提出 #1208368

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ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd pair<double,double>
#define X first
#define Y second
#define REP(i,a) for(int i=0;i<a;++i)
#define REPP(i,a,b) for(int i=a;i<b;++i)
#define FILL(a,x) memset(a,x,sizeof(a))
#define foreach( gg,itit )  for( typeof(gg.begin()) itit=gg.begin();itit!=gg.end();itit++ )
#define mp make_pair
#define pb push_back
#define all(s) s.begin(),s.end()
#define sz(s) (int)s.size()
#define present(c,x) ((c).find(x) != (c).end())
const double EPS = 1e-8;
const int mod = 1e9+7;
const int N = 1e6+10;
const ll INF = 1e18;

ll power(ll x,ll y){
	ll t=1;
	while(y>0){
		if(y%2) y-=1,t=t*x%mod;
		else y/=2,x=x*x%mod;
	}
return t;
}

vector <ll> vx,vy;

int main(){
	int n,m;
	ll x,y,ysum=0,xsum=0,pref=0;
	scanf("%d%d",&n,&m);
	REP(i,n){
		scanf("%lld",&x);
		vx.pb(x);
	}
	sort(all(vx));
	REP(i,m){
		scanf("%lld",&x);
		vy.pb(x);
	}
	sort(all(vy));
	REP(i,n){
		xsum+=(i*vx[i]-pref+mod);
		xsum%=mod;
		pref=(pref+vx[i]+mod)%mod;
	}
	pref=0;
	REP(i,m){
		ysum+=(i*vy[i]-pref+mod);
		ysum%=mod;
		pref=(pref+vy[i]+mod)%mod;
	}
	printf("%lld\n",(xsum*ysum)%mod);
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:37:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:39:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&x);
                   ^
./Main.cpp:44:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&x);
                   ^

ジャッジ結果