This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "fish.h"
using namespace std;
typedef long long ll;
int n, m;
vector<int> x, y, w;
vector<vector<pair<int, int>>> f; // y, w
vector<vector<int>> relH;
ll sum(int i, int j) {
ll res = 0;
for (int k = 0; k < f[i].size(); k++) {
if (f[i][k].first < j) res += f[i][k].second;
}
return res;
}
ll max_weights(int N, int M, vector<int> X, vector<int> Y, vector<int> W) {
n = N; m = M; x = X; y = Y; w = W;
f = vector<vector<pair<int, int>>>(n);
relH = vector<vector<int>>(n);
for (int i = 0; i < m; i++) {
f[x[i]].push_back({y[i], w[i]});
if (x[i] > 0) relH[x[i]-1].push_back(y[i]+1);
if (x[i] < n-1) relH[x[i]+1].push_back(y[i]+1);
}
for (int i = 0; i < n; i++) {
relH[i].push_back(0);
sort(f[i].begin(), f[i].end());
sort(relH[i].begin(), relH[i].end());
}
vector<vector<vector<ll>>> dp(n);
for (int j = 0; j < relH[0].size(); j++) {
dp[0].push_back(vector<ll>(1));
}
for (int i = 1; i < n; i++) {
dp[i] = vector<vector<ll>>(relH[i].size());
for (int j = 0; j < relH[i].size(); j++) {
dp[i][j] = vector<ll>(relH[i-1].size());
}
}
for (int i = 1; i < n; i++) {
for (int j = 0; j < relH[i].size(); j++) {
for (int j1 = 0; j1 < relH[i-1].size(); j1++) {
for (int k = 0; k < (i < 2 ? 1 : relH[i-2].size()); k++) {
ll val = dp[i-1][j1][k];
if (relH[i-1][j1] > relH[i][j]) val += sum(i, relH[i-1][j1]) - sum(i, relH[i][j]);
if (relH[i][j] > max(relH[i-1][j1], i < 2 ? 0 : relH[i-2][k])) val += sum(i-1, relH[i][j]) - sum(i-1, max(relH[i-1][j1], i < 2 ? 0 : relH[i-2][k]));
dp[i][j][j1] = max(dp[i][j][j1], val);
}
}
}
}
ll res = 0;
for (int j = 0; j < relH[n-1].size(); j++) {
for (int j1 = 0; j1 < relH[n-2].size(); j1++) {
res = max(res, dp[n-1][j][j1]);
}
}
return res;
}
#ifdef TEST
#include "grader.cpp"
#endif
Compilation message (stderr)
fish.cpp: In function 'll sum(int, int)':
fish.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
14 | for (int k = 0; k < f[i].size(); k++) {
| ~~^~~~~~~~~~~~~
fish.cpp: In function 'll max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | for (int j = 0; j < relH[0].size(); j++) {
| ~~^~~~~~~~~~~~~~~~
fish.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | for (int j = 0; j < relH[i].size(); j++) {
| ~~^~~~~~~~~~~~~~~~
fish.cpp:46:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
46 | for (int j = 0; j < relH[i].size(); j++) {
| ~~^~~~~~~~~~~~~~~~
fish.cpp:47:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
47 | for (int j1 = 0; j1 < relH[i-1].size(); j1++) {
| ~~~^~~~~~~~~~~~~~~~~~
fish.cpp:48:35: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
48 | for (int k = 0; k < (i < 2 ? 1 : relH[i-2].size()); k++) {
| ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fish.cpp:59:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
59 | for (int j = 0; j < relH[n-1].size(); j++) {
| ~~^~~~~~~~~~~~~~~~~~
fish.cpp:60:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for (int j1 = 0; j1 < relH[n-2].size(); j1++) {
| ~~~^~~~~~~~~~~~~~~~~~
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