제출 #538228

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
538228		idas	Cutting a rectangle (LMIO18_staciakampis)	C++11	0 / 100	1097 ms	46368 KiB

staciakampis

#include <bits/stdc++.h>
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr)
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()
#define all(x) (x).begin(), (x).end()
#define le(vec) vec[vec.size()-1]
#define sz(x) ((int)((x).size()))
#define pb push_back
#define s second
#define f first

using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef map<int, int> mii;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;

const int INF=1e9, MOD=1e9+7, mod=998244353;
const ll LINF=1e13;

void setIO()
{
    FAST_IO;
}

void setIO(string s)
{
    FAST_IO;
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

#define int long long

const int N=1e5+10;
int n, a[N], b[N];
vector<pii> inf;
ll area;

bool can(int x, int y)
{
    if(x*y!=area) return false;

    map<int, set<pii, greater<pii>>> ar, br;
    FOR(i, 0, n)
    {
        ar[inf[i].f].insert({inf[i].s, i});
        br[inf[i].s].insert({inf[i].f, i});
    }

    map<int, bool> v;
    while(x>0 && y>0){
        while(!ar[x].empty() && v[pii(*ar[x].begin()).s]) ar[x].erase(ar[x].begin());
        while(!br[x].empty() && v[pii(*br[x].begin()).s]) br[x].erase(br[x].begin());
        while(!ar[y].empty() && v[pii(*ar[y].begin()).s]) ar[y].erase(ar[y].begin());
        while(!br[y].empty() && v[pii(*br[y].begin()).s]) br[y].erase(br[y].begin());

        if(x<y) swap(x, y);

        if(sz(ar[x])){
            pii tp=*ar[x].begin();
            v[tp.s]=true;
            y-=tp.f;
            ar[x].erase(ar[x].begin());
            continue;
        }

        if(sz(ar[y])){
            pii tp=*ar[y].begin();
            v[tp.s]=true;
            x-=tp.f;
            ar[y].erase(ar[y].begin());
            continue;
        }

//        if(sz(br[x])){
//            pii tp=br[x].top();
//            v[tp.s]=true;
//            y-=tp.f;
//            br[x].pop();
//            continue;
//        }

        if(sz(br[y])){
            pii tp=*br[y].begin();
            v[tp.s]=true;
            x-=tp.f;
            br[y].erase(br[y].begin());
            continue;
        }

        return false;
    }

    return true;
}

signed main()
{
    setIO();
    cin >> n;
    FOR(i, 0, n)
    {
        cin >> a[i] >> b[i];
        inf.pb({a[i],b[i]});
        area+=a[i]*b[i];
    }

    set<int> ans;

    for(ll i=1; i*i<=area; i++){
        if(area%i==0){
            ll x=i, y=area/x;
            if(can(x, y)){
                ans.insert(x);
            }
        }
    }

    cout << sz(ans) << '\n';
    for(auto x : ans){
        cout << x << '\n';
    }
}

컴파일 시 표준 에러 (stderr) 메시지

staciakampis.cpp: In function 'void setIO(std::string)':
staciakampis.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
staciakampis.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 25
• Subtask 2: 0 / 20
• Subtask 3: 0 / 55