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Submission #14391

# Submission time Handle Problem Language Result Execution time Memory
14391 2015-05-14T00:03:39 Z gs14004 Palembang Bridges (APIO15_bridge) C++14
100 / 100
 206 ms 9784 KB 
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <utility>
using namespace std;
typedef pair<int,int> pi;
typedef long long lint;

int n,k;
vector<pi> sol;

lint solve(){
    if(sol.empty()) return 0;
    vector<int> ret;
    for(auto i : sol){
        ret.push_back(i.first);
        ret.push_back(i.second);
    }
    sort(ret.begin(),ret.end());
    int med = ret[ret.size()/2];
    lint res = 0;
    for(auto i : ret){
        lint t = i;
        t -= med;
        res += max(t,-t);
    }
    return res;
}

bool cmp(pi a, pi b){
    return a.first + a.second < b.first + b.second;
}

vector<int> cand;

struct bit{
    lint tree[200005];
    int piv;
    void init(int n){
        piv = n+2;
        memset(tree,0,sizeof(tree));
    }
    void add(int x, int v){
        x += 2;
        while(x <= piv){
            tree[x] += v;
            x += x & -x;
        }
    }
    int kth(int k){
        int p = 0;
        for(int i=17; i>=0; i--){
            if((p|1<<i) <= piv && tree[p|(1<<i)] < k){
                p |= 1<<i;
                k -= tree[p];
            }
        }
        return p-1;
    }
    lint sum(int x){
        x += 2;
        lint ret = 0;
        while(x){
            ret += tree[x];
            x -= x & -x;
        }
        return ret;
    }
    lint sum_range(int s, int e){
        return sum(e) - sum(s-1);
    }
}bit1, bit2;

lint dp1[100005], dp2[100005];

lint solve2(){
    if(sol.empty()) return 0;
    sort(sol.begin(), sol.end(), cmp);
    for (auto &i : sol){
        cand.push_back(i.first);
        cand.push_back(i.second);
    }
    sort(cand.begin(), cand.end());
    cand.resize(unique(cand.begin(),cand.end()) - cand.begin());
    for (auto &i : sol){
        i.first = (int)(lower_bound(cand.begin(),cand.end(),i.first) - cand.begin());
        i.second = (int)(lower_bound(cand.begin(),cand.end(),i.second) - cand.begin());
    }
    bit1.init((int)cand.size());
    bit2.init((int)cand.size());
    for (int i=0; i<sol.size(); i++){
        pi t = sol[i];
        bit1.add(t.first,1);
        bit1.add(t.second,1);
        bit2.add(t.first,cand[t.first]);
        bit2.add(t.second,cand[t.second]);
        int piv = bit1.kth(i+1);
        dp1[i] += bit2.sum_range(piv+1,(int)cand.size()-1);
        dp1[i] -= bit1.sum_range(piv+1,(int)cand.size()-1) * cand[piv];
        dp1[i] += bit1.sum_range(0,piv-1) * cand[piv];
        dp1[i] -= bit2.sum_range(0,piv-1);
    }
    bit1.init((int)cand.size());
    bit2.init((int)cand.size());
    for (int i=(int)sol.size()-1; i>=0; i--) {
        pi t = sol[i];
        bit1.add(t.first,1);
        bit1.add(t.second,1);
        bit2.add(t.first,cand[t.first]);
        bit2.add(t.second,cand[t.second]);
        int piv = bit1.kth((int)sol.size()-i);
        dp2[i] += bit2.sum_range(piv+1,(int)cand.size()-1);
        dp2[i] -= bit1.sum_range(piv+1,(int)cand.size()-1) * cand[piv];
        dp2[i] += bit1.sum_range(0,piv-1) * cand[piv];
        dp2[i] -= bit2.sum_range(0,piv-1);
    }
    lint ans = 1e18;
    for (int i=0; i<=sol.size(); i++) {
        ans = min(ans,(i ? dp1[i-1] : 0) + dp2[i]);
    }
    return ans;
}

int main(){
    lint ret = 0;
    scanf("%d %d",&k,&n);
    for(int i=0; i<n; i++){
        char s1[5], s2[5];
        int t,u;
        scanf("%s %d %s %d",s1,&t,s2,&u);
        if(t > u) swap(t,u);
        if(s1[0] != s2[0]){
            sol.push_back(pi(t,u));
        }
        else{
            ret += u - t - 1;
        }
    }
    ret += n;
    if(k == 1) ret += solve();
    else ret += solve2();
    printf("%lld",ret);
}

Compilation message

bridge.cpp: In function 'lint solve2()':
bridge.cpp:93:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<sol.size(); i++){
                    ^
bridge.cpp:120:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<=sol.size(); i++) {
                    ^
bridge.cpp: In function 'int main()':
bridge.cpp:128:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&k,&n);
                         ^
bridge.cpp:132:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s %d %s %d",s1,&t,s2,&u);
                                         ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6628 KB Output is correct
2 Correct 0 ms 6628 KB Output is correct
3 Correct 0 ms 6628 KB Output is correct
4 Correct 0 ms 6628 KB Output is correct
5 Correct 0 ms 6628 KB Output is correct
6 Correct 0 ms 6628 KB Output is correct
7 Correct 0 ms 6628 KB Output is correct
8 Correct 0 ms 6628 KB Output is correct
9 Correct 0 ms 6628 KB Output is correct
10 Correct 0 ms 6628 KB Output is correct
11 Correct 0 ms 6628 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6628 KB Output is correct
2 Correct 0 ms 6628 KB Output is correct
3 Correct 0 ms 6628 KB Output is correct
4 Correct 0 ms 6628 KB Output is correct
5 Correct 0 ms 6628 KB Output is correct
6 Correct 0 ms 6628 KB Output is correct
7 Correct 0 ms 6628 KB Output is correct
8 Correct 0 ms 6628 KB Output is correct
9 Correct 0 ms 6628 KB Output is correct
10 Correct 0 ms 6628 KB Output is correct
11 Correct 0 ms 6628 KB Output is correct
12 Correct 26 ms 9784 KB Output is correct
13 Correct 63 ms 9784 KB Output is correct
14 Correct 49 ms 9784 KB Output is correct
15 Correct 33 ms 8248 KB Output is correct
16 Correct 46 ms 9784 KB Output is correct
17 Correct 43 ms 9784 KB Output is correct
18 Correct 66 ms 9784 KB Output is correct
19 Correct 66 ms 9784 KB Output is correct
20 Correct 46 ms 9784 KB Output is correct
21 Correct 79 ms 9784 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6628 KB Output is correct
2 Correct 0 ms 6628 KB Output is correct
3 Correct 0 ms 6628 KB Output is correct
4 Correct 0 ms 6628 KB Output is correct
5 Correct 0 ms 6628 KB Output is correct
6 Correct 0 ms 6628 KB Output is correct
7 Correct 0 ms 6628 KB Output is correct
8 Correct 3 ms 6628 KB Output is correct
9 Correct 0 ms 6628 KB Output is correct
10 Correct 0 ms 6628 KB Output is correct
11 Correct 0 ms 6628 KB Output is correct
12 Correct 0 ms 6628 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6628 KB Output is correct
2 Correct 0 ms 6628 KB Output is correct
3 Correct 0 ms 6628 KB Output is correct
4 Correct 0 ms 6628 KB Output is correct
5 Correct 0 ms 6628 KB Output is correct
6 Correct 0 ms 6628 KB Output is correct
7 Correct 0 ms 6628 KB Output is correct
8 Correct 0 ms 6628 KB Output is correct
9 Correct 0 ms 6628 KB Output is correct
10 Correct 3 ms 6628 KB Output is correct
11 Correct 0 ms 6628 KB Output is correct
12 Correct 0 ms 6628 KB Output is correct
13 Correct 0 ms 6628 KB Output is correct
14 Correct 0 ms 6628 KB Output is correct
15 Correct 3 ms 6628 KB Output is correct
16 Correct 0 ms 6628 KB Output is correct
17 Correct 0 ms 6628 KB Output is correct
18 Correct 0 ms 6628 KB Output is correct
19 Correct 3 ms 6628 KB Output is correct
20 Correct 3 ms 6628 KB Output is correct
21 Correct 0 ms 6628 KB Output is correct
22 Correct 0 ms 6628 KB Output is correct
23 Correct 0 ms 6628 KB Output is correct
24 Correct 0 ms 6628 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 6628 KB Output is correct
2 Correct 0 ms 6628 KB Output is correct
3 Correct 0 ms 6628 KB Output is correct
4 Correct 0 ms 6628 KB Output is correct
5 Correct 0 ms 6628 KB Output is correct
6 Correct 0 ms 6628 KB Output is correct
7 Correct 0 ms 6628 KB Output is correct
8 Correct 0 ms 6628 KB Output is correct
9 Correct 0 ms 6628 KB Output is correct
10 Correct 3 ms 6628 KB Output is correct
11 Correct 0 ms 6628 KB Output is correct
12 Correct 0 ms 6628 KB Output is correct
13 Correct 3 ms 6628 KB Output is correct
14 Correct 0 ms 6628 KB Output is correct
15 Correct 3 ms 6628 KB Output is correct
16 Correct 0 ms 6628 KB Output is correct
17 Correct 0 ms 6628 KB Output is correct
18 Correct 0 ms 6628 KB Output is correct
19 Correct 3 ms 6628 KB Output is correct
20 Correct 3 ms 6628 KB Output is correct
21 Correct 3 ms 6628 KB Output is correct
22 Correct 0 ms 6628 KB Output is correct
23 Correct 0 ms 6628 KB Output is correct
24 Correct 0 ms 6628 KB Output is correct
25 Correct 49 ms 9784 KB Output is correct
26 Correct 73 ms 9784 KB Output is correct
27 Correct 199 ms 9784 KB Output is correct
28 Correct 196 ms 9784 KB Output is correct
29 Correct 206 ms 9784 KB Output is correct
30 Correct 86 ms 8248 KB Output is correct
31 Correct 59 ms 9784 KB Output is correct
32 Correct 146 ms 9784 KB Output is correct
33 Correct 113 ms 9784 KB Output is correct
34 Correct 149 ms 9784 KB Output is correct
35 Correct 76 ms 9784 KB Output is correct
36 Correct 116 ms 9784 KB Output is correct
37 Correct 43 ms 9784 KB Output is correct