Submission #974930

#TimeUsernameProblemLanguageResultExecution timeMemory
974930berrCollecting Stamps 3 (JOI20_ho_t3)C++17
0 / 100
1 ms4440 KiB
#include <bits/stdc++.h> using namespace std; #define int long long const int N=205, INF=1e18; int dp[N][N][2][N]; signed main(){ ios_base::sync_with_stdio(false); cin.tie(0); int n, L; cin >> n >> L; for(int i=0; i<=n; i++){ for(int l=0; l<=n; l++){ for(int j=0; j<2; j++){ for(int x=0; x<=n; x++){ dp[i][l][j][x] = INF; } } } } vector<int> x(n), t(n); for(auto &i: x) cin >> i; for(auto &i: t) cin >> i; dp[0][0][0][(t[0]>=x[0])]=dp[0][0][1][(t[0]>=x[0])]=t[0]; dp[n-1][n-1][0][(t[n-1]>=(L-x[n-1]))]=dp[n-1][n-1][1][(t[n-1]>=(L-x[n-1]))]=L-x[n-1]; auto val=[&](int a, int b){ int dis; if(a==b) return INF; if(b<a) dis=x[b]+L-x[a]; else dis=x[b]-x[a]; if(a<b) dis=min(dis, x[a]+L-x[b]); else dis=min(dis, x[a]-x[b]); return dis; }; auto m=[&](int a){ if(a<0) a+=n; if(a>=n) a-=n; return a; }; int ans=0; for(int i=0; i<n; i++){ for(int l=0; l<n; l++){ for(int j=0; j<2; j++){ for(int x=0; x<n; x++){ int r=m(l+i); int v=dp[l][m(l+i)][j][x]; if(v==INF) continue; ans=max(ans, x); int dis=val((j==0?l:r), m(l-1)); int nex=x+((v+dis)<=t[m(l-1)]); ans=max(ans, nex); dp[m(l-1)][r][0][nex]=min(dp[m(l-1)][r][0][nex], v+dis); dis=val((j==0?l:r), m(r+1)); nex=x+((v+dis)<=t[m(r+1)]); ans=max(ans, nex); dp[l][m(r+1)][1][nex]=min(dp[l][m(r+1)][1][nex], v+dis); } } } } cout<<ans; }

Compilation message (stderr)

ho_t3.cpp: In lambda function:
ho_t3.cpp:43:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   43 |         if(a<0) a+=n; if(a>=n) a-=n;
      |         ^~
ho_t3.cpp:43:23: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   43 |         if(a<0) a+=n; if(a>=n) a-=n;
      |                       ^~
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