제출 #33949

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
33949		mohammad_kilani	수열 (APIO14_sequence)	C++14	0 / 100	2000 ms	2796 KiB

sequence

#include <bits/stdc++.h>
using namespace std;
#define mod 1000000007
#define oo 2000000000
const int N = 100010;
int n , k , arr[N] , sum[N];

long long solve2(vector<int> &v,int j){
	if(j == k) return 0;
	long long cur = 0 ;
	int last = 0 ;
	int k = 1;
	for(int i=0;i<v.size();i++){
		while(k <= v[i]){
			long long f = sum[k] - sum[last];
			long long s = sum[v[i]] - sum[k];
			long long num = f * s;
			vector<int> v2;
			bool in = false;
			for(int l=0;l<v.size();l++){
				if(in == false && k < v[l]){
					in = true;
					v2.push_back(k);
				}
				v2.push_back(v[l]);
			}
			cur = max(cur,num + solve2(v2,j+1));
			k++;
		}
		last = v[i];
	}
	return cur;

}

long long solve(vector<int> &v,int j){
	if(j == k) return 0;
	long long cur = 0 ;
	int k = 1;
	int idx = 0 ;
	int last = 0 ;
	for(int i=0;i<v.size();i++){
		while(k <= v[i]){
			long long f = sum[k] - sum[last];
			long long s = sum[v[i]] - sum[k];
			long long num = f * s;
			if(num > cur){
				cur = num;
				idx = k;
			}
			k++;
		}
		last = v[i];
	}
	v.push_back(idx);
	sort(v.begin(),v.end());
	return cur + solve(v,j+1);
}

int main() {
	//freopen("in.txt","r",stdin);
	scanf("%d%d",&n,&k);
	for(int i=1;i<=n;i++){
		scanf("%d",&arr[i]);
		sum[i] = sum[i-1] + arr[i];
	}
	vector<int> v;
	v.push_back(n);
	cout << solve2(v,0) << endl;;
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In function 'long long int solve2(std::vector<int>&, int)':
sequence.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
               ^
sequence.cpp:20:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int l=0;l<v.size();l++){
                 ^
sequence.cpp: In function 'long long int solve(std::vector<int>&, int)':
sequence.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
               ^
sequence.cpp: In function 'int main()':
sequence.cpp:62:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&k);
                     ^
sequence.cpp:64:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&arr[i]);
                      ^

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