Submission #1099776

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099776		model_code	Nile (IOI24_nile)	C++17	0 / 100	26 ms	4800 KiB

nile

// incorrect/bakry_wa_q1_overflow.cpp

#include <bits/stdc++.h>

using namespace std ;

vector<long long>calculate_costs(vector<int>W, vector<int>A, vector<int>B, vector<int>E) {
	vector< array<int , 3> >ord;
	int n = W.size(), q = E.size();
	for(int i = 0; i < n; ++i)
		ord.push_back({W[i], A[i], B[i]});
	sort(ord.begin(), ord.end());
	for(int i = 0; i < n; ++i)
		W[i] = ord[i][0], A[i] = ord[i][1], B[i] = ord[i][2];
	int d = E[0];
	vector<long long>dp(n+2);
	dp[0] = A[0];
	for(int i = 1; i < n; ++i)
	{
		dp[i] = dp[i-1] + A[i];
		//take i-1
		if(W[i] - W[i-1] <= d)
		{
			if(i == 1)
				dp[i] = min(dp[i], 1ll * B[i] + B[i-1]);
			else
				dp[i] = min(dp[i], B[i] + B[i-1] + dp[i-2]);
		}
		//take i-2
		if(i-2 >= 0 && W[i] - W[i-2] <= d)
		{
			if(i == 2)
				dp[i] = min(dp[i], 1ll * B[i] + B[i-2] + A[i-1]);
			else
				dp[i] = min(dp[i], B[i] + B[i-2] + A[i-1] + dp[i-3]);
		}
	}
	return {dp[n-1]};
}

Compilation message (stderr)

nile.cpp: In function 'std::vector<long long int> calculate_costs(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
nile.cpp:9:20: warning: unused variable 'q' [-Wunused-variable]
    9 |  int n = W.size(), q = E.size();
      |                    ^

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