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OI-codes/ybt/1290/1290.cpp

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