제출 #40624

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
40624		Hassoony	Studentsko (COCI14_studentsko)	C++14	0 / 100	1 ms	456 KiB

studentsko

#include<bits/stdc++.h>
#include<unordered_map>
using namespace std;
typedef unsigned long long ll;
typedef double D;
const ll inf=(1ll<<61);
const ll mod=1e9+7;
const int MX=5009;
int n,k,a[MX],dp[MX][MX];
int DP(int x,int y){
    if(x==n)return 0;
    int &ret=dp[x][y];if(ret!=-1)return ret;
    ret=DP(x+1,y);
    if(a[x]>=y)ret=max(ret,DP(x+1,a[x])+1);
    return ret;
}
map<int,int>hashy;
int main(){
    scanf("%d%d",&n,&k);
    for(int i=0;i<n;i++)scanf("%d",&a[i]),hashy[a[i]]=1;
    int tt=1,j=1;
    for(auto pp:hashy){
        hashy[pp.first]=tt;
        if(j%k==0)++tt;
        j++;
    }
    for(int i=0;i<n;i++)a[i]=hashy[a[i]];
    memset(dp,-1,sizeof(dp));
    printf("%d\n",n-DP(0,0));
}

컴파일 시 표준 에러 (stderr) 메시지

studentsko.cpp: In function 'int main()':
studentsko.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
                        ^
studentsko.cpp:20:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=0;i<n;i++)scanf("%d",&a[i]),hashy[a[i]]=1;
                                                        ^

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