Submission #492254

#	Time	Username	Problem	Language	Result	Execution time	Memory
492254		Killer2501	Aliens (IOI16_aliens)	C++17	Compilation error	0 ms	0 KiB

aliens

#include<bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define pll pair<ll, ll>
#define pb push_back
using namespace std;
const int N = 1e5+5;
const int M = 2e5+5;
const ll mod = 1e9+7;
const int base = 400;
const ll inf = 1e16;
ll ans, tong, n, k, a[N], b[N], m, c[N], d[N], t, lab[N], dp[N][2];
vector<pll> adj[N], kq;
string s;
pll p[N];
void cal(int l, int r, int opl, int opr, int j)
{
    if(l > r)return;
    int mid = (l+r)/2;
    int best = mid;
    dp[mid][j] = inf;
    for(int i = opl; i <= min(mid, opr); i ++)
    {
        tong = dp[i-1][j^1] + (p[mid].se-p[i].fi+1)*(p[mid].se-p[i].fi+1);
        if(i > 1)tong -= max(0ll, p[i-1].se-p[i].fi+1)*max(0ll, p[i-1].se-p[i].fi+1);
        if(dp[mid][j] > tong)
        {
            dp[mid][j] = tong;
            best = i;
        }
    }
    cal(l, mid-1, opl, best, j);
    cal(mid+1, r, best, opr, j);
}
bool cmp(pll& x, pll& y)
{
    if(x.fi != y.fi)return x.fi < y.fi;
    return x.se > y.se;
}
ll take_photos(int N, int M, int K, vector<int> r, vector<int> c)
{
    n = N;
    m = M;
    k = K;
    for(int i = 1; i <= n; i ++)
    {
        p[i].fi = r[i-1];
        p[i].se = c[i-1];
        if(p[i].fi > p[i].se)swap(p[i].fi, p[i].se);
    }
    sort(p+1, p+1+n, cmp);
    for(int i = 1; i <= n; i ++)
    {
        if(!kq.empty() && kq.back().se >= p[i].se)continue;
        kq.pb(p[i]);
    }
    n = kq.size();
    for(int i = 1; i <= n; i ++)p[i] = kq[i-1];
    for(int i = 1; i <= n; i ++)dp[i][0] = inf;
    for(int j = 1; j <= k; j ++)
    {
        cal(1, n, 1, n, j&1);
    }
    return dp[n][k&1];
}
void sol()
{
    vector<int> r, c;
    cin >> n >> m >> k;
    r.resize(n);
    c.resize(n);
    for(int i = 0; i < n; i ++)cin >> r[i];
    for(int i = 0; i < n; i ++)cin >> c[i];
    cout << take_photos(n, m, k, r, c);
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    #define task "test"
    if(fopen(task".inp", "r"))
    {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int ntest = 1;
    //cin >> ntest;
    while(ntest -- > 0)sol();
}
/*
9 2 1 9
5 1
*/

Compilation message (stderr)

aliens.cpp: In function 'int main()':
aliens.cpp:85:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
aliens.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cc4FxeJZ.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccXbQPYY.o:aliens.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status