Rank Tên đăng nhập Điểm ▾ Bài tập Giới thiệu
20101 190 2
20102 190 1
20102 190 1

Hiiiiiiii

20102 190 1
20102 190 1
20102 190 1
20102 190 1
20102 190 1
20109
mttn113nc
NC QNg Nguyen Quoc Phu
190 4
20110 190 1
20111 188 2
20112 188 3
20113 188 3
20114 188 1
20115
mttn103nc
NC BDi-CVA To Quang Nhat
187 3
20116
yueakayue
TranVuAnh
187 4

Nothing here

20117
THTA21
Phạm Quang Hoạch
187 2
20118 186 2
20118 186 2
20120
dzunghandsome
Đào Việt Dũng
186 1
20121 186 2
20121 185 3
20123
mttn149nc
NC NT Vo Le Ngoc Thinh
185 4
20124 185 1
20125
mttn119nc
NC DNa Vu Hoang Long
184 4
20126 184 3
20127 183 2
20128 183 2
20129
mttn012cb
CB GL Dang Xuan Bach
182 3
20129
mttn052cb
CB DNo Hoang Manh Hung
182 4
20131 182 2
20131 182 2

My name is Long

20133 182 1
20134
mttn016cb
CB BP-CBL Phan Nguyen Quoc Bao
182 4
20135
mttn173nc
NC HCMUTE Tran Canh Nam
182 3
20136 181 2
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1

include<iostream>

include<algorithm>

using namespace std;

int main () {
int n;
cin >> n;
int a[n];
for (int i=0;i<n;i++) { cin >> a[i];
}
int dem=0;
sort (a,a+n);
int i=0,j=1,k=n-1;
while (true) {
while ((a[i]+a[j])<=a[k]) {
if (j<k-1) j++; else i++; if (i==(j-1) && j == (k-1) ) break; } if ( (a[i]+a[j])>a[k] && i<j && j < k) {
dem=dem+(k-j)*(j-i);
}
i=0;j=1;k=k-1;
if (k==1)break;
}
cout << dem;
}

20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1

NOTHING

20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 1
20137 180 2
20137 179 2
20137 179 2
20137 179 2
20166 179 4
20167 179 2
20168 178 3
20169 178 2
20169 177 2
20169
tuananh_Ngroup
Lê Xuân Tuấn Anh
177 2
20169
A_142
NGUYEN HOANG ANH TUAN
177 2
20169
A_143
HUYNH NGUYEN LAN PHUONG
177 2
20169
A_163
VAN HOANG NGAN
177 2
20169 177 2
20169 177 2
20169 177 2
20169
THTA33
Đào Mộc Lan
177 2
20169 177 2
20169 177 2

include<bits/stdc++.h>

using namespace std;

int main() {
string s;
getline(cin,s);
for (int i = 0; i < s.size(); i++) {
if (s[i] >= 'a' && s[i] <= 'z') {
s[i] -= 32;

    }
        else s[i] += 32;

}

cout << s;
return 0;

}

20169 177 2
20169 177 2
20169 177 2
20169 177 2
20185
mttn148nc
NC QNa-LTT Tran Huynh Huu Thinh
177 3
20186 176 2
20186 176 2
20188 176 1
20189 175 1
20189 175 1
20189 175 1
20189 175 1
20189 175 1
20194
mttn032cb
CB QNa-NBK Nguyen Cao Duc
174 3
20195 174 2
20196
mttn094nc
NC BDi-LQD Nguyen Trung Nguyen
173 4
20197 173 1
20198
mttn150nc
NC DL Pham Ngoc Tho
173 4
20199 171 1
20199 171 1