这题...一言难尽
1 #include <bits/stdc++.h> 2 #define maxn 13003 3 #define _for(i,a,b) for(int i = (a);i < b;i ++) 4 typedef long long ll; 5 using namespace std; 6 7 inline ll read() 8 { 9 ll ans = 0; 10 char ch = getchar(), last = ' '; 11 while(!isdigit(ch)) last = ch, ch = getchar(); 12 while(isdigit(ch)) ans = (ans << 1) + (ans << 3) + ch - '0', ch = getchar(); 13 if(last == '-') ans = -ans; 14 return ans; 15 } 16 inline void write(ll x) 17 { 18 if(x < 0) x = -x, putchar('-'); 19 if(x >= 10) write(x / 10); 20 putchar(x % 10 + '0'); 21 } 22 int T,n; 23 struct chen 24 { 25 ll a; 26 ll b; 27 }; 28 chen per[20004]; 29 ll c[20004]; 30 ll suma[20004]; 31 bool cmp(chen x,chen y) 32 { 33 return min(x.a,y.b)==min(y.a,x.b)?x.a<y.a:min(x.a,y.b)<min(y.a,x.b); 34 } 35 36 int main() 37 { 38 T = read(); 39 while(T--) 40 { 41 n = read(); 42 _for(i,1,n+1) 43 per[i].a = read(),per[i].b = read(); 44 sort(per+1,per+1+n,cmp); 45 _for(i,1,n+1) 46 suma[i] = suma[i-1] + per[i].a; 47 _for(i,1,n+1) 48 c[i] = max(c[i-1],suma[i]) + per[i].b; 49 write(c[n]); 50 printf(" "); 51 } 52 return 0; 53 }