Submission #1265522

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265522		herominhsteve	Multiplication (BOI24_multiplication)	C++20	100 / 100	1 ms	328 KiB

Main

#include <bits/stdc++.h>
#define el '\n'
#define FNAME "NAME"
#define allof(x) x.begin(),x.end()
#define allof1(x) x.begin()+1,x.end()
#define mset(x,n) memset(x,(n),sizeof(x))
using namespace std;
const long long MOD = (long long) 1e9+7;
template<class X,class Y> bool minimize(X &a,Y b){ if (a>b) {a=b; return true;} return false;}
template<class X,class Y> bool maximize(X &a,Y b){ if (a<b) {a=b; return true;} return false;}

void setup(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
	if (fopen(FNAME".inp","r")){
		freopen(FNAME".inp","r",stdin);
		freopen(FNAME".out","w",stdout);
	}
}

long long indianmul(long long a, long long b){
	if (!b) return 0ll;
	long long x = indianmul(a,b/2);
	x = (x%MOD + x%MOD)%MOD;
	if (b&1) return (a%MOD + x)%MOD;
	return x;
}

int n;

void init(){
	cin>>n;
}

void sol(){
	long long res = 1;
	for (int i=1;i<=n;i++){
		long long x; cin>>x;
		res = indianmul(res,x);
	}
	cout<<res;
}

int main(){
    setup();
    init();
    sol();
}

Compilation message (stderr)

Main.cpp: In function 'void setup()':
Main.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |                 freopen(FNAME".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:17:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |                 freopen(FNAME".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 35 / 35
• Subtask 2: 64 / 64
• Subtask 3: 1 / 1