Submission #70048843

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------

int N,M;
ll A[66];
ll ret;
unordered_map<ll,ll> memo0,memo1;

void dfs1(ll sum,int pre,int id) {
	if(id==N/2) {
		memo0[sum]++;
		if(pre==0) memo1[sum]++;
		return;
	}
	dfs1(sum,0,id+1);
	if(pre==0) dfs1((sum+A[id])%M,1,id+1);
}
void dfs2(ll sum,int pre,int id) {
	if(id==N/2-1) {
		if(pre==0) {
			ret+=memo0[(M-sum)%M];
		}
		else {
			ret+=memo1[(M-sum)%M];
		}
		return;
	}
	dfs2(sum,0,id-1);
	if(pre==0) dfs2((sum+A[id])%M,1,id-1);
}

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N>>M;
	FOR(i,N) {
		cin>>A[i];
	}
	
	dfs1(0,0,0);
	dfs2(0,0,N-1);
	
	cout<<ret<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘void solve()’:
Main.cpp:45:15: warning: unused variable ‘j’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |               ^
Main.cpp:45:17: warning: unused variable ‘k’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |                 ^
Main.cpp:45:19: warning: unused variable ‘l’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |                   ^
Main.cpp:45:21: warning: unused variable ‘r’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |                     ^
Main.cpp:45:23: warning: unused variable ‘x’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |                       ^
Main.cpp:45:25: warning: unused variable ‘y’ [-Wunused-variable]
   45 |         int i,j,k,l,r,x,y; string s;
      |                         ^
Main.cpp: In function ‘int main(int, char**)’:
Main.cpp:6:19: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
    6 | #define FOR(x,to) for(x=0;x<(to);x++)
      |                   ^~~
Main.cpp:62:9: note: in expansion of macro ‘FOR’
   62 |         FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
      |         ^~~
Main.cpp:6:19: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
    6 | #define FOR(x,to) for(x=0;x<(to);x++)
      |                   ^~~
Main.cpp:62:45: note: in expansion of macro ‘FOR’
   62 |         FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
      |                                             ^~~
Main.cpp:6:28: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
    6 | #define FOR(x,to) for(x=0;x<(to);x++)
      |                            ^
Main.cpp:62:45: note: in expansion of macro ‘FOR’
   62 |         FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
      |                                             ^~~

Judge Result