#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 = 1011589,INF=1e9+7;
int q[N],ct[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 x2 = j+(sum*31)%N;
x2%=N;
int x3 = j+(sum*41)%N;
x3%=N;
int x4 = cnt+j*57+(sum*57*57)%N;
x4%=N;
if (h2[x2]==h3[x3] && h4[x4]==h3[x3] && h1[x1] == 1){
ret dp[j];
}
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[x4]=max(mx,dp[x4]);
}
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
segments.cpp: In function 'long long int rec(long long int, long long int, long long int)':
segments.cpp:36:48: error: 'x1' was not declared in this scope; did you mean 'x4'?
36 | if (h2[x2]==h3[x3] && h4[x4]==h3[x3] && h1[x1] == 1){
| ^~
| x4
segments.cpp:41:15: 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]
41 | for (i=0;i<v[j].size();++i){
| ~^~~~~~~~~~~~
segments.cpp: At global scope:
segments.cpp:49:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
49 | 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:51:5: note: in expansion of macro 'scan1'
51 | 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:54:9: note: in expansion of macro 'scan1'
54 | scan1(q[i])
| ^~~~~
