Submission #585519

#	Time	Username	Problem	Language	Result	Execution time	Memory
585519		Do_you_copy	Palembang Bridges (APIO15_bridge)	C++14	22 / 100	43 ms	5168 KiB

bridge

#include <bits/stdc++.h>
#define taskname "test"
#define fi first
#define se second
#define pb push_back
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
using namespace std;

using ll = long long;
using pii = pair <int, int>;

ll min(const ll &a, const ll &b){
    return (a < b) ? a : b;
}

ll max(const ll &a, const ll &b){
    return (a > b) ? a : b;
}

const ll Mod = 1000000007;
const int maxN = 2e5;
int k, n;
ll suf[maxN], pre[maxN];
void Init(){
    ll ans = 0;
    cin >> k >> n;
    vector <ll> v;
    for (int i = 1; i <= n; ++i){
        char p, q; int s, t;
        cin >> p >> s >> q >> t;
        if (p != q){
            ++ans;
            v.pb(s);
            v.pb(t);
        }
        else{
            ans += abs(s - t);
        }
    }
    v.push_back(0);
    sort(v.begin(), v.end());
    if (k == 1){
        int m = v.size();
        ll tem = LLONG_MAX;
        for (int i = 1; i < m; ++i){
            pre[i] = pre[i - 1] + v[i];
        }
        for (int i = m - 1; i > 0; --i){
            suf[i] = suf[i + 1] + v[i];
        }
        for (int i = 1; i < m; ++i){
            tem = min(tem, v[i] * (i - 1) - pre[i - 1] + suf[i + 1] - v[i] * (m - i - 1));
        }
        if (m == 1) tem = 0;
        cout << ans + tem;
    }
}

int main(){
    if (fopen(taskname".txt", "r")){
        freopen(taskname".txt", "r", stdin);
    }
    faster
    Init();
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(taskname".txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37