Submission #200522

#	Time	Username	Problem	Language	Result	Execution time	Memory
200522		arnold518	스트랩 (JOI14_straps)	C++14	100 / 100	173 ms	63780 KiB

straps

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2000;
const ll INF = 1e18;

int N, A[MAXN+10], B[MAXN+10];
ll dp[MAXN+10][MAXN*2+10];

ll solve(int pos, int val)
{
	if(pos==N+1)
	{
		if(val>=-1) return 0;
		else return -INF; 
	}

	ll &ret=dp[pos][val+MAXN];
	if(ret!=-1) return ret;

	ret=-INF;
	ret=max(ret, solve(pos+1, val));
	ret=max(ret, solve(pos+1, min(N, val+A[pos]))+B[pos]);
	return ret;
}

int main()
{
	int i, j;
	scanf("%d", &N);
	for(i=1; i<=N; i++) scanf("%d%d", &A[i], &B[i]), A[i]--;
	memset(dp, -1, sizeof(dp));
	printf("%lld\n", solve(1, 0));
}

Compilation message (stderr)

straps.cpp: In function 'int main()':
straps.cpp:33:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
straps.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
straps.cpp:35:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=1; i<=N; i++) scanf("%d%d", &A[i], &B[i]), A[i]--;
                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 45 / 45
• Subtask 4: 45 / 45