Submission #1067904

#TimeUsernameProblemLanguageResultExecution timeMemory
106790412345678Wombats (IOI13_wombats)C++17
28 / 100
2460 ms147144 KiB
#include "wombats.h" #include <bits/stdc++.h> using namespace std; const int nx=5e3+5, cx=1e2+5; int r, c, ver[nx][cx], qs[nx][cx], dp[nx][cx]; int dist(int row, int a, int b) { if (b>=a) return ver[row][a]+qs[row][b]-qs[row][a]; else return ver[row][a]+qs[row][a]-qs[row][b]; } struct segtree { struct matrix { int mat[cx][cx]; void build(int row) { for (int i=0; i<c; i++) for (int j=0; j<c; j++) mat[i][j]=dist(row, j, i); } } d[3*nx]; void merge(int l, int r, int idx) { for (int i=0; i<c; i++) for (int j=0; j<c; j++) d[idx].mat[i][j]=1e9; for (int i=0; i<c; i++) for (int j=0; j<c; j++) for (int k=0; k<c; k++) d[idx].mat[i][j]=min(d[idx].mat[i][j], d[2*idx+1].mat[i][k]+d[2*idx].mat[k][j]); } void build(int l, int r, int i) { if (l==r) return d[i].build(l), void(); int md=(l+r)/2; build(l, md, 2*i); build(md+1, r, 2*i+1); merge(l, r, i); } void update(int l, int r, int i, int idx) { if (idx<l||r<idx) return; if (l==r) return d[i].build(idx), void(); int md=(l+r)/2; update(l, md, 2*i, idx); update(md+1, r, 2*i+1, idx); merge(l, r, i); } } s; void init(int R, int C, int H[5000][200], int V[5000][200]) { r=R, c=C; for (int i=0; i<R-1; i++) for (int j=0; j<C; j++) ver[i+1][j]=V[i][j]; for (int i=0; i<R; i++) for (int j=0; j<C-1; j++) qs[i][j+1]=H[i][j]+qs[i][j]; s.build(1, r-1, 1); } void changeH(int P, int Q, int W) { int lst=qs[P][Q+1]-qs[P][Q]; int delta=W-lst; for (int i=Q+1; i<c; i++) qs[P][i]+=delta; if (P>0) s.update(1, r-1, 1, P); } void changeV(int P, int Q, int W) { ver[P+1][Q]=W; s.update(1, r-1, 1, P+1); } int escape(int V1, int V2) { vector<int> tmp; int res=1e9; for (int i=0; i<c; i++) res=min(res, s.d[1].mat[V2][i]+dist(0, V1, i)); return res; }

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;
      |      ^~~
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