oj.uz

Submission #1031951

# Submission time Handle Problem Language Result Execution time Memory
1031951 2024-07-23T09:00:11 Z _8_8_ Palembang Bridges (APIO15_bridge) C++17
63 / 100
 2000 ms 10456 KB 
#include <bits/stdc++.h>
 
using namespace std;
    
typedef long long ll;
const int  N = 3e5 + 21, MOD = (int)1e9+7;
 
#define int ll
int n,k;
ll res = 0;
array<int,2> a[N];
ll L[N],R[N];
vector<pair<int,int>> sc;
void prec(){
    for(int i = 1;i <= n;i++){
        sc.push_back({a[i][0],0});
        sc.push_back({a[i][1],1});
    }
    sort(sc.begin(),sc.end());
    ll sum = 0,col = 0;
    for(int i = 0;i < (int)sc.size();i++){
        L[i] = (sc[i].first * 1ll * col) - sum;
        if(sc[i].second == 1){
            col++;
            sum += sc[i].first;
        }
    }
    col = sum =0 ;
    for(int i = (int)sc.size() - 1;i >= 0;i--){
        R[i] = sum - (sc[i].first * 1ll * col);
        if(sc[i].second == 0){
            col++;
            sum += sc[i].first;
        }
    }
}
ll solve(){
    if(!n) return 0;
    ll res = 1e18;
    for(int i = 0;i < (int)sc.size();i++){
        res = min(res,2*(L[i] + R[i]));
    }
    return res;
}
ll calc(int l,int r){
    ll sum = 0;
    for(int i = 1;i <= n;i++){
        if(a[i][0] > l && a[i][1] < r){
            sum += min(2ll*(a[i][0] - l),2*1ll*(r - a[i][1]));
        }
    }
    return sum;
}
void test() {
    cin >> k >> n;
    int _i = 0;
    for(int i = 1;i <= n;i++) {
        char x,y;
        int l,r;
        cin >> x >> l >> y >> r;
        if(l > r){
            swap(l,r);
            swap(x,y);
        }
        res += (r - l);
        if(x == y){
            continue;
        }
        res++;
        a[++_i] = {l,r};
    }
    n = _i;
    prec();
    if(k == 1){
        cout << res + solve();
        return;
    }
    if(n == 0){
        cout << res;
        return;
    }
    ll cur = 1e18,d = 1e18;
    int j = -1;
    int pos_;
    while(j + 1 < (int)sc.size()){
        ll val = L[0] * 2ll + R[j + 1] * 2ll + calc(sc[0].first,sc[j + 1].first);
        if(val <= cur){
            pos_ = j + 1;
            cur = val;
        }
        j++;
    }
    j = pos_;
    d = cur;
    for(int i = 1;i < (int)sc.size();i++){
        if(j < i) j = i;
        cur = L[i] * 2ll + R[j] *2ll + calc(sc[i].first,sc[j].first);
        while(j + 1 < (int)sc.size()){
            ll val = L[i] * 2ll + R[j + 1] * 2ll + calc(sc[i].first,sc[j + 1].first);
            if(val <= cur){
                cur = val;
                j++;
            }else break;
        }
        // cout << sc[i].first << ' ' << sc[j].first <<  ' ' << cur << '\n';
        d = min(d,cur);
    }
    cout << res + d << '\n';
}
signed main() {
    ios_base::sync_with_stdio(false);cin.tie(0);
    int t = 1; 
    // cin >> t;
    while(t--) {
        test();
    }
}

Compilation message

bridge.cpp: In function 'void test()':
bridge.cpp:84:9: warning: 'pos_' may be used uninitialized in this function [-Wmaybe-uninitialized]
   84 |     int pos_;
      |         ^~~~

Subtask #1
8.0 / 8.0

# 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 468 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct

Subtask #2
14.0 / 14.0

# 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 1 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 600 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 600 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 19 ms 9168 KB Output is correct
13 Correct 36 ms 10432 KB Output is correct
14 Correct 28 ms 8652 KB Output is correct
15 Correct 21 ms 6352 KB Output is correct
16 Correct 21 ms 9928 KB Output is correct
17 Correct 23 ms 10456 KB Output is correct
18 Correct 26 ms 10192 KB Output is correct
19 Correct 41 ms 10356 KB Output is correct
20 Correct 24 ms 10184 KB Output is correct
21 Correct 30 ms 10188 KB Output is correct

Subtask #3
9.0 / 9.0

# 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 0 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 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 352 KB Output is correct
4 Correct 0 ms 352 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 352 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 352 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 4 ms 604 KB Output is correct
14 Correct 9 ms 604 KB Output is correct
15 Correct 9 ms 604 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 2 ms 564 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 3 ms 440 KB Output is correct
20 Correct 6 ms 604 KB Output is correct
21 Correct 5 ms 612 KB Output is correct
22 Correct 8 ms 604 KB Output is correct
23 Correct 6 ms 604 KB Output is correct
24 Correct 7 ms 604 KB Output is correct

Subtask #5
0 / 37.0

# 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 0 ms 348 KB Output is correct
7 Correct 0 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 4 ms 348 KB Output is correct
14 Correct 7 ms 596 KB Output is correct
15 Correct 7 ms 604 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 2 ms 348 KB Output is correct
18 Correct 3 ms 344 KB Output is correct
19 Correct 3 ms 604 KB Output is correct
20 Correct 6 ms 604 KB Output is correct
21 Correct 5 ms 612 KB Output is correct
22 Correct 10 ms 604 KB Output is correct
23 Correct 6 ms 604 KB Output is correct
24 Correct 7 ms 604 KB Output is correct
25 Execution timed out 2071 ms 9168 KB Time limit exceeded
26 Halted 0 ms 0 KB -