Submission #624919

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
624919	2022-08-09 05:41:59	QwertyPi	Boat (APIO16_boat)	C++14	100 / 100	1108 ms	8656 KiB

boat

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#include <bits/stdc++.h>
#define int long long
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("Ofast")
using namespace std;
const int N = 520;
const int M = 1e9 + 7;
int a[N], b[N];
int d[N * 2];
int dp[2][N * 2][N];
int n, m;
int pm(int a, int b){
  if(b == 0) return 1;
  return pm(a * a % M, b / 2) * (b % 2 ? a : 1) % M;
}
int mi(int a){
  return pm(a, M - 2);
}
int inv[N];
int32_t main(){
  cin >> n;
  for(int i = 0; i <= N; i++) inv[i] = mi(i);
  for(int i = 0; i < n; i++){
    cin >> a[i] >> b[i];
  }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

boat.cpp: In function 'int32_t main()':
boat.cpp:27:37: warning: iteration 520 invokes undefined behavior [-Waggressive-loop-optimizations]
   27 |  for(int i = 0; i <= N; i++) inv[i] = mi(i);
      |                              ~~~~~~~^~~~~~~
boat.cpp:27:19: note: within this loop
   27 |  for(int i = 0; i <= N; i++) inv[i] = mi(i);
      |                 ~~^~~~

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