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Submission #25025

# Submission time Handle Problem Language Result Execution time Memory
25025 2017-06-20T04:25:17 Z 윤교준(#1055) Palembang Bridges (APIO15_bridge) C++11
22 / 100
 63 ms 6380 KB 
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
#include <vector>
#include <stack>
#include <deque>
#include <queue>
#include <set>
#include <map>
#include <unordered_map>
#include <bitset>
#include <string>
#define pb push_back
#define sz(V) ((int)(V).size())
#define allv(V) ((V).begin()),((V).end())
#define befv(V) ((V)[(sz(V)-2)])
#define sorv(V) sort(allv(V))
#define univ(V) (V).erase(unique(allv(V)),(V).end())
#define upmin(a,b) (a)=min((a),(b))
#define upmax(a,b) (a)=max((a),(b))
#define INF (1100000099)
#define INFLL (1100000000000000099ll)
#define MAXN (100005)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, ll> pil;
typedef pair<ll, int> pli;
inline ll myabs(const ll& n) { return n < 0 ? -n : n; }

ll d[2][MAXN];
int A[MAXN], B[MAXN], P[MAXN];
int N, K;
ll Ans;

void input() {
    scanf("%d%d", &K, &N);
    int cnt = 0; for(int i = 0; i < N; i++) {
        int x, y; char a, b; scanf(" %c%d %c%d", &a, &x, &b, &y);
        if(a == b) { Ans += myabs(x-y); continue; }
        A[cnt] = x; B[cnt] = y; cnt++;
    }
    N = cnt;
}
void process1() {
    vector<int> V;
    for(int i = 0; i < N; i++) { V.pb(A[i]); V.pb(B[i]); }
    sorv(V); const int X = V[sz(V)/2];
    for(int i = 0; i < N; i++) Ans += myabs((ll)A[i] - X) + myabs((ll)B[i] - X);
    Ans += sz(V)/2;
}
multiset<int> Q;
void meanF(ll d[]) {
    multiset<int>().swap(Q);
    Q.insert(A[P[0]]); Q.insert(B[P[0]]);
    auto it = Q.begin(); d[0] = myabs((ll)A[P[0]] - (*it)) + myabs((ll)B[P[0]] - (*it));
    for(int p_i = 1; p_i < N; p_i++) {
        const int &idx = P[p_i]; ll &ret = d[p_i];
        if(A[idx] > B[idx]) swap(A[idx], B[idx]);
        if(B[idx] <= (*it)) {
            const int prv = *it;
            Q.insert(A[idx]); Q.insert(B[idx]);
            it--; ret = d[p_i-1] + (ll)(*it)*2 - A[idx] - B[idx] + ((ll)prv-(*it))*2;
        } else if((*it) <= A[idx]) {
            Q.insert(A[idx]); Q.insert(B[idx]);
            it++; ret = d[p_i-1] + A[idx] + B[idx] - (ll)(*it)*2;
        } else {
            Q.insert(A[idx]); Q.insert(B[idx]);
            ret = d[p_i-1] + B[idx] - A[idx];
        }
    }
}
void process2() {
    for(int i = 0; i < N; i++) P[i] = i;
    sort(P, P+N, [&](const int& a, const int& b) -> bool {
        return (A[a]+B[a]) < (A[b]+B[b]);
    });
    meanF(d[0]); reverse(P, P+N); meanF(d[1]); reverse(d[1], d[1]+N); reverse(P, P+N);

    ll ret = d[0][0] + d[1][1];

    for(int i = 0; i+1 < N; i++) {
        upmin(ret, d[0][i] + d[1][i+1]);
    }
    upmin(ret, d[0][N-1]); upmin(ret, d[1][0]);
    Ans += ret + N;
}
int main() {
    input();
    if(!N); else if(1 == N) { Ans += myabs(A[0] - B[0]) + 1; }
    else if(1 == K) process1(); else process2();
    printf("%lld\n", Ans);
    return 0;
}

Compilation message

bridge.cpp: In function 'void input()':
bridge.cpp:41:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &K, &N);
                          ^
bridge.cpp:43:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int x, y; char a, b; scanf(" %c%d %c%d", &a, &x, &b, &y);
                                                                 ^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4760 KB Output is correct
2 Correct 0 ms 4760 KB Output is correct
3 Correct 0 ms 4760 KB Output is correct
4 Correct 0 ms 4760 KB Output is correct
5 Correct 0 ms 4760 KB Output is correct
6 Correct 0 ms 4760 KB Output is correct
7 Correct 0 ms 4760 KB Output is correct
8 Correct 0 ms 4760 KB Output is correct
9 Correct 0 ms 4760 KB Output is correct
10 Correct 0 ms 4760 KB Output is correct
11 Correct 0 ms 4760 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4760 KB Output is correct
2 Correct 0 ms 4760 KB Output is correct
3 Correct 0 ms 4760 KB Output is correct
4 Correct 0 ms 4760 KB Output is correct
5 Correct 0 ms 4760 KB Output is correct
6 Correct 0 ms 4760 KB Output is correct
7 Correct 0 ms 4760 KB Output is correct
8 Correct 0 ms 4760 KB Output is correct
9 Correct 0 ms 4760 KB Output is correct
10 Correct 0 ms 4760 KB Output is correct
11 Correct 0 ms 4760 KB Output is correct
12 Correct 53 ms 6380 KB Output is correct
13 Correct 63 ms 6380 KB Output is correct
14 Correct 49 ms 6380 KB Output is correct
15 Correct 29 ms 5612 KB Output is correct
16 Correct 39 ms 6380 KB Output is correct
17 Correct 39 ms 6380 KB Output is correct
18 Correct 49 ms 6380 KB Output is correct
19 Correct 53 ms 6380 KB Output is correct
20 Correct 33 ms 6380 KB Output is correct
21 Correct 53 ms 6380 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4760 KB Output is correct
2 Correct 0 ms 4760 KB Output is correct
3 Incorrect 0 ms 4760 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4760 KB Output is correct
2 Correct 0 ms 4760 KB Output is correct
3 Incorrect 0 ms 4760 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4760 KB Output is correct
2 Correct 0 ms 4760 KB Output is correct
3 Incorrect 0 ms 4760 KB Output isn't correct
4 Halted 0 ms 0 KB -