제출 #896609

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
896609	2024-01-01 17:58:11	tsumondai	Fancy Fence (CEOI20_fancyfence)	C++14	100 / 100	23 ms	5976 KiB

fancyfence

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#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define pb push_back
#define pii pair<ll, ll>
#define fi first
#define se second
#define bit(x, i) ((x >> i) & 1)
#define SZ(x) ((int)(x.size()))
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for (int i = (a); i >= (b); --i)
#define task "BRICKWALL"
using namespace std;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { assert(l <= r); return uniform_int_distribution<ll>(l, r)(rd); }
const int MXN = 1e5 + 5;
const int MOD = 1e9 + 7;
const int BASE = 3137;
const int BL = 320;
int n;
int l[MXN], r[MXN], st[MXN], top;
ll pre[MXN], h[MXN], w[MXN], ans;
ll getsum(int l, int r) {
    return (pre[r] - pre[l - 1] + MOD) % MOD;
}
 
 
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컴파일 시 표준 에러 (stderr) 메시지

fancyfence.cpp: In function 'int32_t main()':
fancyfence.cpp:68:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     if (fopen(task".inp", "r")) { freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); }
      |                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
fancyfence.cpp:68:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     if (fopen(task".inp", "r")) { freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); }
      |                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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