Submission #1019961

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019961		YassineBenYounes	Fish 3 (JOI24_fish3)	C++17	0 / 100	2084 ms	60268 KiB

Main

#include<bits/stdc++.h>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1};
int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1};
#define endl "\n"
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
////////////////////Only Clear Code//////////////////////////
 
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 = 3005;
const int LOG = 25;
const int inf = 1e9;
const ll mod = 998244353;
#define int ll
ll arr[mx];
int nxt[mx];
ll tmp[mx], cop[mx];

int ind[mx][mx];

int32_t main(){
    speed;
    ll d;
    int n;cin >> n >> d;
    for(int i = 0; i < n;i++){
        cin >> arr[i];
    }
    for(int i = 0; i < n;i++){
        ind[i][i] = i;
        for(int j = i+1;j < n;j++){
            if(arr[ind[i][j-1]] < arr[j]){
                ind[i][j] = ind[i][j-1];
            }
            else{
                ind[i][j] = j;
            }
        }
    }
    int q;cin >> q;
    while(q--){
        int l, r;cin >> l >> r;l--;r--;
        ll done = 0;
        bool ok = 1;
        for(int i = l;i <= r;i++){
            cop[i] = arr[i];
            tmp[i] = arr[i] % d;
        }
        for(int i = l;i <= r;i++){
            tmp[i] -= done;
            tmp[i] %= mod;
            while(tmp[i] < 0)tmp[i] += d;
            done += tmp[i];
            cop[i] -= done;
            if(done > arr[i]){ok = 0;break;}
        }
        if(!ok){
            cout << -1 << endl;
            continue;
        }
        for(int i = l;i <= r;i++){
            cop[i] = cop[i]/d;
            //cout << cop[i] << endl;
        }
        int st = l, en = r;
        ll cur = 0;
        while(st <= en){
            int k = ind[st][en];
            cur = cop[k];
            for(int i = st; i <= k;i++){
                cop[i] -= cur;
            }
            st = k+1;
        }
        //cout << endl;
        ll ans = 0;
        for(int i = l;i <= r;i++){
            ans += cop[i];
            //cout << cop[i] << endl;
        }
        cout << ans << endl;
    }
}
 
/*
    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)

Main.cpp: In function 'void usaco_problem()':
Main.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'void init()':
Main.cpp:40:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:42:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36