Submission #781867

#	Time	Username	Problem	Language	Result	Execution time	Memory
781867		YassineBenYounes	Two Currencies (JOI23_currencies)	C++17	0 / 100	11 ms	19100 KiB

currencies

#include<bits/stdc++.h>
typedef long long ll;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<pair<ll, ll>, null_type, less<pair<ll,ll>>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
////////////////////Only Clear Code//////////////////////////
#define int ll
void usaco_problem(){
    freopen("milkvisits.in", "r", stdin);
    freopen("milkvisits.out", "w", stdout);
}

void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}

const int mx = (1e5+5)*4;
const int LOG = 25;
const ll inf = 1e18;
const ll mod = 1e8;

ll obstacles[mx];
int m;
vector<ll> pf[mx];
vector<pair<ll, ll>> segtree[mx];
vector<pair<ll, ll>> v;

void merge(int node){
    int a = node*2;
    int b = a+1;
    int i = 0, j = 0;
    int n = segtree[a].size();
    int m = segtree[b].size();
    while(i < n && j < m){
        if(segtree[a][i] < segtree[b][j]){
            segtree[node].push_back(segtree[a][i]);
            i++;
        }
        else{
            segtree[node].push_back(segtree[b][j]);
            j++;
        }
    }
    while(i < n){
        segtree[node].push_back(segtree[a][i]);
        i++;
    }
    while(j < m){
        segtree[node].push_back(segtree[b][j]);
        j++;
    }
    pf[node].push_back(segtree[node][0].second);
    for(ll i = 1; i < segtree[node].size();i++){
        pf[node].push_back(pf[node].back() + segtree[node][i].second);
    }
}

void build(ll node, ll l, ll r) {
    if (l == r){
        pf[node].push_back(v[l].first);
        segtree[node] = vector<pair<ll, ll>>(1, {v[l].second, v[l].first});
        return;
    }
    ll md = (l + r) / 2;
    build(node*2, l, md);
    build(node*2+1, md+1, r);
    merge(node);
}

ll bn(vector<pair<ll, ll>> &v, pair<ll, ll> p){
    ll l = 0, r = v.size()-1;
    ll ans = v.size();
    while(l <= r){
        int md = (l+r)/2;
        if(v[md] >= p){
            ans = md;
            r = md-1;
        }
        else{
            l = md+1;
        }
    }
}

ll query(ll node, ll qlow, ll qhigh, ll l, ll r, ll silver){
    if(node >= m){
        ll ind1 = bn(segtree[node], {qlow, (ll)0});
        ll ind2 = bn(segtree[node], {qhigh, (ll)1e9});
        if(ind2 == segtree[node].size() || segtree[node][ind2].first > qhigh)ind2--;
        ll sum = 0;
        if(ind1<=ind2)sum = pf[node][ind2] - (ind1 == 0 ? 0 : pf[node][ind1-1]);
        ll sz = ind2-ind1+1;
        if(ind1>ind2)sz = 0;
        if(silver >= sum){
            return sz;
        }
        return 0;
    }

    ll md = (l+r)/2;
    // sum on left
    ll ind1 = bn(segtree[node*2], {qlow, 0});
    ll ind2 = bn(segtree[node*2], {qhigh, 1e9});
    if(ind2 == segtree[node*2].size() || segtree[node*2][ind2].first > qhigh)ind2--;
    ll suml = 0;
    //cout << node << " " << ind1 << " " << ind2 << endl;
    if(ind1<=ind2)suml = pf[node*2][ind2] - (ind1 == 0 ? 0 : pf[node*2][ind1-1]);
    //cout << node << " " << suml << " " << silver << endl;
    if(suml >= silver){
        return query(node*2, qlow, qhigh, l, md, silver);
    }
    ll sz = ind2-ind1+1;
    if(ind1>ind2)sz = 0;
    return sz + query(node*2+1, qlow, qhigh, md+1, r, silver-suml);
}

int _count(int n){
    int c = 0;
    while(n > 0){
        c+= (n&1);
        n/=2;
    }
    return c;
}

void run_case(){
    int n, q;cin >> n >> m >> q;
    for(int i = 0; i < n-1;i++){
        ll a, b;cin >> a >> b;
    }
    for(int i = 0; i < m;i++){
        ll a, b;cin >> a >> b;a--;
        v.push_back({b, a});
        obstacles[a]++;
    }
    for(int i = 1; i < n;i++){
        obstacles[i] += obstacles[i-1];
    }
    sort(v.begin(), v.end());
    while(_count(m) != 1){
        m++;
        v.push_back({1e9, 1e9});
    }
    build(1, 0, m-1);
    for(int i = 0; i < q;i++){
        ll a, b, gold, silver;cin >> a >> b >> gold >> silver;
        a--;b--;
        if(b < a)swap(a, b);
        b--;
        if(b < a){
            cout << gold << endl;
            continue;
        }
        ll x = query(1, a, b, 0, m-1, silver);
        ll tot = obstacles[b] - (a == 0 ? 0 : obstacles[a-1]);
        gold -= max(tot - x, (ll)0);
        //cout << x << " " << tot << endl;
        cout << gold << endl;
    }
}

int32_t main(){
    speed;
    int t = 1;
    //cin >> t;
    while(t--){
        run_case();
    }
}

/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
    Your Guide when stuck:
    - Continue keyword only after reading the whole input
    - Don't use memset with testcases
    - Check for corner cases(n=1, n=0)
    - Check where you declare n(Be careful of declaring it globally and in main)
*/

Compilation message (stderr)

currencies.cpp: In function 'void merge(ll)':
currencies.cpp:62:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(ll i = 1; i < segtree[node].size();i++){
      |                   ~~^~~~~~~~~~~~~~~~~~~~~~
currencies.cpp: In function 'll bn(std::vector<std::pair<long long int, long long int> >&, std::pair<long long int, long long int>)':
currencies.cpp:81:8: warning: variable 'ans' set but not used [-Wunused-but-set-variable]
   81 |     ll ans = v.size();
      |        ^~~
currencies.cpp:92:1: warning: no return statement in function returning non-void [-Wreturn-type]
   92 | }
      | ^
currencies.cpp: In function 'll query(ll, ll, ll, ll, ll, ll)':
currencies.cpp:98:17: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |         if(ind2 == segtree[node].size() || segtree[node][ind2].first > qhigh)ind2--;
      |            ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:113:13: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |     if(ind2 == segtree[node*2].size() || segtree[node*2][ind2].first > qhigh)ind2--;
      |        ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp: In function 'void usaco_problem()':
currencies.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp: In function 'void init()':
currencies.cpp:19:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:21:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 28
• Subtask 3: 0 / 30
• Subtask 4: 0 / 32