제출 #377619

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
377619		Aldas25	Cutting a rectangle (LMIO18_staciakampis)	C++14	0 / 100	1 ms	364 KiB

staciakampis

#pragma GCC optimize("O3")

#include <bits/stdc++.h>

using namespace std;

#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define pb push_back
#define f first
#define s second
typedef long double ld;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, pii> piii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<piii> viii;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int MAXN = 500100, MAXK = 23;
const ll MOD = 1e9+7;
const ll INF = 1e16;
const ld PI = asin(1) * 2;

void setIO () {
    FAST_IO;
}

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

int n;
ll a[MAXN], b[MAXN];
vl ans;

int main() {
	setIO();

    cin >> n;
    FOR(i, 1, n) cin >> a[i] >> b[i];

    ll sum = 0;
    FOR(i ,1, n) sum += a[i]*b[i];

    ans.pb(1);

    if (sum > 2 && sum%2 == 0) {
        if (a[n] == sum/2)
            ans.pb(2);
    }

    cout << (int)ans.size() << "\n";
    for (ll x : ans) cout << x << "\n";

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

staciakampis.cpp: In function 'void setIO(std::string)':
staciakampis.cpp:34:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   34 |   freopen((s+".in").c_str(),"r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
staciakampis.cpp:35:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   35 |  freopen((s+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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