This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#define DBG 1
// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>
//#include<ext/pb_ds/tree_policy.hpp>
//#include<ext/pb_ds/assoc_container.hpp>
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) if (DBG) cerr << #x << " = " << x << endl;
using namespace std;
//using namespace __gnu_pbds;
typedef long long ll;
typedef pair<int, int> pii;
//template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int MAXN = (int)2e5 + 5;
vector<int> pos[MAXN];
vector<pii> stars[MAXN];
ll dp[MAXN], ext[MAXN], ext2[MAXN];
ll t[MAXN << 2];
int par[MAXN], L[MAXN], R[MAXN], sz[MAXN];
int arr[MAXN];
bool active[MAXN];
ll sum;
int n, m;
void update(int v, int tl, int tr, int l, int r, ll x) {
if (l > r || tl > r || tr < l) {
return;
}
if (l <= tl && tr <= r) {
t[v] += x;
return;
}
int mid = (tl + tr) >> 1;
int c1 = (v << 1), c2 = (c1 | 1);
update(c1, tl, mid, l, r, x);
update(c2, mid + 1, tr, l, r, x);
}
ll getVal(int v, int tl, int tr, int p) {
if (tl == tr) {
return t[v];
}
int mid = (tl + tr) >> 1;
int c1 = (v << 1), c2 = (c1 | 1);
if (p <= mid) {
return t[v] + getVal(c1, tl, mid, p);
}
else {
return t[v] + getVal(c2, mid + 1, tr, p);
}
}
int getPar(int x) {
if (x == par[x]) {
return x;
}
return par[x] = getPar(par[x]);
}
void uni(int a, int b) {
a = getPar(a);
b = getPar(b);
if (a == b) {
return;
}
if (sz[a] < sz[b]) {
swap(a, b);
}
par[b] = a;
sz[a] += sz[b];
dp[a] += ext2[a];
ext[a] += ext2[a];
ext2[a] = 0;
dp[b] += ext2[b];
ext[b] += ext2[b];
ext2[b] = 0;
//if (ext[b]) printf("U %d %d %d\n", L[a], R[a], ext[b]);
//if (ext[a]) printf("U %d %d %d\n", L[b], R[b], ext[a]);
update(1, 1, n, L[a], R[a], ext[b]);
update(1, 1, n, L[b], R[b], ext[a]);
ext[a] += ext[b];
dp[a] += dp[b];
L[a] = min(L[a], L[b]);
R[a] = max(R[a], R[b]);
}
void solve() {
scanf("%d", &n);
for (int i = 1; i <= n; ++i) {
scanf("%d", &arr[i]);
pos[arr[i]].pb(i);
}
scanf("%d", &m);
for (int i = 1; i <= m; ++i) {
int x, y, c;
scanf("%d %d %d", &x, &y, &c);
stars[y].pb(mp(x, c));
sum += c;
}
for (int i = 1; i <= n; ++i) {
par[i] = i;
L[i] = R[i] = i;
dp[i] = ext[i] = 0;
active[i] = 0;
}
for (int y = 1; y <= n; ++y) {
//printf("%d:\n", y);
//for (int x = 1; x <= n; ++x) {
//if (active[x] && getPar(x) == x) {
//printf("%d - (%d %d) - %lld %lld %lld\n", x, L[x], R[x], dp[x], ext[x], ext2[x]);
//}
//}
for (auto it : stars[y]) {
int x, c;
tie(x, c) = it;
int p = getPar(x);
ext2[p] = max(ext2[p], c + getVal(1, 1, n, x) - dp[p]);
}
//printf("%d:\n", y);
//for (int x = 1; x <= n; ++x) {
//if (active[x] && getPar(x) == x) {
//printf("%d - (%d %d) - %lld %lld %lld\n", x, L[x], R[x], dp[x], ext[x], ext2[x]);
//}
//}
for (int x : pos[y]) {
active[x] = 1;
if (active[x - 1]) {
uni(x - 1, x);
}
if (active[x + 1]) {
uni(x, x + 1);
}
}
}
ll ans = 0;
for (int i = 1; i <= n; ++i) {
if (getPar(i) == i) {
ans = max(ans, dp[i] + ext2[i]);
}
}
printf("%lld\n", sum - ans);
}
int main() {
int tt = 1;
while (tt--) {
solve();
}
return 0;
}
Compilation message (stderr)
constellation3.cpp: In function 'void solve()':
constellation3.cpp:106:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
constellation3.cpp:109:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &arr[i]);
~~~~~^~~~~~~~~~~~~~~
constellation3.cpp:113:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &m);
~~~~~^~~~~~~~~~
constellation3.cpp:117:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d", &x, &y, &c);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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