#include <bits/stdc++.h> using namespace std; #define REP(i,a,b) for (int i = (a); i <= (b); ++i) #define REPD(i,a,b) for (int i = (a); i >= (b); --i) #define FORI(i,n) REP(i,1,n) #define FOR(i,n) REP(i,0,int(n)-1) #define mp make_pair #define pb push_back #define pii pair<int,int> #define vi vector<int> #define ll long long #define SZ(x) int((x).size()) #define DBG(v) cerr << #v << " = " << (v) << endl; #define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++) #define fi first #define se second const int N = 1000100; long long dp[2][N]; long long a[N], b[N]; pair<ll,ll> t[N]; int main() { int n; scanf("%d", &n); FOR(i,n) scanf("%lld%lld", &t[i].fi, &t[i].se); sort(t,t+n); FOR(i,n) a[i] = t[i].fi, b[i] = t[i].se; FOR(p,n) { FOR(l,n) { if (p==0) dp[1][l] = b[l]; else if (l==0) dp[1][l] = 0; else dp[1][l] = max(dp[0][l-1], dp[1][l-1]-(b[l-1]+a[l-1]*p)) + b[l]+a[l]*p; } long long mx=0; FOR(l,n) { dp[0][l] = dp[1][l]; mx = max(mx, dp[1][l]); } printf("%lld\n", mx); } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #include <bits/stdc++.h> using namespace std; #define REP(i,a,b) for (int i = (a); i <= (b); ++i) #define REPD(i,a,b) for (int i = (a); i >= (b); --i) #define FORI(i,n) REP(i,1,n) #define FOR(i,n) REP(i,0,int(n)-1) #define mp make_pair #define pb push_back #define pii pair<int,int> #define vi vector<int> #define ll long long #define SZ(x) int((x).size()) #define DBG(v) cerr << #v << " = " << (v) << endl; #define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++) #define fi first #define se second const int N = 1000100; long long dp[2][N]; long long a[N], b[N]; pair<ll,ll> t[N]; int main() { int n; scanf("%d", &n); FOR(i,n) scanf("%lld%lld", &t[i].fi, &t[i].se); sort(t,t+n); FOR(i,n) a[i] = t[i].fi, b[i] = t[i].se; FOR(p,n) { FOR(l,n) { if (p==0) dp[1][l] = b[l]; else if (l==0) dp[1][l] = 0; else dp[1][l] = max(dp[0][l-1], dp[1][l-1]-(b[l-1]+a[l-1]*p)) + b[l]+a[l]*p; } long long mx=0; FOR(l,n) { dp[0][l] = dp[1][l]; mx = max(mx, dp[1][l]); } printf("%lld\n", mx); } return 0; } |