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OI-codes/ybt/1258/1258.cpp

34 lines
600 B
C++

#include <iostream>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1005;
int r, g[N][N], f[N][N], ans;
int main() {
std::ios::sync_with_stdio(false);
cin >> r;
for (int i = 1; i <= r; i++) {
for (int j = 1; j <= i; j++) {
cin >> g[i][j];
}
}
for (int i = 1; i <= r; i++) {
for (int j = 1; j <= i; j++) {
f[i][j] = std::max(f[i - 1][j - 1], f[i - 1][j]) + g[i][j];
}
}
for (int i = 1; i <= r; i++) {
ans = std::max(ans, f[r][i]);
}
cout << ans << endl;
return 0;
}