Submission #290491

#	Time	Username	Problem	Language	Result	Execution time	Memory
290491		fivefourthreeone	Wombats (IOI13_wombats)	C++17	100 / 100	4756 ms	183672 KiB

wombats

#include "wombats.h"
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
#define owo(i,a, b) for(auto i=(a);i<(b); ++i)
#define uwu(i,a, b) for(auto i=(a)-1; i>=(b); --i)
#define senpai push_back
#define ttgl pair<int, int>
#define ayaya cout<<"ayaya~"<<endl
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<ttgl, null_type,less<ttgl>, rb_tree_tag,tree_order_statistics_node_update>*/
 
using ll = long long;
using ld = long double;
const ll MOD = 998244353;
const ll root = 62;
int gcd(int a,int b){return b?gcd(b,a%b):a;}
ll binpow(ll a,ll b){ll res=1;while(b){if(b&1)res=(res*a)%MOD;a=(a*a)%MOD;b>>=1;}return res;}
ll modInv(ll a){return binpow(a, MOD-2);}
const double PI = acos(-1);
const double eps = 1e-6;
const int INF = 0x3f3f3f3f;
const int NINF = 0xc0c0c0c0;
const ll INFLL = 0x3f3f3f3f3f3f3f3f;
const ll NINFLL = 0xc0c0c0c0c0c0c0c0;
const int mxR = 5000;
const int mxC = 200;
const int BLOCK = 10;
const int sgsz = 500;
int h[mxR][mxC], v[mxR][mxC], seg[1024][mxC][mxC], opt[mxC + 1];
void upd(int l, int r, int le = 0, int rr = sgsz-1, int i = 1) {
    if(le > r||rr < l)return;
    if(le==rr) {
        //brute force this BLOCK
        memset(seg[i], INF, sizeof(seg[i]));
        owo(j, 0, mxC) {
            seg[i][j][j] = 0;
            owo(k, le*BLOCK, le*BLOCK + BLOCK) {
                owo(b, 1, mxC) {
                    seg[i][j][b] = min(seg[i][j][b], seg[i][j][b-1] + h[k][b-1]);
                }
                uwu(b, mxC, 1) {
                    seg[i][j][b-1] = min(seg[i][j][b-1], seg[i][j][b] + h[k][b-1]);
                }
                owo(b, 0, mxC) {
                    seg[i][j][b] += v[k][b];
                }
            }
        }
        return;
    }
    int mid = (le + rr) >> 1;
    upd(l, r, le, mid, 2*i);
    upd(l, r, mid+1, rr, 2*i+1);
    memset(opt, 0, 4*mxC);
    owo(j, 0, mxC) {
        for(int k = mxC - 1; ~k; --k) {
            ttgl best = {INF, 0};
            owo(b, opt[k], opt[k+1] + 1) {
                best = min(best, {seg[2*i][j][b] + seg[2*i+1][b][k], -b});
            }
            seg[i][j][k] = best.first;
            opt[k] = -best.second;
        }
    }
}
void init(int r, int c, int H[5000][200], int V[5000][200]) {
    memset(h, INF, sizeof(h));
    owo(i, 0, r) {
        owo(j, 0, c-1) {
            h[i][j] = H[i][j];
        }
    }
    owo(i, 0, r-1) {
        owo(j, 0, c) {
            v[i][j] = V[i][j];
        }
    }
    opt[mxC] = mxC-1;
    upd(0, sgsz-1);
}
void changeH(int p, int q, int w) {
    h[p][q] = w;
    upd(p/BLOCK, p/BLOCK);
}
void changeV(int p, int q, int w) {
    v[p][q] = w;
    upd(p/BLOCK, p/BLOCK);
}
int escape(int a, int b) {
    return seg[1][a][b];
}
/*int hh[5000][200];
int vv[5000][200];
int main() {
    freopen("file.in", "r", stdin);
    //freopen("file.out", "w", stdout);
    mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
    cin.tie(0)->sync_with_stdio(0);
    int r, c;
    int q;
    cin>>r>>c;
    owo(i, 0, r) {
        owo(j, 0, c-1) {
            cin>>hh[i][j];
        }
    }
    owo(i, 0, r-1) {
        owo(j, 0, c) {
            cin>>vv[i][j];
        }
    }
    int type;
    init(r, c, hh, vv);
    cin>>q;
    int x, y, z;
    while(q--) {
        cin>>type;
        if(type==1) {
            cin>>x>>y>>z;
            changeH(x, y, z);
        }else if(type==2) {
            cin>>x>>y>>z;
            changeV(x, y, z);
        }else {
            cin>>x>>y;
            cout<<escape(x, y)<<"\n";
        }
    }
    return 0;
}*/

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
wombats.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("O3")
      | 
wombats.cpp:4: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    4 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 21 / 21
• Subtask 6: 24 / 24