Submission #938950

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
938950	2024-03-06 01:18:17	jeroenodb	Catfish Farm (IOI22_fish)	C++17	100 / 100	142 ms	30432 KiB

fish

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#include "fish.h"
#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const ll oo = 1e18;
void cmax(ll& a, ll b) {a=max(a,b);}
ll max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) {
    vvi ys(N+1);
    ll total=0;
    for(int i=0;i<M;++i) {
        Y[i]++,X[i]++;
        total+=W[i];
        ys[X[i]].push_back(i);
    }
    vector<vector<ll>> pref(N+1,{0});
    { // preprocessing and coordinate compression.
    int x=0;
    for(auto& v : ys) {
        sort(all(v),[&](int i, int j) {return Y[i]<Y[j];});
        for(auto& id : v) {
            pref[x].push_back(W[id]);
            id = Y[id];
        }
        pref[x].push_back(0);
 
 
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