Submission #1122064

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122064		E_rK	Snowball (JOI21_ho_t2)	C++14	0 / 100	2 ms	592 KiB

Main

#include <bits/stdc++.h>
#define fast cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false)
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define sp " "
#define endl "\n"
#define mod 1000000007
#define MAXN 200005
#define MAXM 1000005
#define INF 0x3f
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define debug(x) for(auto& a: x) cout << a << " "
 
using namespace std;
typedef long long int lo;
const lo inf = 1000000000000000000;

lo arr[MAXN],pre[MAXN],sz[MAXN];
lo n,m,k;
vector<pair<lo,lo>> v[505];
string s;
vector<lo> wind;
vector<lo> bs;
vector<pair<lo,lo>> ind_kac;
lo ans[MAXN];
void init(){
    lo mx = 0;
    lo i = 1;
    
    while(i <= m){
        if(pre[i] == 0){
            i++;
            continue;
        }
        // cout<< pre[i] << sp << i << sp << mx << endl;
        mx = 0;
        while(i <= m and pre[i] >= 0){
            mx = max(mx,pre[i]);
            i++;
        }
        if(mx > 0)
            wind.pb(mx);
        mx = 0;
        while(i <= m and pre[i] <= 0){
            mx = min(mx,pre[i]);
            i++;
        }
        if(mx < 0)
            wind.pb(mx);
    }
    // debug(wind);
    // cout << endl;

    bs.pb(abs(wind[0]));
    if(wind[0] > 0)
        ind_kac[0] = make_pair(wind[0],0);
    else
        ind_kac[0] = make_pair(0,abs(wind[0]));
    for (int i = 1; i < wind.size(); ++i)
    {
        ind_kac[i] = ind_kac[i-1];
        if(wind[i] < 0)
            ind_kac[i].se = max(ind_kac[i].se,abs(wind[i]));
        else
            ind_kac[i].fi = max(ind_kac[i].fi,wind[i]);
        bs.pb(ind_kac[i].fi+ind_kac[i].se);
    }
    // debug(bs);
}

void solve() {
    cin >> n >> m;

    ind_kac.assign(n+2,{0,0});
    for (int i = 1; i <= n; ++i)
    {
        cin >> arr[i];
    }
    vector<lo> v;
    
    pre[0] = 0;
    for (int i = 1; i <= m; ++i)
    {
        lo a;cin >> a;
        v.pb(a);
        pre[i] = pre[i-1] + a;
    }
    init();
    // debug(wind);
    // cout << endl;
    // debug(bs);
    // cout << endl;
    // for(auto p: ind_kac){
    //     cout << p.fi << sp << p.se << endl;
    // }
    // cout << endl;
    // ans[0] += ind_kac[0].fi;
    arr[0] = -inf;
    arr[n+1] = inf;
    pre[n+1] = 0;
    for (int i = 1; i <= n+1; ++i)
    {
        // cout <<i << "::::::: " << endl;
        // for (int j = 1; j <= n; ++j)
        // {
        //     cout << j << ":" << ans[j] << endl;
        // }
        lo fark = arr[i]-arr[i-1];
        lo it = upper_bound(all(bs),fark)-bs.begin();
        if(it == 0)
            continue;
        it--;
        // cout << fark << endl;
        // cout << "it: " << it << sp << ind_kac[it].fi << sp << ind_kac[it].se << endl;

        ans[i-1] += ind_kac[it].fi;
        ans[i] += ind_kac[it].se;
        lo once = ind_kac[it].fi;
        lo sonra = ind_kac[it].se;
        lo kalan = fark-once-sonra;
        if(it != bs.size()-1){
            // cout << "kalan: " << i << sp << kalan << sp<< it+2 << sp << pre[it+2] << endl;
            if(wind[it+1] > 0){
                ans[i-1] += min(wind[it+1],kalan);
            }
            else{
                ans[i] += min(abs(wind[it+1]),kalan);
            }
        }
        
        // it++;
        // if(pre[it+1] > 0) {
            
        //     ans[i-1] += min(pre[it],fark-once-sonra);
        //     // cout << i-1 << sp << ans[i-1];
        // }
        // else {
        //     ans[i] += min(abs(pre[it]),fark-once-sonra);
        // }
        

    }
    for (int i = 1; i <= n; ++i)
    {
        cout << ans[i] << endl;
    }


}
int main()
{
    // cout << fixed << setprecision(12);
    // freopen("snowboots.in","r",stdin);
    // freopen("snowboots.out","w",stdout);
    fast;
    int t = 1;
 
    // cin >> t;
    while(t--)      
    {
        solve();
    }

    // cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void init()':
Main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for (int i = 1; i < wind.size(); ++i)
      |                     ~~^~~~~~~~~~~~~
Main.cpp: In function 'void solve()':
Main.cpp:124:15: warning: comparison of integer expressions of different signedness: 'lo' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |         if(it != bs.size()-1){
      |            ~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 33
• Subtask 2: 0 / 67