#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define pb push_back
const int S = 1e5 + 100;
ll dp[S][15][2], a[S][2], s[S], pref[S][15], dppref[S][15], dpsuf[S][15];
long long max_weights(int n, int m, std::vector<int> x, std::vector<int> y, std::vector<int> w){
bool case1 = 1, case2 = 1;
for(int i = 0; i < m; ++i){
if(x[i] % 2) case1 = 0;
if(x[i] > 1) case2 = 0;
}
if(case1){
ll ans = 0;
for(int i = 0; i < m; ++i) ans += w[i];
return ans;
}
if(case2){
ll ans1 = 0, ans2 = 0;
for(int i = 0; i < m; ++i){
if(x[i] == 0) ans1 += w[i];
else ans2 += w[i];
}
if(n == 2)
return max(ans1, ans2);
else{
ll best = 0, sum = 0;
int p = 0;
for(int i = 0; i <= n + 1; ++i) a[i][0] = a[i][1] = s[i] = 0;
for(int i = 0; i < m; i++) if(x[i] == 0) a[y[i]][0] = w[i]; else a[y[i]][1] = w[i];
for(int i = n; i >= 0; --i) s[i] = s[i + 1] + a[i][1];
for(int i = 0; i <= n + 1; ++i){
best = max(best, s[i] + sum);
sum += a[i][0];
}
return best;
}
}
for(int i = 0; i <= n + 5; ++i){
for(int j = 0; j < 15; ++j) pref[i][j] = dp[i][j][0] = dp[i][j][1] = dppref[i][j] = dpsuf[i][j] = 0;
}
for(int i = 0; i < m; ++i) pref[x[i]][y[i] + 1] = w[i];
for(int i = 0; i <= n; ++i){
for(int j = 1; j < 15; ++j) pref[i][j] += pref[i][j - 1];
}
for(int i = 0; i <= n; ++i){
for(int j = 0; j < 10; ++j){
if(i == 0){
dp[i][j][0] = dp[i][j][1] = pref[i + 1][j];
continue;
}
dp[i][j][0] = pref[i + 1][j] + pref[i - 1][j] + dppref[i - 1][j];
dp[i][j][1] = pref[i + 1][j] - pref[i][j] + dpsuf[i - 1][j];
}
for(int j = 0; j < 10; ++j){
if(j == 0) dppref[i][j] = dp[i][j][0] - pref[i + 1][j] - pref[i][j];
else dppref[i][j] = max(dppref[i][j - 1], dp[i][j][0] - pref[i + 1][j] - pref[i][j]);
}
for(int j = 9; j >= 0; --j){
if(j == 9) dpsuf[i][j] = max(dp[i][j][0], dp[i][j][1]);
else dpsuf[i][j] = max({dpsuf[i][j + 1], dp[i][j][0], dp[i][j][1]});
}
}
return max(dp[n][0][0], dp[n][0][1]);
}
2
Compilation message
fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:31:17: warning: unused variable 'p' [-Wunused-variable]
31 | int p = 0;
| ^
fish.cpp: At global scope:
fish.cpp:77:1: error: expected unqualified-id before numeric constant
77 | 2
| ^
