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Submission #600732

# Submission time Handle Problem Language Result Execution time Memory
600732 2022-07-21T07:30:41 Z isaachew Uplifting Excursion (BOI22_vault) C++17
0 / 100
 264 ms 524288 KB 
#include <bits/stdc++.h>
/*
 Lift
 
 ST3-6 are split up into half-subtasks
 
 ST2.5-5.5: simple DP?
 
 5000ms time limit;
 
 20p with brute force O((n/2)^5)
 2:56 pm
 
 ST1/2: plain brute force (O(M*(sum(a_l)^2)) = O(n^5))
 
 */
std::vector<int> uplifts;
int main(){
    int m;
    long long l;
    std::cin>>m>>l;
    int maxv=0;
    for(int i=-m;i<=m;i++){
        int x;
        std::cin>>x;
        uplifts.push_back(x);
        maxv=std::max(x,maxv);
    }
    if(m*m*maxv*maxv<=100000000){
        int tmv=m*(m+1)/2*maxv;//really only half of the max
        std::vector<int> values1(tmv,-1000000000);//positive
        std::vector<int> values2(tmv,-1000000000);//negative
        values1[0]=0;
        values2[0]=0;
        for(int k=1;k<=m;k++){
            for(int x=0;x<uplifts[m+k];x++){
                for(int y=tmv-1-k;y>=0;y--){
                    values1[y+k]=std::max(values1[y]+1,values1[y+k]);
                }
            }
        }
        for(int k=1;k<=m;k++){
            for(int x=0;x<uplifts[m-k];x++){
                for(int y=tmv-1-k;y>=0;y--){
                    values2[y+k]=std::max(values2[y]+1,values2[y+k]);
                }
            }
        }
        int totalmax=0;
        for(int i=0;i<tmv&&i-l<tmv;i++){
            if(i-l<0)continue;
            totalmax=std::max(totalmax,values1[i]+values2[i-l]);
        }
        std::cout<<totalmax+uplifts[m]<<'\n';
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 264 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 264 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 264 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 264 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 264 ms 524288 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -