usaco Score Inflation

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很裸的完全背包...

code：

/*    ID:yueqi    LANG:C++    TASK:inflate*/#include <set>#include <map>#include <ctime>#include <queue>#include <cmath>#include <stack>#include <limits.h>#include <vector>#include <bitset>#include <string>#include <cstdio>#include <cstring>#include <fstream>#include <string.h>#include <iostream>#include <algorithm>#define Si set<int>#define LL long long#define pb push_back#define PS printf(" ")#define Vi vector<int>#define LN printf("\n")#define lson l,m,rt << 1#define rson m+1,r,rt<<1|1#define SD(a) scanf("%d",&a)#define PD(a) printf("%d",a)#define SET(a,b) memset(a,b,sizeof(a))#define FF(i,a) for(int i(0);i<(a);i++)#define FD(i,a) for(int i(a);i>=(1);i--)#define FOR(i,a,b) for(int i(a);i<=(b);i++)#define FOD(i,a,b) for(int i(a);i>=(b);i--)#define readf freopen("inflate.in","r",stdin)#define writef freopen("inflate.out","w",stdout)const int maxn = 10001;const long long BigP=999983;const long long  INF = 0x5fffffff;const int dx[]={-1,0,1,0};const int dy[]={0,1,0,-1};const double pi = acos(-1.0);const double eps= 1e-7;using namespace std;int N,M;int a[maxn],v[maxn],dp[maxn];int main(){    readf;    writef;    SD(N);SD(M);    FOR(i,1,M){        SD(v[i]);SD(a[i]);    }    FOR(i,1,M) FOR(j,a[i],N){        dp[j]=max(dp[j],dp[j-a[i]]+v[i]);    }    PD(dp[N]);LN;    return 0;}