Submission #523729

#	Time	Username	Problem	Language	Result	Execution time	Memory
523729		mansur	Boat (APIO16_boat)	C++17	9 / 100	1 ms	204 KiB

boat

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
#define int long long
 
const int inf = 1e15, N = 5e3 + 1, mod = 1e9 + 7;                    

double eps = 1e-6;

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

main() {                                                         
	//freopen("F.in", "r", stdin);                                                                                     
	//freopen("F.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                	                                                       
	cin.tie(NULL);
	int n;
	cin >> n;
	int a[n + 1], b[n + 1];
	bool ok = 1;
	for (int i = 1; i <= n; i++) {
		cin >> a[i] >> b[i];
		if (a[i] != b[i]) ok = 0;
	}	
	if (ok) {
		int dp[n + 1], ans = 0;
		dp[0] = 1;
		a[0] = 0;
		for (int i = 1; i <= n; i++) {
			dp[i] = 0;
			for (int j = 0; j < i; j++) {
				if (a[j] < a[i]) {
					dp[i] = (dp[i] + dp[j]) % mod;
				}
			}
			ans = (ans + dp[i]) % mod;
		}
		cout << ans;
	}
}
                                                                           

Compilation message (stderr)

boat.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
boat.cpp:36:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   36 | main() {
      | ^~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42