P1855 榨取kkksc03

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#include<bits/stdc++.h>
using namespace std;
const int MAXW1 = 200;
const int MAXW2 = 200;
const int INF = 0x3f3f3f3f;

int n, W1, W2;
int d[MAXW1 + 10][MAXW2 + 10];

inline int read() {
    register char c;
    for (c = getchar(); (c < '0' || c>'9') && c != '-'; c = getchar());
    register bool f = c == '-';
    register int s = f ? 0 : c - '0';
    for (c = getchar(); c >= '0' && c <= '9'; c = getchar())s = (s << 3) + (s << 1) + c - '0';
    return f ? -s : s;
}

int eva_maxV(int W1, int W2) {
    int ans = -INF;
    for (int i = 0; i <= W1; i++) {
        for (int j = 0; j <= W2; j++)  ans = max(ans, d[i][j]);
    }
    return ans;
}

int main() {
    n = read();
    W1 = read();
    W2 = read();
    int v, w1, w2;
    for (int i = 1; i <= n; i++) {
        v = 1;
        w1 = read();
        w2 = read();
        for (int j = W1; j >= w1; j--) {
            for (int k = W2; k >= w2; k--) d[j][k] = max(d[j][k], d[j - w1][k - w2] + v);
        }
    }
    cout << eva_maxV(W1, W2);
}