oj.uz

Submission #488674

# Submission time Handle Problem Language Result Execution time Memory
488674 2021-11-20T00:38:50 Z i_am_noob Sparklers (JOI17_sparklers) C++17
50 / 100
 104 ms 5460 KB 
#pragma GCC target("avx2")
#include<bits/stdc++.h>
//#include<x86intrin.h>
//#include<immintrin.h>
//#pragma GCC optimize("unroll-loops")
using namespace std;

#define ll long long
#define int ll
#define ull unsigned long long
#define ld long double
#define rep(a) rep1(i,a)
#define rep1(i,a) rep2(i,0,a)
#define rep2(i,b,a) for(int i=(b); i<((int)(a)); i++)
#define rep3(i,b,a) for(int i=(b); i>=((int)(a)); i--)
#define all(a) a.begin(),a.end()
#define pii pair<int,int>
#define pb push_back
//#define inf 1010000000
#define inf 4000000000000000000
#define eps 1e-9
#define sz(a) ((int)a.size())
#define pow2(x) (1ll<<(x))
//#define ceiling(a,b) (((a)+(b)-1)/(b))
#ifdef i_am_noob
#define bug(...) cerr << "#" << __LINE__ << ' ' << #__VA_ARGS__ << "- ", _do(__VA_ARGS__)
template<typename T> void _do(T && x) {cerr << x << endl;}
template<typename T, typename ...S> void _do(T && x, S&&...y) {cerr << x << ", "; _do(y...);}
#else
#define bug(...) 826
#endif

inline char readchar(){
    const int maxn=1000000;
    static char buf[maxn],*p=buf,*q=buf;
    if(p==q&&(q=(p=buf)+fread(buf,1,maxn,stdin))==buf) return EOF;
    else return *p++;
}
inline int readint(){
    int c=readchar(),x=0,neg=0;
    while((c<'0'||c>'9')&&c!='-'&&c!=EOF) c=readchar();
    if(c=='-') neg=1,c=readchar();
    while(c>='0'&&c<='9') x=(x<<3)+(x<<1)+(c^'0'),c=readchar();
    return neg?-x:x;
}

const int Mod=1000000007,Mod2=998244353;
const int MOD=Mod;
const int maxn=100005;
//i_am_noob
//#define v8si __attribute__ (( vector_size(32) )) signed
int n,k,s,a[maxn];

pii Merge(pii x, pii y){
    return {max(x.first,y.first-x.second),x.second+y.second};
}

void orzck(){
    cin >> n >> k >> s;
    k--;
    rep(n) cin >> a[i];
    int l=0,r=490e8/s;
    while(l<r){
        int mid=l+r>>1;
        vector<int> vec1={0},vec2={0};
        rep3(i,k-1,0) vec1.pb(2*s*mid-(a[i+1]-a[i]));
        rep2(i,k+1,n) vec2.pb(2*s*mid-(a[i]-a[i-1]));
        rep2(i,1,sz(vec1)) vec1[i]+=vec1[i-1];
        rep2(i,1,sz(vec2)) vec2[i]+=vec2[i-1];
        bool dp[1005][1005];
        dp[0][0]=1;
        rep2(i,1,sz(vec1)) dp[0][i]=dp[0][i-1]&&(vec1[i]>=0);
        bug(mid);
        rep2(i,1,sz(vec2)) rep1(j,sz(vec1)){
            dp[i][j]=dp[i-1][j]&&(vec2[i]+vec1[j]>=0);
            if(j) dp[i][j]|=dp[i][j-1]&&(vec2[i]+vec1[j]>=0);
            bug(i,j,dp[i][j]);
        }
        if(dp[sz(vec2)-1][sz(vec1)-1]) r=mid;
        else l=mid+1;
        continue;
        bool flag=1;
        if(*min_element(all(vec1))+*max_element(all(vec2))<0) flag=0;
        if(*max_element(all(vec1))+*min_element(all(vec2))<0) flag=0;
        if(!flag){
            l=mid+1;
            continue;
        }
        int cur=1,maxx=vec1[0];
        rep(sz(vec2)){
            if(maxx+vec2[i]<0){
                flag=0;
                break;
            }
            while(cur<sz(vec1)&&vec1[cur]+vec2[i]>=0) maxx=max(maxx,vec1[cur]),cur++;
            if(cur==sz(vec1)) break;
        }
        reverse(all(vec1));
        reverse(all(vec2));
        cur=1,maxx=vec1[0];
        rep(sz(vec2)){
            if(maxx+vec2[i]<0){
                flag=0;
                break;
            }
            while(cur<sz(vec1)&&vec1[cur]+vec2[i]>=0) maxx=max(maxx,vec1[cur]),cur++;
            if(cur==sz(vec1)) break;
        }
        if(flag) r=mid;
        else l=mid+1;
    }
    cout << l << "\n";
}

signed main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    #ifdef i_am_noob
    freopen("input1.txt","r",stdin);
    freopen("output1.txt","w",stdout);
    freopen("output2.txt","w",stderr);
    #endif
    cout << fixed << setprecision(15);
    orzck();
    return 0;
}

Compilation message

sparklers.cpp: In function 'void orzck()':
sparklers.cpp:64:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   64 |         int mid=l+r>>1;
      |                 ~^~
sparklers.cpp:30:18: warning: statement has no effect [-Wunused-value]
   30 | #define bug(...) 826
      |                  ^~~
sparklers.cpp:73:9: note: in expansion of macro 'bug'
   73 |         bug(mid);
      |         ^~~
sparklers.cpp:30:18: warning: statement has no effect [-Wunused-value]
   30 | #define bug(...) 826
      |                  ^~~
sparklers.cpp:77:13: note: in expansion of macro 'bug'
   77 |             bug(i,j,dp[i][j]);
      |             ^~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1228 KB Output is correct
2 Correct 1 ms 1228 KB Output is correct
3 Correct 1 ms 1228 KB Output is correct
4 Correct 1 ms 1292 KB Output is correct
5 Correct 1 ms 1228 KB Output is correct
6 Correct 1 ms 1228 KB Output is correct
7 Correct 1 ms 1228 KB Output is correct
8 Correct 1 ms 1228 KB Output is correct
9 Correct 1 ms 1228 KB Output is correct
10 Correct 1 ms 1228 KB Output is correct
11 Correct 1 ms 1228 KB Output is correct
12 Correct 1 ms 1228 KB Output is correct
13 Correct 1 ms 1228 KB Output is correct
14 Correct 1 ms 1228 KB Output is correct
15 Correct 1 ms 1228 KB Output is correct
16 Correct 1 ms 1228 KB Output is correct
17 Correct 1 ms 1228 KB Output is correct
18 Correct 1 ms 1228 KB Output is correct
19 Correct 1 ms 1228 KB Output is correct
20 Correct 1 ms 1316 KB Output is correct
21 Correct 1 ms 1232 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1228 KB Output is correct
2 Correct 1 ms 1228 KB Output is correct
3 Correct 1 ms 1228 KB Output is correct
4 Correct 1 ms 1292 KB Output is correct
5 Correct 1 ms 1228 KB Output is correct
6 Correct 1 ms 1228 KB Output is correct
7 Correct 1 ms 1228 KB Output is correct
8 Correct 1 ms 1228 KB Output is correct
9 Correct 1 ms 1228 KB Output is correct
10 Correct 1 ms 1228 KB Output is correct
11 Correct 1 ms 1228 KB Output is correct
12 Correct 1 ms 1228 KB Output is correct
13 Correct 1 ms 1228 KB Output is correct
14 Correct 1 ms 1228 KB Output is correct
15 Correct 1 ms 1228 KB Output is correct
16 Correct 1 ms 1228 KB Output is correct
17 Correct 1 ms 1228 KB Output is correct
18 Correct 1 ms 1228 KB Output is correct
19 Correct 1 ms 1228 KB Output is correct
20 Correct 1 ms 1316 KB Output is correct
21 Correct 1 ms 1232 KB Output is correct
22 Correct 9 ms 1332 KB Output is correct
23 Correct 6 ms 1232 KB Output is correct
24 Correct 3 ms 1316 KB Output is correct
25 Correct 2 ms 1232 KB Output is correct
26 Correct 10 ms 1232 KB Output is correct
27 Correct 10 ms 1232 KB Output is correct
28 Correct 21 ms 1348 KB Output is correct
29 Correct 19 ms 1352 KB Output is correct
30 Correct 13 ms 1344 KB Output is correct
31 Correct 12 ms 1348 KB Output is correct
32 Correct 19 ms 1352 KB Output is correct
33 Correct 18 ms 1232 KB Output is correct
34 Correct 10 ms 1232 KB Output is correct
35 Correct 19 ms 1340 KB Output is correct
36 Correct 6 ms 1232 KB Output is correct
37 Correct 10 ms 1348 KB Output is correct
38 Correct 22 ms 1352 KB Output is correct
39 Correct 4 ms 1232 KB Output is correct
40 Correct 17 ms 1340 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1228 KB Output is correct
2 Correct 1 ms 1228 KB Output is correct
3 Correct 1 ms 1228 KB Output is correct
4 Correct 1 ms 1292 KB Output is correct
5 Correct 1 ms 1228 KB Output is correct
6 Correct 1 ms 1228 KB Output is correct
7 Correct 1 ms 1228 KB Output is correct
8 Correct 1 ms 1228 KB Output is correct
9 Correct 1 ms 1228 KB Output is correct
10 Correct 1 ms 1228 KB Output is correct
11 Correct 1 ms 1228 KB Output is correct
12 Correct 1 ms 1228 KB Output is correct
13 Correct 1 ms 1228 KB Output is correct
14 Correct 1 ms 1228 KB Output is correct
15 Correct 1 ms 1228 KB Output is correct
16 Correct 1 ms 1228 KB Output is correct
17 Correct 1 ms 1228 KB Output is correct
18 Correct 1 ms 1228 KB Output is correct
19 Correct 1 ms 1228 KB Output is correct
20 Correct 1 ms 1316 KB Output is correct
21 Correct 1 ms 1232 KB Output is correct
22 Correct 9 ms 1332 KB Output is correct
23 Correct 6 ms 1232 KB Output is correct
24 Correct 3 ms 1316 KB Output is correct
25 Correct 2 ms 1232 KB Output is correct
26 Correct 10 ms 1232 KB Output is correct
27 Correct 10 ms 1232 KB Output is correct
28 Correct 21 ms 1348 KB Output is correct
29 Correct 19 ms 1352 KB Output is correct
30 Correct 13 ms 1344 KB Output is correct
31 Correct 12 ms 1348 KB Output is correct
32 Correct 19 ms 1352 KB Output is correct
33 Correct 18 ms 1232 KB Output is correct
34 Correct 10 ms 1232 KB Output is correct
35 Correct 19 ms 1340 KB Output is correct
36 Correct 6 ms 1232 KB Output is correct
37 Correct 10 ms 1348 KB Output is correct
38 Correct 22 ms 1352 KB Output is correct
39 Correct 4 ms 1232 KB Output is correct
40 Correct 17 ms 1340 KB Output is correct
41 Runtime error 104 ms 5460 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -