#include <bits/stdc++.h>
using namespace std;
const long long mod = 1000000007;
struct m{
long long a;
m(long long x = 0){
a = x;
}
m operator - (m x) const {
m ret = {a};
ret.a = (ret.a - x.a + mod) % mod;
return ret;
}
m operator - (long long x) const {
m ret = {a};
ret.a = (ret.a - x + mod) % mod;
return ret;
}
m operator + (long long x) const {
m ret = {a};
ret.a = (ret.a + x) % mod;
return ret;
}
m operator * (long long x) const {
m ret = {a};
ret.a = (ret.a * x) % mod;
return ret;
}
m operator + (m x) const {
m ret = {a};
ret.a = (ret.a + x.a) % mod;
return ret;
}
m operator * (m x) const {
m ret = {a};
ret.a = ret.a * x.a % mod;
return ret;
}
m operator % (m x) const {
m ret = {a};
ret.a = ret.a % x.a % mod;
return ret;
}
m operator % (long long x) const {
m ret = {a};
ret.a = ret.a % x % mod;
return ret;
}
m operator = (long long x){
a = x;
return *this;
}
m operator = (m x){
a = x.a;
return *this;
}
m operator = (int x){
a = x;
return *this;
}
bool operator < (long long x) const {
return a < x;
}
bool operator < (m x) const {
return a < x.a;
}
bool operator == (long long x) const {
return a == x;
}
bool operator == (m x) const {
return a == x.a;
}
bool operator != (long long x) const {
return a != x;
}
bool operator != (m x) const {
return a != x.a;
}
bool operator >= (long long x) const {
return a >= x;
}
bool operator >= (m x) const {
return a >= x.a;
}
void print(){
cout << a;
}
};
void print(vector<m> f){
for(m i = 0; i < f.size(); i = i+1){
// cout << f[i].a << "x^" << i;
// if(i != f.size()-1) cout << " + ";
}
}
m pw(m x, m y){
if(y == 0) return 1;
auto s = pw(x, y.a / 2);
s = s * s % mod;
if(y % 2 == 1) s = s * x % mod;
return s;
}
m inv(m a){
return pw(a, mod-2);
}
vector<m> smF2(vector<m> f){ // g(x) = f(0) + f(1) + f(2) + ... + f(x) // ax^2 + bx + c
vector<m> ret(4, 0);
m a = f[2];
m b = f[1];
m c = f[0];
ret[0] = c;
ret[1] = c + (a + b) * inv(2) - a * inv(3);
ret[2] = (a + b) * inv(2);
ret[3] = a * inv(3);
return ret;
}
vector<m> smF3(vector<m> f){
vector<m> ret(5, 0);
m a = f[3];
m b = f[2];
m c = f[1];
m d = f[0];
ret[0] = d;
ret[1] = a * inv(4) - (a * 3ll * inv(2) + b) * inv(3) + (a * inv(2) + b + c) * inv(2) + d;
ret[2] = (a * inv(2) + b + c) * inv(2);
ret[3] = (a*3ll * inv(2) + b) * inv(3);
ret[4] = a * inv(4);
return ret;
}
m f(vector<m> F, m x){
m ret = 0;
for(m i = 0; i < F.size(); i = i + 1){
ret = ret + pw(x, i) * F[i.a];
}
return ret;
}
m getSum(vector<m> F, m h, m k){
m n1 = (h+1) * k * (k-1) * inv(2ll);
m n2 = f(smF2(F), h) * k;
return n1 + n2;
}
m getKvad1(){
return 0;
}
m fff(m a, m b, m c, m d, m x){
return pw(x, 3)*(a*2ll) + pw(x, 2)*(b*2ll+a+a*d+2) + x*(c*2ll+d*2ll+d*b+b+1) + (c*d + d + c);
}
m FFF(m a, m b, m c, m d, m x){
if(x == -1) return 0;
m A = a * inv(2);
m B = (a*4ll + b*2ll + a*d + 2ll) * inv(3);
m C = (b + a*2ll + b*2ll + a*d + 2ll + c*2ll + d*2ll + b*d + 1ll) * inv(2);
m E = c + d + c*d;
m D = A - B + C + E;
return pw(x, 4)*A + pw(x, 3) * B + pw(x, 2) * C + pw(x, 1) * D + E;
}
m getFullSum4(m h, m w){ // 4 ketvircio staciakampio suma
// h - aukstis, w - plotis
// kvadrato suma
m ret = FFF(4, 3, 1, 1, min(h.a, w.a-1));
if(h.a+1 >= w.a){ // vertikalus
// cout << "vertikalus! " << endl;
// cout << getSum({1, 3, 4}, h, w+1).a << " - " << getSum({1, 3, 4}, w-1, w+1).a << endl;
ret = ret + getSum({1, 3, 4}, h, w+1) - getSum({1, 3, 4}, w-1, w+1);
}else{ // horizontalus
ret = ret + getSum({m(1) - h, m(-3), m(4)}, w, h + m(1)) - getSum({m(1) - h, m(-3), m(4)}, h+m(1), h+m(1));
}
return ret;
}
m getFullSum2(m h, m w){
m ret = FFF(4, -3, 1, 0, min(h, w));;
if(h.a >= w.a){
ret = ret + getSum({m(1), m(-3)-w, m(4)}, h, w+1) - getSum({m(1), m(-3)-w, m(4)}, w, w+1);
}else{
ret = ret + getSum({m(1), m(-3), m(4)}, w, h+1) - getSum({m(1), m(-3), m(4)}, h, h+1);
}
return ret;
}
int main() {
int x, y; cin >> x>> y >> x >> y;
cout << getFullSum2(x, y).a;
return 0;
cout << endl << endl;
// cout << fff(4, -1, 1, 0, 3);
// cout << FFF(4, -3, 1, 0, 2);
// cout << fff(4, -3, 1, 0, 2);
cout << endl << endl;
print(smF3({1, 3, 1, 2}));
cout << endl;
//cout << f(4, 5) - f(4, 3);
//cout << f(3, 3) - f(3, 2) + 1;
// cout << kvad(2);
getSum({m(1), m(3), m(4)}, m(4), m(2));
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
204 KB |
Output isn't correct |
