#include <stdio.h>
 
typedef float Area[2];  // 0-площадь, 1-урожайность 
typedef Area Region[10];
 
int main(void) {
  Region R = {{1.0,2.0},{1.1,2.1},{1.2,2.2},{1.3,2.3},{1.4,2.4},
              {1.5,2.5},{1.6,2.6},{1.7,2.7},{1.8,2.8},{1.9,2.9}};
  float A = 0.0, 
        B = 0.0;
  for(int i=0; i<10; i++) {
    A += R[i][0]*R[i][1];
    B += R[i][1];
  }
  printf("Планируемый урожай: %0.2f\n", A);
  printf("Средняя урожайность: %0.2f\n", B/10.0);
  return 0;
}
 

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