Submission #2408574

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Source Code Expand

//Create Time: 2018-04-24 10:17:54
#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <cstdlib>
#include <sstream>
#include <fstream>
#include <functional>
#include <list>
#include <deque>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <bitset>
#include <cctype>
#include <ctime>
#include <utility>
#include <complex>
#include <cassert>
#include <climits>
#include <iterator>
#include <tuple>
using namespace std;
#define snuke(i,x) for (__typeof((x).begin()) i = (x).begin(); i != (x).end(); ++i)
#define rep(i,a,n) for (int i=(a);i<(n);i++)
#define per(i,n,a) for (int i=(n)-1;i>=(a);i--)
// #define OUT(x) std::cout<<(#x)<<":"<<(x)<<std::endl
// #define TST(x) std::cout<<(#x)<<":"<<(x)<<" "
#define OUT(args...) {string _s=#args;replace(_s.begin(),_s.end(),',',' ');stringstream _ss(_s);istream_iterator<string> _it(_ss);OUT_TST("\n",_it,args);}
#define TST(args...) {string _s=#args;replace(_s.begin(),_s.end(),',',' ');stringstream _ss(_s);istream_iterator<string> _it(_ss);OUT_TST("",_it,args);}
#define SZ(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
#define unq(x) sort(all(x)),(x).erase(unique(all(x)),(x).end())
#define mem(f,x) memset((f), (x), sizeof(f))
#define clr(f) mem(f,0)
#define x first
#define y second
#define mp make_pair
#define pb push_back
#define mt make_tuple
#define eb emplace_back
#define DEBUG
void OUT_TST(string s,istream_iterator<string> it) {cerr<<s;}
template<typename T, typename... Args> void OUT_TST(string s,istream_iterator<string> it,T a,Args... args){cerr<<*it<<"="<<a<<" ";OUT_TST(s,++it,args...);}
template<class T> void rd(T&ret){ret=0;bool ok=0,u=0;for(;;){int c=getchar();if(c>='0'&&c<='9')ret=(ret<<3)+(ret<<1)+c-'0',ok=1;else if(c=='-')u=1;else if(ok){if(u)ret*=-1;return;}}}
long long powmod(long long p,long long n,long long mod){long long ret=1;for(;n;n>>=1){if(n&1)ret=ret*p%mod;p=p*p%mod;}return ret;}
template <class T> bool chmin(T& a, const T &b) {return b < a? a = b, 1: 0;}
template <class T> bool chmax(T& a, const T &b) {return b > a? a = b, 1: 0;}
int gcd(int a,int b){return b?gcd(b,a%b):a;}
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii > vii;
/****head****/
ll a,b,p;
void small(){
    set<ll> hs;
    ll ans=0;
    for(ll i=1,j;i<=p;++i){
        if(i==a)continue;
        j=p/i;
        if(i*j==p)--j;
        while(hs.find(j)!=hs.end() || j==b)--j;
        if(j<=0)continue;
        ++ans;
        hs.insert(j);
    }
    cout<<ans<<endl;
}
int main(){
    int _;scanf("%d",&_);
    while(_--){
        cin>>a>>b; p=a*b;
        if(p<9) {small();continue;}
        ll t=ll(sqrt(p-2.0));while((t+1ll)*(t+1ll)<=p)++t;
        ll ans=(t-1)*2;
        if(a<t)--ans;
        if(b<t)--ans;
        if(t*t!=p){
            ll x=p/t;
            assert(x>=t && x<=t+2);
            if(x==t){
                if(t*t<p && t!=a && t!=b) ++ans;
            } else if(x==t+1){
                if(t*(t+1)==p){
                    if(t!=a && t!=b) ++ans;
                } else{
                    if(a==t){
                        if(b!=t)++ans;
                    } else if(a==t+1){
                        ++ans;
                    } else if(b==t || b==t+1){
                        ++ans;
                    } else ans+=2;
                }
            } else {
                assert(t*(t+2)==p);
                if(a==t){
                    if(b!=t)++ans;
                } else if(a==t+1){
                    ++ans;
                } else if(b==t || b==t+1){
                    ++ans;
                } else ans+=2;
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:76:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int _;scanf("%d",&_);
                         ^

Judge Result