms	1372 KiB

skyscrapers

#include <bits/stdc++.h>

#define nl "\n"
#define no "NO"
#define yes "YES"
#define fi first
#define se second
#define vec vector
#define task "main"
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)
#define unq(x) sort(all(x)); x.resize(unique(all(x)) - x.begin())

using namespace std;

template<typename U, typename V> bool maxi(U &a, V b) {
    if (a < b) { a = b; return 1; } return 0;
}
template<typename U, typename V> bool mini(U &a, V b) {
    if (a > b) { a = b; return 1; } return 0;
}

const int N = (int)2e5 + 9;
const int mod = (int)1e9 + 7;

void prepare(); void main_code();

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    const bool MULTITEST = 0; prepare();
    int num_test = 1; if (MULTITEST) cin >> num_test;
    while (num_test--) { main_code(); }
}

void prepare() {};

int n;
ii a[N];

namespace SUB1 {
bool vis[N];
void sol() {
    map<ii, int> mp;
    sort(a + 1, a + n + 1);
    FOR(i, 1, n) mp[a[i]]=i;
    // sort theo a[i].first
    #define T pair<ii, int>
    priority_queue<T, vec<T>, greater<T>> pq;
    vec<int> res;
    pq.push(_mp(a[1], 1));
    vis[1]=1;
    while (!pq.empty()) {
        auto fx = pq.top();
        pq.pop();
        int u = fx.se;
//        cerr << u << nl;
        res.push_back(u);
        int x=fx.fi.fi;
        int y=fx.fi.se;
        FOR(a,-1,1)
        FOR(b,-1,1){
            int u=x+a;
            int v=y+b;
            if (mp[_mp(u,v)]>0){
                int k=mp[_mp(u,v)];
                if (!vis[k]){
                    vis[k]=1;
                    pq.push(_mp(_mp(u,v),k));
                }
            }
        }
    }
    if(sz(res)!=n)
        evoid("NO");
    cout << yes << nl;
    for(int x : res) cout << x << nl;
}
};

void main_code() {
    int t;
    cin >> n >> t;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i].fi >> a[i].se;
    }

    if (t == 1) {
        return SUB1::sol(), void();
    }
}


/*     Let the river flows naturally     */

Compilation message (stderr)

skyscrapers.cpp: In function 'int main()':
skyscrapers.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
skyscrapers.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 12
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 10
• Subtask 7: 0 / 19