제출 #1147222

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
1147222	2025-02-07 18:18:21	mertbbm	Boat (APIO16_boat)	C++20	100 / 100	1134 ms	24472 KiB

boat

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#include <bits/stdc++.h>
using namespace std;
 
#define int long long 
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<int,int>pii;
typedef pair<pii,int>pi2;
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
const int mod=1e9+7;
int f(int a, int b){
  if(a==1||b==0) return 1;
  if(b==1) return a;
  int hold=f((a*a)%mod,b/2);
  if(b%2) hold=(hold*a)%mod;
  return hold; 
}
unordered_map<int,int>mp[505];
int inv[505];
int f2(int n, int k){
  if(n==0) return 0;
  if(mp[k].find(n)!=mp[k].end()) return mp[k][n];
  int hold=1;
  for(int x=n;x<=n+k;x++){
    hold=(hold*x)%mod;
 
 
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컴파일 시 표준 에러 (stderr) 메시지

boat.cpp: In function 'void solve()':
boat.cpp:59:23: warning: iteration 504 invokes undefined behavior [-Waggressive-loop-optimizations]
   59 |                 inv[x]=f(x,mod-2);
      |                 ~~~~~~^~~~~~~~~~~
boat.cpp:58:22: note: within this loop
   58 |         for(int x=1;x<=505;x++){
      |                     ~^~~~~

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 27 / 27
• Subtask 4: 42 / 42