Submission #1165402

#	Time	Username	Problem	Language	Result	Execution time	Memory
1165402		mysticmage45	Bali Sculptures (APIO15_sculpture)	C++20	37 / 100	3 ms	400 KiB

sculpture

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

#define ll long long
const ll bitsize = 40; // Increased bit size

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    ll n, a, b;
    cin >> n >> a >> b;

    vector<ll> year(n+1);
    for(ll i = 1; i <= n; i++){
        cin >> year[i];
    }

    // Precompute prefix sums
    vector<ll> prefix(n+1, 0);
    for(ll i = 1; i <= n; i++){
        prefix[i] = prefix[i-1] + year[i];
    }

    ll ans = 0;
    for(ll digit = bitsize; digit >= 0; digit--){
        if(a == 1){
            // Case when a == 1
            vector<ll> dp(n+1, 1e18);
            dp[0] = 0;

            for(ll i = 0; i <= n; i++){
                for(ll j = i+1; j <= n; j++){
                    ll sum = prefix[j] - prefix[i];
                    bool valid = true;

                    // Check if higher bits are compatible with ans
                    for(ll k = digit+1; k <= bitsize; k++){
                        if(((sum >> k) & 1) && !((ans >> k) & 1)){
                            valid = false;
                            break;
                        }
                    }

                    // Check if the current bit can be 0
                    if((sum >> digit) & 1){
                        valid = false;
                    }

                    if(valid){
                        dp[j] = min(dp[j], dp[i] + 1);
                    }
                }
            }

            // If no valid partition exists, set this bit in ans
            if(dp[n] > b){
                ans += (1 << digit);
            }
        }
        else{
            // Case when a > 1
            vector<vector<ll>> dp(n+1, vector<ll>(n+1, 1e18));
            dp[0][0] = 0;

            for(ll i = 0; i <= n; i++){
                for(ll j = i+1; j <= n; j++){
                    ll sum = prefix[j] - prefix[i];
                    bool valid = true;

                    // Check if higher bits are compatible with ans
                    for(ll k = digit+1; k <= bitsize; k++){
                        if(((sum >> k) & 1) && !((ans >> k) & 1)){
                            valid = false;
                            break;
                        }
                    }

                    // Check if the current bit can be 0
                    if((sum >> digit) & 1){
                        valid = false;
                    }

                    if(valid){
                        for(ll k = 0; k < n; k++){
                            dp[j][k+1] = min(dp[j][k+1], dp[i][k] + 1);
                        }
                    }
                }
            }

            // Check if any partition count between a and b is valid
            bool canSet = false;
            for(ll k = a; k <= b; k++){
                if(dp[n][k] <= b){
                    canSet = true;
                    break;
                }
            }

            // If no valid partition exists, set this bit in ans
            if(!canSet){
                ans += (1 << digit);
            }
        }
    }

    cout << ans;
}

• Subtask 1: 0 / 9
• Subtask 2: 16 / 16
• Subtask 3: 21 / 21
• Subtask 4: 0 / 25
• Subtask 5: 0 / 29