Submission #336245

#TimeUsernameProblemLanguageResultExecution timeMemory
336245beksultan04Bigger segments (IZhO19_segments)C++14
13 / 100
1401 ms57964 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define pii pair<int,int> #define OK puts("OK"); #define fr first #define sc second #define ret return #define scan1(a) scanf("%lld",&a); #define scan2(a,b) scanf("%lld %lld",&a, &b); #define scan3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c); #define all(s) s.begin(),s.end() #define pb push_back #define sz(v) (int)v.size() #define endi puts(""); const int N = 1e6+11,INF=1e9+7; int q[N],ct[N],der[4*N],ans,n,h1[N],h2[N],h3[N],h4[N],dp[N]; vector <pii > v[N]; int rec(int j,int sum,int cnt){ int i; if (j > n){ ret cnt; } int x1 = j+sum*29; x1%=N; int x2 = j+sum*31; x2%=N; int x3 = j+sum*41; x3%=N; int x4 = j*INF+sum; x4%=N; if (h1[x1] == h2[x2] && h2[x2]==h3[x3] && h4[x4]==h3[x3] && h1[x1] == 1){ ret dp[j]; } h1[x1] = h2[x2] =h3[x3] = h4[x4] = 1; int mx=0; for (i=0;i<v[j].size();++i){ if (v[j][i].fr >= sum){ mx = max(mx,rec(v[j][i].sc+1,v[j][i].fr,cnt+1)); } } ret dp[j]=max(mx,dp[j]); } main(){ int i,j; scan1(n) for (i=0;i<N;++i)h1[i]=h2[i]=h3[i]=-1; for (i=1;i<=n;++i){ scan1(q[i]) } for (i=1;i<=n;++i){ int sum=0; for (j=i;j<=n;++j){ sum+=q[j]; v[i].pb({sum,j}); } } cout <<rec(1,0,0);; }

Compilation message (stderr)

segments.cpp: In function 'long long int rec(long long int, long long int, long long int)':
segments.cpp:43:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (i=0;i<v[j].size();++i){
      |              ~^~~~~~~~~~~~
segments.cpp: At global scope:
segments.cpp:51:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   51 | main(){
      |      ^
segments.cpp: In function 'int main()':
segments.cpp:9:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
segments.cpp:53:5: note: in expansion of macro 'scan1'
   53 |     scan1(n)
      |     ^~~~~
segments.cpp:9:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
segments.cpp:56:9: note: in expansion of macro 'scan1'
   56 |         scan1(q[i])
      |         ^~~~~
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