Submission #404976

#	Time	Username	Problem	Language	Result	Execution time	Memory
404976		Hazem	Bali Sculptures (APIO15_sculpture)	C++14	100 / 100	137 ms	336 KiB

sculpture

#include <bits/stdc++.h>
using namespace std;
 
#define LL long long
#define F first
#define S second
#define pii pair<int,int>
#define piii pair<pair<int,int>,int>

const int N = 2e5+10;
const int M = 3e2+10;
const LL INF = 1e9;
const LL LINF = 2e18;
const LL MOD = 1e9+7;   
const double PI = 3.141592653589793;

LL a[N],dp[N];
bool dp1[M][M];
int n,l,r;

bool check1(LL val){

    dp[0] = 0;
    for(int i=1;i<=n;i++){
        dp[i] = LINF;
        LL sum = 0;
        for(int j=i;j>=1;j--){
            sum += a[j];
            if((sum&val)==sum)
                dp[i] = min(dp[i],dp[j-1]+1);
        }
    }
    return dp[n]<=r;
}

bool check2(LL val){

    dp1[0][0] = 1;

    for(int i=1;i<=n;i++)
        for(int j=1;j<=i;j++){
            LL sum = 0;
            dp1[i][j] = 0;
            for(int k=i;k>=1;k--){
                sum += a[k];
                if((sum&val)==sum)
                    dp1[i][j] |= dp1[k-1][j-1];
            }
        }

    bool q = 0;
    for(int i=l;i<=r;i++)
        q |= dp1[n][i];
    
    return q;
}

int main(){

    //freopen("out.txt","w",stdout);

    scanf("%d%d%d",&n,&l,&r);

    for(int i=1;i<=n;i++)
        scanf("%lld",&a[i]);

    LL ans = (1ll<<45)-1;
    for(LL i=44;i>=0;i--){
        ans ^= 1ll<<i;
        if(l==1){
            if(!check1(ans))ans ^= 1ll<<i;
        }
        else 
            if(!check2(ans))ans ^= 1ll<<i;
    }
    printf("%lld\n",ans);
}   

Compilation message (stderr)

sculpture.cpp: In function 'int main()':
sculpture.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     scanf("%d%d%d",&n,&l,&r);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
sculpture.cpp:65:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         scanf("%lld",&a[i]);
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 25 / 25
• Subtask 5: 29 / 29