Submission #24675

#	Time	Username	Problem	Language	Result	Execution time	Memory
24675		chan492811	Bali Sculptures (APIO15_sculpture)	C++11	100 / 100	176 ms	1184 KiB

sculpture

#include <cstdio>
#include <algorithm>
#define ll long long
using namespace std;

int n,a,b;
ll sum[2010],res;
int table[2010],table2[110][110];
bool make(int flag){
    int i,j,k;
    if(flag){
        for(i=1;i<=n;i++){
            for(j=0;j<i;j++){
                if((sum[i]-sum[j]|res)==res) table[i]=min(table[i],table[j]+1);
            }
        }
        if(table[n]<=b) return 1; return 0;
    }else{
        for(k=1;k<=b;k++){
            for(i=1;i<=n;i++){
                table2[k][i]=0;
                for(j=0;j<i;j++){
                    if((sum[i]-sum[j]|res)==res){
                        table2[k][i]= max(table2[k][i],table2[k-1][j] ? 1 : 0 );
                    }
                }
            }
        }
        for(i=a;i<=b;i++){
            if(table2[i][n]) return 1;
        }
        return 0;
    }
}
int main(){
    int j;
    ll i;
    ll now;
    scanf("%d %d %d",&n,&a,&b);
    for(i=1;i<=n;i++){
        scanf("%lld",&sum[i]); sum[i]+=sum[i-1];
    }
    res=1ll<<50; res--;
    for(i=49;i>=0;i--){
        for(j=1;j<2010;j++) table[j]=21e8;
        table2[0][0]=1;
        now=(1ll<<i);
        res-=now;
        if(a==1){
            if(!make(1)) res+=now;
        }else{
            if(!make(0)) res+=now;
        }
    }
    printf("%lld",res);
    return 0;
}

Compilation message (stderr)

sculpture.cpp: In function 'bool make(int)':
sculpture.cpp:14:27: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
                 if((sum[i]-sum[j]|res)==res) table[i]=min(table[i],table[j]+1);
                           ^
sculpture.cpp:23:31: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
                     if((sum[i]-sum[j]|res)==res){
                               ^
sculpture.cpp: In function 'int main()':
sculpture.cpp:39:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d",&n,&a,&b);
                               ^
sculpture.cpp:41:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&sum[i]); sum[i]+=sum[i-1];
                              ^

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