#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}
template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
void setIO(string s) {
freopen((s + ".in").c_str(), "r", stdin);
freopen((s + ".out").c_str(), "w", stdout);
}
#ifdef local
void CHECK();
void setio(){
freopen("/Users/iantsai/cpp/input.txt","r",stdin);
freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 1e5+5;
int n, m, ans;
struct DSU{
int to[mxn], num[mxn];
set<int> g[mxn], out[mxn], in[mxn];
vector<pii> to_merge;
void init(){
for(int i=1;i<=n;i++){
g[i].insert(i);
num[i] = 1;
to[i] = i;
}
}
int find(int x){
return x == to[x] ? x : to[x] = find(to[x]);
}
void merge(int x,int y){
if(x == y){
return ;
}
if(sz(g[x]) > sz(g[y])){
swap(x, y);
}
ans = ans+num[x]*sz(g[y])+num[y]*sz(g[x]);
for(auto u:g[x]){
if(g[y].count(u)){
ans -= num[x]+num[y];
}
else{
g[y].insert(u);
}
}
to[x] = y;
num[y] += num[x];
in[x].erase(y);
in[y].erase(x);
out[x].erase(y);
out[y].erase(x);
for(auto v : in[x]){
out[v].erase(x);
add(v, y);
}
for(auto v : out[x]){
in[v].erase(x);
add(y, v);
}
}
void add(int x, int y){
in[y].insert(x);
out[x].insert(y);
if(out[y].count(x)){
to_merge.pb({x, y});
}
}
void cal(int x, int y){
int px = find(x), py = find(y);
y = py;
if(px!=py and !g[y].count(x)){
g[y].insert(x);
ans += num[y];
x = px;
add(x, y);
while(sz(to_merge)){
auto [v, u] = to_merge.back();
to_merge.pop_back();
merge(v, u);
}
}
}
}d;
signed main(){
TOI_is_so_de;
cin >> n >> m;
d.init();
for(int i=0;i<m;i++){
int x, y;
cin >> x >> y;
d.cal(x, y);
cout << ans << '\n';
}
#ifdef local
CHECK();
#endif
}
/*
input:
*/
#ifdef local
void CHECK(){
cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
std::ifstream file1(p1);
std::ifstream file2(p2);
if (!file1.is_open() || !file2.is_open())return false;
std::string line1, line2;
while (getline(file1, line1) && getline(file2, line2)) {
if (line1 != line2)return false;
}
int cnta=0,cntb=0;
while(getline(file1,line1))cnta++;
while(getline(file2,line2))cntb++;
return cntb-cnta<=1;
};
bool check = compareFiles("output.txt","expected.txt");
if (check) cerr<<"ACCEPTED\n";
else cerr<<"WRONG ANSWER!\n";
}
#else
#endif
Compilation message
joitter2.cpp: In function 'void setIO(std::string)':
joitter2.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joitter2.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
36 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 2 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 3 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 4 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 5 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 6 |
Correct |
3 ms |
15708 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
15964 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 2 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 3 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 4 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 5 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 6 |
Correct |
3 ms |
15708 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
15964 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 2 |
Correct |
3 ms |
15704 KB |
Output is correct |
| 3 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 4 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 5 |
Correct |
2 ms |
15708 KB |
Output is correct |
| 6 |
Correct |
3 ms |
15708 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
15964 KB |
Output isn't correct |
| 8 |
Halted |
0 ms |
0 KB |
- |
