oj.uz

Submission #1071174

# Submission time Handle Problem Language Result Execution time Memory
1071174 2024-08-23T05:35:34 Z ttamx Cultivation (JOI17_cultivation) C++17
30 / 100
 2000 ms 1496 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>

using namespace std;

const int N=305;
const int INF=2e9;

int n;
int r,c;
int x[N],y[N];
vector<int> pos;

int calc(int xl,int xr){
    vector<int> xs;
    for(int i=0;i<n;i++){
        xs.emplace_back(max(1,x[i]-xl));
        xs.emplace_back(min(r,x[i]+xr)+1);
    }
    xs.emplace_back(1);
    xs.emplace_back(r+1);
    sort(xs.begin(),xs.end());
    xs.erase(unique(xs.begin(),xs.end()),xs.end());
    int xn=xs.size();
    vector<vector<pair<int,int>>> event(xn);
    for(int i=0;i<n;i++){
        int xi=lower_bound(xs.begin(),xs.end(),max(1,x[i]-xl))-xs.begin();
        int xj=lower_bound(xs.begin(),xs.end(),min(r,x[i]+xr)+1)-xs.begin();
        event[xi].emplace_back(y[i],1);
        event[xj].emplace_back(y[i],0);
    }
    event.pop_back();
    int mxa=0,mxb=0,sum=0;
    multiset<int> pts,dif;
    for(auto &e:event){
        for(auto [x,t]:e){
            if(t){
                auto it=pts.emplace(x);
                if(next(it)!=pts.end()&&it!=pts.begin()){
                    dif.erase(dif.find(*next(it)-*prev(it)));
                }
                if(next(it)!=pts.end()){
                    dif.emplace(*next(it)-*it);
                }
                if(it!=pts.begin()){
                    dif.emplace(*it-*prev(it));
                }
            }else{
                auto it=pts.find(x);
                assert(it!=pts.end());
                if(next(it)!=pts.end()){
                    dif.erase(dif.find(*next(it)-*it));
                }
                if(it!=pts.begin()){
                    dif.erase(dif.find(*it-*prev(it)));
                }
                if(next(it)!=pts.end()&&it!=pts.begin()){
                    dif.emplace(*next(it)-*prev(it));
                }
                pts.erase(it);
            }
        }
        if(pts.empty())return INF;
        mxa=max(mxa,*pts.begin()-1);
        mxb=max(mxb,c-*pts.rbegin());
        if(!dif.empty()){
            sum=max(sum,*dif.rbegin()-1);
        }
    }
    return min((long long)INF,(long long)xl+xr+max(sum,mxa+mxb));
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> r >> c >> n;
    for(int i=0;i<n;i++){
        cin >> x[i] >> y[i];
        pos.emplace_back(x[i]);
    }
    vector<int> xs;
    int mxa=0,mxb=0,sum=0;
    sort(pos.begin(),pos.end());
    mxa=pos[0]-1;
    mxb=r-pos[n-1];
    for(int i=1;i<n;i++){
        sum=max(sum,pos[i]-pos[i-1]-1);
    }
    for(int i=0;i<n;i++){
        xs.emplace_back(x[i]-1);
        xs.emplace_back(r-x[i]);
        for(int j=0;j<n;j++){
            int d=abs(x[i]-x[j]);
            xs.emplace_back(d);
            if(d>0){
                xs.emplace_back(d-1);
            }
        }
    }
    sort(xs.begin(),xs.end());
    xs.erase(unique(xs.begin(),xs.end()),xs.end());
    int ans=r+c-2;
    for(int xl:xs){
        if(xl<mxa)continue;
        for(int xr:xs){
            if(xr<mxb)continue;
            if(xl+xr<sum)continue;
            if(xl+xr<ans){
                ans=min(ans,calc(xl,xr));
            }
        }
    }
    cout << ans;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 16 ms 348 KB Output is correct
22 Correct 16 ms 704 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 15 ms 992 KB Output is correct
25 Correct 17 ms 732 KB Output is correct
26 Correct 40 ms 1496 KB Output is correct
27 Correct 33 ms 1492 KB Output is correct
28 Correct 16 ms 992 KB Output is correct
29 Correct 15 ms 1496 KB Output is correct
30 Correct 18 ms 1496 KB Output is correct
31 Correct 15 ms 1492 KB Output is correct
32 Correct 26 ms 1496 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 16 ms 348 KB Output is correct
22 Correct 16 ms 704 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 15 ms 992 KB Output is correct
25 Correct 17 ms 732 KB Output is correct
26 Correct 40 ms 1496 KB Output is correct
27 Correct 33 ms 1492 KB Output is correct
28 Correct 16 ms 992 KB Output is correct
29 Correct 15 ms 1496 KB Output is correct
30 Correct 18 ms 1496 KB Output is correct
31 Correct 15 ms 1492 KB Output is correct
32 Correct 26 ms 1496 KB Output is correct
33 Correct 5 ms 1492 KB Output is correct
34 Correct 189 ms 1492 KB Output is correct
35 Correct 244 ms 1496 KB Output is correct
36 Correct 229 ms 1496 KB Output is correct
37 Correct 183 ms 1492 KB Output is correct
38 Correct 269 ms 1496 KB Output is correct
39 Correct 236 ms 1496 KB Output is correct
40 Correct 239 ms 1492 KB Output is correct
41 Correct 207 ms 1492 KB Output is correct
42 Correct 226 ms 1496 KB Output is correct
43 Correct 224 ms 1496 KB Output is correct
44 Correct 245 ms 1496 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 344 KB Output is correct
2 Correct 1483 ms 344 KB Output is correct
3 Correct 739 ms 592 KB Output is correct
4 Execution timed out 2053 ms 468 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 344 KB Output is correct
2 Correct 1483 ms 344 KB Output is correct
3 Correct 739 ms 592 KB Output is correct
4 Execution timed out 2053 ms 468 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 4 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 16 ms 348 KB Output is correct
22 Correct 16 ms 704 KB Output is correct
23 Correct 2 ms 344 KB Output is correct
24 Correct 15 ms 992 KB Output is correct
25 Correct 17 ms 732 KB Output is correct
26 Correct 40 ms 1496 KB Output is correct
27 Correct 33 ms 1492 KB Output is correct
28 Correct 16 ms 992 KB Output is correct
29 Correct 15 ms 1496 KB Output is correct
30 Correct 18 ms 1496 KB Output is correct
31 Correct 15 ms 1492 KB Output is correct
32 Correct 26 ms 1496 KB Output is correct
33 Correct 5 ms 1492 KB Output is correct
34 Correct 189 ms 1492 KB Output is correct
35 Correct 244 ms 1496 KB Output is correct
36 Correct 229 ms 1496 KB Output is correct
37 Correct 183 ms 1492 KB Output is correct
38 Correct 269 ms 1496 KB Output is correct
39 Correct 236 ms 1496 KB Output is correct
40 Correct 239 ms 1492 KB Output is correct
41 Correct 207 ms 1492 KB Output is correct
42 Correct 226 ms 1496 KB Output is correct
43 Correct 224 ms 1496 KB Output is correct
44 Correct 245 ms 1496 KB Output is correct
45 Correct 153 ms 344 KB Output is correct
46 Correct 1483 ms 344 KB Output is correct
47 Correct 739 ms 592 KB Output is correct
48 Execution timed out 2053 ms 468 KB Time limit exceeded
49 Halted 0 ms 0 KB -